Mountain biking

Mountain biking

Mountain biker riding in the Arizona desert
Highest governing body	International Mountain Bicycling Association
First played	Open to debate. Modern era began in the late 1970s
Characteristics
Mixed gender	Separate men's & women's championship although no restrictions on women competing against men.
Presence
Olympic	Since 1996

Mountain biking is the sport of riding bicycles off-road, often over rough terrain, using specially designed mountain bikes. Mountain bikes share similarities with other bikes, but incorporate features designed to enhance durability and performance in rough terrain.

Mountain biking can generally be broken down into multiple categories: cross country, trail riding, all mountain (also referred to as "Enduro"), downhill, freeride and dirt jumping. Although the majority of mountain biking falls into the categories of Trail and Cross Country riding styles.

This individual sport requires endurance, core strength and balance, bike handling skills, and self-reliance. Advanced riders pursue both steep technical descents and high incline climbs. In the case of freeriding, downhilling, and dirt jumping, aerial maneuvers are preformed off both natural features and specially constructed jumps and ramps.

Mountain biking can be performed almost anywhere from a back yard to a gravel road, but the majority of mountain bikers ride off-road trails, whether country back roads, fire roads, or singletrack (narrow trails that wind through forests, mountains, deserts, or fields). There are aspects of mountain biking that are more similar to trail running than regular bicycling. Because riders are often far from civilization, there is a strong ethic of self-reliance in the sport. Riders learn to repair their broken bikes or flat tires to avoid being stranded miles from help. Many riders will carry a backpack, including a water bladder, containing all the essential tools and equipment for trailside repairs, and many riders also carry emergency supplies in the case of injury miles from outside help. Club rides and other forms of group rides are common, especially on longer treks. A combination sport named mountain bike orienteering adds the skill of map navigation to mountain biking.

History

1800s

One of the first examples of bicycles modified specifically for off-road use is the expedition of Buffalo Soldiers from Missoula, Montana to Yellowstone in August 1896. The Swiss military had its first bike regiment in 1891.^[1]

1900s–1960s

Bicycles were ridden off-road by road racing cyclists who used cyclo-cross as a means of keeping fit during the winter. Cyclo-cross eventually became a sport in its own right in the 1940s, with the first world championship taking place in 1950. Between 1951 and 1956, the French Velo Cross Club Parisien (VCCP), comprising about twenty-one young cyclists from the outskirts of Paris where they were born, developed a sport that was remarkably akin to present-day mountain biking.^[2]

The Rough Stuff Fellowship was established in 1955 by off-road cyclists in the United Kingdom.^[3] In Oregon, one Chemeketan club member, D. Gwynn, built a rough terrain trail bicycle in 1966. He named it a "mountain bicycle" for its intended place of use. This may be the first use of that name.^[4]

In England in 1968, Geoff Apps, a motorbike trials rider, began experimenting with off-road bicycle designs. By 1979 he had developed a custom built lightweight bicycle which was uniquely suited to the wet and muddy off-road conditions found in the south-east of England. They were designed around 2 inch x 650b Nokian snow tyres though a 700x47c (28 in.) version was also produced. These were sold under the Cleland Cycles brand until late 1984. Bikes based on the Cleland design were also sold by English Cycles and Highpath Engineering until the early 1990s.

1970s–1980s

There were several groups of riders in different areas of the U.S.A. who can make valid claims to playing a part in the birth of the sport. Riders in Crested Butte, Colorado and Cupertino, California tinkered with bikes and adapted them to the rigors of off-road riding. Modified heavy cruiser bicycles, old 1930s and '40s Schwinn bicycles retrofitted with better brakes and fat tires, were used for freewheeling down mountain trails in Marin County, California in the mid-to-late 1970s. At the time, there were no mountain bikes. The earliest ancestors of modern mountain bikes were based around frames from cruiser bicycles such as those made by Schwinn. The Schwinn Excelsior was the frame of choice due to its geometry. Riders used balloon-tired cruisers and modified them with gears and motocross or BMX-style handlebars, creating "klunkers". The term would also be used as a verb since the term "mountain biking" was not yet in use. Riders would race down mountain fireroads, causing the hub brake to burn the grease inside, requiring the riders to repack the bearings. These were called "Repack Races" and triggered the first innovations in mountain bike technology as well as the initial interest of the public (on Mt. Tamalpias in Marin CA, there is still a trail titled "Repack"- in reference to these early competitions). The sport originated in California on Marin County's Mount Tamalpais.

