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A gravel bicycle is a type of bicycle intended for gravel cycling, including gravel racing. [1] They are also sometimes known as " adventure bicycles ", particularly ones intended for harsher off-road terrain. While bicycles have been used for riding on such roads since bicycles were invented, the "modern" gravel bicycle, as a category, evolved ...
Gravel tires come in a variety of sizes and widths. The most common are 650b (27.5 inches) and 700c (29 inches). Tire width can vary from 30 to 50 millimeters (mm). The lower end of that range is closer to road bike tires, making them better suited for light off-road situations.
A tubed, clincher tire showing the inner tube protruding between the tire and the rim. Tubular tire rolled from rim to show glue between them. Clincher cross section schematic with 1: rim, 2: rim strip, 3: rim braking surface, 4: bead core, 5: inner tube, 6: casing, 7: tread. The first bicycle "tires" were iron bands on the wooden wheels of ...
These range from 16-inch diameter (e.g. Brompton) through 20 inches (e.g. Bike Friday) up to even 26 inches. Wheel rims also come in a variety of widths to provide optimum performance for different uses. High performance road racing rims are narrow, 18 mm or so. Wider touring or durable off-road tires require rims of 24 mm wide or more. [42]
Washboarding or corrugation[1] is the formation of periodic, transverse ripples in the surface of gravel and dirt roads. Washboarding occurs in dry, granular road material [2] with repeated traffic, traveling at speeds above 8.0 kilometres per hour (5 mph). [3] Washboarding creates an uncomfortable ride for the occupants of traversing vehicles ...
wheels must be of equal diameter, between 70 cm and 55 cm, and must have minimum 12 spokes; spokes can be round, flattened or oval, as far as no dimension of their sections exceeds 10 mm; maximum length 185 cm; maximum width 50 cm; the peak of the saddle must be at least 5 cm behind a vertical plane passing through the bottom bracket spindle
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