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The steerer tube of the fork interfaces with the frame via bearings called a headset mounted in the head tube. At the bottom of the fork, fork ends hold the wheel. Usually, either the axle is bolted to the fork, or a quick release skewer passes through a hollow axle, clamping the axle to the fork.
A Suntour Sprint rear derailleur A front derailleur manufactured by Suntour a pair of Suntour road brakes. In 1964, Suntour invented the slant-parallelogram rear derailleur. The parallelogram rear derailleur had gained prominence after Campagnolo's introduction of the "Gran Sport" in 1949, [7] [8] and the slant-parallelogram was an improvement of it that allowed the derailleur to maintain a ...
The amount of travel available has typically increased. When suspension forks were introduced, 80–100 mm of travel was deemed sufficient for a downhill mountain bike. This amount of travel is now common for cross-country disciplines, whereas downhill forks typically offer 200 mm or more of travel for handling the most extreme terrain.
A downhill bike (also known as a downhill mountain bike) is a full suspension bicycle designed for downhill cycling on particularly steep, technical trails. Unlike a typical mountain bike, durability and stability are the most important design features, compared to lighter, more versatile cross-country bikes.
Less commonly 31.8 mm (1 + 1 ⁄ 4 in) was used on some mountain bikes and tandems and has now returned on some carbon fiber forks, and 38.1 mm (1 + 1 ⁄ 2 in) is found on high end Downhill bikes. A threadless stem should match the outside diameter of the steerer tube; a reducing shim may be employed to match a 28.6 mm ( 1 + 1 ⁄ 8 in) stem ...
A hydraulic front disc brake. The disc is held by a six-bolt mount. The caliper is held attached to an IS fork mount via PM adapter. A disc brake consists of a metal disc, or "rotor", attached to the wheel hub that rotates with the wheel. Calipers are attached to the frame or fork along with pads that squeeze the rotors for braking.