It was not until the late 1970s and early 1980s that road bicycle companies started to manufacture mountain bicycles using high-tech lightweight materials. Joe Breeze is normally credited with introducing the first purpose-built mountain bike in 1978. Tom Ritchey then went on to make frames for a company called MountainBikes, a partnership between Gary Fisher, Charlie Kelly and Tom Ritchey. Tom Ritchey, a welder with skills in frame building, also built the original bikes. The company's three partners eventually dissolved their partnership, and the company became Fisher Mountain Bikes, while Tom Ritchey started his own frame shop. The first mountain bikes were basically road bicycle frames (with heavier tubing and different geometry) with a wider frame and fork to allow for a wider tire. The handlebars were also different in that they were a straight, transverse-mounted handlebar, rather than the dropped, curved handlebars that are typically installed on road racing bicycles. Also, some of the parts on early production mountain bicycles were taken from the BMX bicycle. Other contributors were Otis Guy and Keith Bontrager.

Tom Ritchey built the first regularly available mountain bike frame, which was accessorized by Gary Fisher and Charlie Kelly and sold by their company called MountainBikes (later changed to Fisher Mountain Bikes then bought by Trek, still under the name Gary Fisher, currently sold as Trek's "Gary Fisher Collection"). The first two mass-produced mountain bikes were sold in the early 1980s: the Specialized Stumpjumper and Univega Alpina Pro. In 2007 the documentary film Klunkerz: A Film About Mountain Bikes was released. The film documents the subject of mountain bike history during this formative period in Northern California.

At the time, the bicycle industry was not impressed with the mountain bike, which many regarded as a short-term fad. In particular, large manufacturers such as Schwinn and Fuji failed to see the significance of an all-terrain bicycle and the coming boom in 'adventure sports'. Instead, the first mass-produced mountain bikes were pioneered by new companies such as MountainBikes (later, Fisher Mountain Bikes), Ritchey, and Specialized. Specialized was an American startup company that arranged for production of mountain bike frames from factories in Japan and Taiwan. First marketed in 1981,^[5] Specialized's mountain bike largely followed Tom Ritchey's frame geometry, but used TiG welding to join the frame tubes instead of fillet-brazing, a process better suited to mass production and which helped to reduce labor and manufacturing cost.^[6] The bikes were configured with 15 gears using derailleur shifting, triple chainrings, and five rear cogs.

1990s–2000s

Throughout the 1990s and first decade of the 21st century, mountain biking moved from a little-known sport to a mainstream activity. Mountain bikes and mountain bike gear that was once only available at specialty shops or via mail order became available at standard bike stores. By the mid-first decade of the 21st century, even department stores such as Wal-Mart began selling inexpensive mountain bikes with full-suspension and disc brakes. In the first decade of the 21st century, the trends in mountain bikes include the "all mountain bike", the 29er and the singlespeed. The "all mountain bike" is characterized by 4–6 inches (100–150mm) of travel, the ability to descend and handle very rough conditions and still pedal efficiently for climbing. 29er bikes are those using 700c sized rims (as do most road bikes), but wider and suited for tires of two inches (50mm) width or more; the increased diameter wheel is able to roll over obstacles better and offers a greater tire contact patch, but also results in a longer wheelbase, making the bike less agile, and in less travel space for the suspension; thus the 29er is not suited for small riders and small winding trails. The single-speed is considered a return to simplicity with no drivetrain components or shifters, but thus requires a stronger rider.

Following the growing trend in 29-inch bikes (29ers as stated above), there have been other trends in the mountain biking community involving tire size. One of the more prevalent is the new, somewhat esoteric and exotic 650B (27.5 inch) wheelsize, based on the obscure wheel size for touring road bikes. Another interesting trend in mountain bikes is outfitting dirt jump or urban bikes with rigid forks. These bikes normally use 4–5" travel suspension forks. The resulting product is used for the same purposes as the original bike. A commonly cited reason for making the change to a rigid fork is the enhancement of the rider's ability to transmit force to the ground, which is important for performing tricks. In the mid-first decade of the 21st century, an increasing number of mountain bike-oriented resorts opened. Often, they are similar to or in the same complex as a ski resort or they retrofit the concrete steps and platforms of an abandoned factory as an obstacle course, as with Ray's MTB Indoor Park. Mountain bike parks which are operated as summer season activities at ski hills usually include chairlifts which are adapted to bikes, a number of trails of varying difficulty, and bicycle rental facilities.

