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The available codes were SR (180 km/h, 112 mph), HR (210 km/h, 130 mph), VR (in excess of 210 km/h, 130 mph), and ZR (in excess of 240 km/h, 150 mph). In many countries, the law requires that tires must be specified, and fitted, to exceed the maximum speed of the vehicle they are mounted on, with regards to their speed rating code (except for ...
Production bicycle tires at 120 psi (8.3 bar) and 50 km/h (31 mph), measured on rollers 0.0050: Dirty tram rails (standard) with straights and curves [citation needed] 0.0045 to 0.0080 [29] Large truck tires 0.0055 [23] Typical BMX bicycle tires used for solar cars 0.0065 [30] EU passenger car tyre label fuel efficiency class A (upper limit)
In utility cycling there is large variations in speeds reached. An elderly person on an upright roadster might do less than 10 km/h (6.2 mph) while a fitter or younger person could easily do twice that on the same bicycle. For cyclists in Copenhagen, the average cycling speed is 15.5 km/h (9.6 mph). [11]
Bicycle tire. A clincher bicycle tire mounted on a wheel. A cross section of a clincher tire with a puncture-preventing layer (in blue) between the casing and the tread. An inner tube rolled up for storage or to be carried as a spare. A bicycle tire is a tire that fits on the wheel of a bicycle or similar vehicle.
ISO 5775. ISO 5775 is an international standard for labeling the size of bicycle tires and rims. The system used was originally developed by the European Tyre and Rim Technical Organisation (ETRTO). It is designed to make tire sizing consistent and clear. It replaces overlapping informal systems that ambiguously distinguished between sizes.
A bicycle gearbox with chain tensioner. Bicycle gearing is the aspect of a bicycle drivetrain that determines the relation between the cadence, the rate at which the rider pedals, and the rate at which the drive wheel turns. On some bicycles there is only one gear and, therefore, the gear ratio is fixed, but most modern bicycles have multiple ...
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