Westwood rim
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The Westwood style of cycle rim is used on bicycles with rod brakes, usually the roadster cycles found in Britain up to the 1960s and still common in the Far East. Westwood rims have rounded sides, so they are not suitable for use with caliper brakes. The inside circumference of the rim has a slightly concave profile to aid with seating of the brake pads and they often have a raised ridge down the centre to stop the blocks interfering with the spoke nipples.
[edit] Sizes
Westwood rims are most commonly seen in sizes 28 x 1 1/2", 26 X 1 3/8" and 20 X 2 1/2".