Equipment

Bike

• Mountain bikes differ from other bikes primarily in that they incorporate features aimed at increasing durability and improving performance in rough terrain. Most modern mountain bikes have some kind of suspension, 26, 27.5 or 29 inch diameter tires, usually between 1.7 to 2.5 inches in width, and a wider, flat or upwardly-rising handlebar that allows a more upright riding position, giving the rider more control. They have a smaller, reinforced frame, usually made of wide tubing. Tires usually have a pronounced tread, and are mounted on rims which are stronger than those used on most non-mountain bicycles. Compared to other bikes, mountain bikes also tend to more frequently use hydraulic disc brakes. They also tend to have lower ratio gears to facilitate climbing steep hills and traversing obstacles. Pedals vary from simple platform pedals, where the rider simply places the shoes on top of the pedals, to clipless, where the rider uses a specially equipped shoe with a sole that engages mechanically into the pedal.

Accessories

• Gloves differ from road touring gloves, are made of heavier construction, and often have covered thumbs or all fingers covered for hand protection. They are sometimes made with padding for the knuckles.
• Glasses with little or no difference from those used in other cycling sports, help protect against debris while on the trail. Filtered lenses, whether yellow for cloudy days or shaded for sunny days, protect the eyes from strain. Downhill and freeride mountain bikers often use goggles similar to motorcross or snowboard goggles in unison with their fullface helmets.
• Shoes generally have gripping soles similar to those of hiking boots for scrambling over un-ridable obstacles, unlike the smooth-bottomed shoes used in road cycling. The shank of mountain bike shoes is generally more flexible than road cycling shoes. Shoes compatible with clipless pedal systems are also frequently used.
• Clothing is chosen for comfort during physical exertion in the backcountry, and its ability to withstand falls. Road touring clothes are often inappropriate due to their delicate fabrics and construction.
• Hydration systems are important for mountain bikers in the backcountry, ranging from simple water bottles to water bags with drinking tubes in lightweight backpacks (e.g., Camelbaks).
• GPS navigation device is sometimes added to the handlebars and is used to display and monitor progress on trails downloaded from the internet or pre-made mapping systems, record trails on the fly, and keep track of trip times and other data. The GPS system is often a handheld GPS device with color screen and rugged, waterproof (IPX7) design.
• Pump to inflate flat tires.
• Bike tools and extra bike tubes are important, as mountain bikers frequently find themselves miles from help, with flat tires or other mechanical problems that must be handled by the rider.
• High-power lights based on LED technology, especially for mountain biking at night.

Protective gear

The style and level of protection worn by individual riders varies greatly and is affected by many factors including terrain, environment, weather, potential obstacles on the trail, experience, technical skill, fitness, perceived risk, desired style and others too numerous to mention. A cross-country helmet and simple long fingered gloves are a good minimum for the majority of riding.

Limb protection becomes important when speeds rise, surfaces become loose and sketchy, terrain technical and crashes more common and more severe. Full-face helmets and armored suits or jackets are more suited to "gravity" and "air"-orientated disciplines which use jumps and drops, where their extra bulk and weight is outweighed by the bigger and more frequent crashes with worse consequences. Still, within XC community, the typical road-racing attire is what most riders use. Whatever protection is used it should fit well, be comfortable (or it won't be worn) on the bike as well as in the shop and suited for the particular type of riding. Gloves can offer increased comfort while riding, by alleviating compression and friction, and protection in the event of strikes to the back or palm of the hand or when putting the hand out in a fall. Gloves also protect the hand, fingers, and knuckles from abrasion on rough surfaces such as concrete. Many different styles of gloves exist, with various fits, sizes, finger lengths, palm padding and armor options available. Armoring knuckles and the backs of hands with plastic panels is common in more extreme types of mountainbiking.

• Helmets provide important head protection. The use of helmets, in one form or another, is almost universal amongst all mountain bikers. The main three types are cross-country, rounded skateboarder style (nicknamed "half shells" or "skate style") and full face. Cross-country helmets tend to be light and well ventilated, and more comfortable to wear for long periods, especially while perspiring in hot weather. In XC competitions, most bikers use the usual road racing style helmets, for their lightweight and aerodynamic qualities. Skateboard helmets are simpler and cheaper than other helmet types; provide greater coverage of the head and resist minor scrapes and knocks. Unlike road biking helmets, skateboard helmets typically have a thicker, hard plastic shell which can take multiple impact before it needs to be replaced. The trade-off for this is that they tend to be much heavier and less ventilated (sweatier), therefore not suitable for endurance-based riding.Full-face helmets (BMX-style) provide the highest level of protection, being stronger again than skateboard style and including a jaw guard to protect the face. The weight is the main issue with this type but nowadays they are often relatively well ventilated and made of high-tech materials, such as carbon fiber. Full face helmets with detachable chin-guards are being developed but are not yet available in the U.S. As all helmets should meet minimum standards, SNELL B.95 (American Standard) BS EN 1078:1997 (European Standard), DOT or "motorized ratings" are making their way into the market. The choice of helmet often comes down to rider preference, likelihood of crashing and on what features or properties of a helmet they place emphasis. Helmets are mandatory at competitive events and almost without exception at bike parks, most organisations also stipulate when and where full-face helmets must be used.
• Body armor and pads, often referred to simply as "armor", protect limbs and trunk in the event of a crash. While initially made for and marketed at downhillers, freeriders and jump/street riders, body armor has trickled into other areas of mountain biking as trails have become faster and more technical. Armor ranges from simple neoprene sleeves for knees and elbows to complex, articulated combinations of hard plastic shells and padding that cover a whole limb or the entire body. Some companies market body armor jackets and even full body suits designed to provide greater protection through greater coverage of the body and more secure pad retention. Most upper body protectors also include a spine protector that comprises plastic or metal reinforced plastic plates, over foam padding, which are joined together so that they articulate and move with the back. Some mountain bikers also use BMX-style body armor, such as chest plates, abdomen protectors, and spine plates. New technology has seen an influx of integrated neck protectors that fit securely with full face helmets. There is a general correlation between increased protection and increased weight/decreased mobility, although different styles balance these factors differently. Different levels of protection are deemed necessary/desirable by different riders in different circumstances. Backpack hydration systems such as Camelbaks where a water filled bladder is held close to the spine used by some riders for their perceived protective value. However, there is only anecdotal evidence of protection and with the exception of one specific product by the company Deuter, they are never sold as spine protection.
• First aid kits are often carried by mountain bikers, so that they are able to clean and dress cuts and abrasions and splint broken limbs. Experienced mountain bike guides may be trained in dealing with suspected spinal injuries (e.g., immobilizing the victim and keeping the neck straight). Seriously injured people may have to be removed by stretcher, by a motor vehicle suitable for the terrain, or by helicopter.

Types

Mountain biking is dominated by these major categories:

• Cross-Country (XC) generally means riding point-to-point or in a loop including climbs and descents on a variety of terrain. A typical XC bike weighs around 9-13 kilos (20-30 lbs), and has 0-125 millimeters (0-5 inches) of suspension travel front and sometimes rear.
• All-mountain/Enduro (AM) bike category typically provides 125-170 millimeters (5-7 inches) of rear and front suspension travel and stronger components than XC models, while still providing overall weight suitable for climbing and descending on a variety of terrain. While traditionally called All Mountain riding, this style has been adopted to the Enduro World Series. There are two formats of Enduro racing. "Big-Mountain" Enduro is mostly similar to a DH course, but is much longer, sometimes taking a full day to complete, incorporates a few climbing sections to keep riders challenged. "Gravity" enduro uses an equal amount uphill and downhill on paper, but the uphill segments are not timed. Typically, there is a maximum time limit on how long a rider has to reach the top of the climb. There is also a third all mountain genre called "super-D" this style of race is more similar to XC, but has sustained climbs followed by sustained descents. A super-D course has climbs that are less technical than the descents. Enduro racing is seen as the "everyman's" race in North America, and while there are still extremely high level riders such as Jérôme Clémentz that race enduro full-time, most enduro racers compete for fun.

• Downhill (DH) is, in the most general sense, riding mountain bikes downhill. The rider commonly travels to the point of descent by other means than cycling, such as a ski lift or automobile, as the weight of the downhill mountain bike often precludes any serious climbing. Downhill-specific bikes are universally equipped with front and rear suspension, large disc brakes, and use heavier frame tubing than other mountain bikes. Because of their extremely steep terrain (often located in summer at ski resorts), downhill courses are one of the most extreme and dangerous venues for mountain biking. They include large jumps (up to and including 12 meters (40 feet)), drops of 3+ meters (10+ feet), and are generally rough and steep top to bottom. To negotiate these obstacles at race speed, racers must possess a unique combination of total body strength, aerobic and anaerobic fitness, and mental control. Minimum body protection in a true downhill setting is knee pads and a full face helmet with goggles, although riders and racers commonly sport full body suits to protect themselves. Downhill bikes now weigh around 16-20 kilos (35-45 lbs), while professional downhill mountain bikes can weigh as little as 15 kilos (33 lbs), fully equipped with custom carbon fibre parts, air suspension, tubeless tires and more. Downhill frames get anywhere from 170-250 millimeters (7 to 10 inches) of travel and are usually mounted with a 200 millimeter (8 inch) travel dual-crown fork.
• Four-cross/Dual Slalom (4X) is a sport in which riders compete either on separate tracks, as in Dual Slalom, or on a short slalom track, as in 4X. Most bikes used are light hard-tails, although the last World Cup was actually won on a full suspension bike. The tracks have dirt jumps, berms, and gaps. Professionals in gravity mountain biking tend to concentrate either on downhill mountain biking or 4X/dual slalom because they are very different. However, some riders, such as Cedric Gracia, still do 4X and DH, although that is becoming more rare as 4X takes on its own identity.

• Freeride / Big Hit / Hucking. Freeride, as the name suggests is a 'do anything' discipline that encompasses everything from downhill racing without the clock to jumping, riding 'North Shore' style (elevated trails made of interconnecting bridges and logs), and generally riding trails and/or stunts that require more skill and aggressive techniques than XC. Freeride bikes are generally heavier and more amply suspended than their XC counterparts, but usually retain much of their climbing ability. It is up to the rider to build his or her bike to lean more toward a preferred level of aggressiveness. "Slopestyle" type riding is an increasingly popular genre that combines big-air, stunt-ridden freeride with BMX style tricks. Slopestyle courses are usually constructed at already established mountain bike parks and include jumps, large drops, quarter-pipes, and other wooden obstacles. There are always multiple lines through a course and riders compete for judges' points by choosing lines that highlight their particular skills. A "typical" freeride bike is hard to define, but 13-18 kilos (30-40) lbs with 150-250 millimeters (6-10 inches) of suspension front and rear.
• Dirt Jumping (DJ) is one of the names given to the practice of riding bikes over shaped mounds of dirt or soil and becoming airborne. The idea is that after riding over the 'take off' the rider will become airborne, and aim to land on the 'landing'. Dirt jumping can be done on almost anything but the bikes are generally smaller and more maneuverable hardtails so that tricks e.g. backflips, are easier to complete. The bikes are simpler so that when a crash occurs there are fewer components to break or cause the rider injury. Bikes are typically built from sturdier materials such as steel to handle repeated heavy impacts of crashes and bails.
• Trials riding consists of hopping and jumping bikes over obstacles, without touching a foot onto the ground. It can be performed either off-road or in an urban environment. It requires an excellent sense of balance. The emphasis is placed on techniques of effectively overcoming the obstacles, although street-trials (as opposed to competition-oriented trials) is much like Street and DJ, where doing tricks with style is the essence. Trials bikes look almost nothing like mountain bikes. They use either 20", 24" or 26" wheels and have very small, low frames, some types without a saddle.
• Urban/Street is essentially the same as urban BMX (or Freestyle BMX), in which riders perform tricks by riding on/over man made objects. The bikes are the same as those used for Dirt Jumping, having 24" or 26" wheels. Also, they are very light, many in the range of 25-30 lbs, and are typically hardtails with between 0-100 millimeters of front suspension. As with Dirt Jumping and Trials, style and execution are emphasized.

• Trail riding or trail biking is recreational mountain biking on recognised, and often waymarked, trails; unpaved tracks, forest paths, etc. Trails may take the form of single routes or part of a larger complexes, known as trail centres. There are "trail bike" designs for this activity.
• Mountain Bike Touring or Marathon is long distance touring on dirt roads and single track with a mountain bike. With the popularity of the Great Divide Trail, the Colorado Trail and other long distance off road biking trails specially fitted mountain bikes are increasingly being used for touring. Bike manufacturers like Salsa have even developed MTB touring bikes like the Fargo model. Mixed Terrain Cycle-Touring or rough riding is a form of mountain bike touring but involves cycling over a variety of surfaces and topography on a single route, with a single bicycle. The recent popularity of mixed terrain touring is in part a reaction against the increasing specialization of the bike industry. Focusing on freedom of travel and efficiency over varied surfaces, mixed terrain bicycle travel has a storied past.

Risks

Injuries are a given factor when mountain biking, especially in the more extreme disciplines such as downhill biking. Injuries range from minor wounds, such as cuts and abrasions from falls on gravel or other surfaces, to major injuries such as broken bones, head or spinal injuries resulting from impacts with rocks, trees or the terrain being ridden on.

Protective equipment can protect against minor injuries and reduce the extent or seriousness of major impacts, but may not protect a rider from major impacts or accidents. To reduce the risk of injury, a rider must also take steps to minimize the risk of accidents, and thus the potential for injury; by choosing trails which fall within the range of their experience level, ensuring that they are fit enough to deal with the trail they have chosen, and keeping their bike in top mechanical condition.

If a mountain biker wishes to explore more dangerous trails or disciplines, such as downhill riding, they must learn new skills, such as jumping and avoiding obstacles.

Where a rider lacks the fitness required to ride a particular class of trail, they may become fatigued, putting themselves at an increased risk of having an accident.

Lastly, maintenance of the rider's bike needs to be carried out more frequently for mountain biking than for casual commuter biking. Mountain biking places higher demands on every part of the bike. Jumps and impacts can crack the frame or damage components or the tire rims, and steep, fast descents can quickly wear out brake pads. Thus, whereas a casual rider may only check over and maintain their bike every few months, a mountain biker should check and properly maintain the bike before every ride.

Advocacy organizations

Mountain bikers have faced land access issues from the beginnings of the sport. Some areas where the first mountain bikers have ridden have faced extreme restrictions or elimination of riding.

Opposition to the sport has led to the development of local, regional, and international mountain bike groups. The different groups that formed generally work to create new trails, maintain existing trails, and help existing trails that may have issues. Groups work with private and public entities from the individual landowner to city parks departments, on up through the state level at the DNR, and into the federal level. Different groups will work individually or together to achieve results.

Advocacy organizations work through numerous methods such as education, trail work days, and trail patrols. Examples of the education an advocacy group can provide include: Educate local bicycle riders, property managers, and other user groups on the proper development of trails, and on the International Mountain Bicycling Association's rules of the Trail. Examples of trail work days can include: Flagging, cutting, and signing a new trail, or removing downed trees after a storm. A trail patrol is a bike rider who has had some training to help assist other (including non cyclists) trail users.

The International Mountain Bicycling Association (IMBA), is a non-profit advocacy group whose mission is to create, enhance and preserve trail opportunities for mountain bikers worldwide. IMBA serves as an umbrella organization for mountain biking advocacy worldwide, and represents more than 700 affiliated mountain biking groups. In 1988, five California mountain bike clubs linked to form IMBA. The founding clubs were: Concerned Off Road Bicyclists Association, Bicycle Trails Council East Bay, Bicycle Trails Council Marin, Sacramento Rough Riders, and Responsible Organized Mountain.

Environmental impact

Several studies have reported that a mountain bike's impact on a given length of trail surface is comparable to that of a hiker, and substantially less than that of an equestrian or motorized off-road vehicle.^{[7][8][9][10]}

A critical literature review by Jason Lathrop on the ecological impacts of mountain biking notes that few studies take mountain biking into account.^[11] He quotes the BLM: "An estimated 13.5 million mountain bicyclists visit public lands each year to enjoy the variety of trails. What was once a low use activity that was easy to manage has become more complex".

The environmental impacts of mountain biking can be greatly reduced by not riding on wet or sensitive trails, not skidding, and by staying on the trail.^[12]

See also

• Mountain Bike Hall of Fame
• Mountain bike racing

References

External links

Wikimedia Commons has media related to Mountain biking.

• International Mountain Biking Association
• Fat Tire Flyer, a book about the first mountain bikes by Charlie Kelly
• Black Rock Mountain Biking Produced by Oregon Public Broadcasting

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