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Compact chainrings have been the dominant standard for mountain bike cranks since the mid nineties. In the context of road cycling , compact drivetrain typically refers to double cranksets with a smaller (usually 110 mm (4.3 in)) bolt circle diameter than the standard 130 mm (5.1 in) or Campagnolo's 135 mm (5.3 in).
They can be used individually, as an external derailleur or an internal hub gear, or in combinations such as the SRAM Dual Drive, which uses a standard 8 or 9-speed cassette mounted on a three-speed internally geared hub, offering a similar gear range as a bicycle with a cassette and triple chainrings. Derailleur gears. Cogset; Crankset; Hub gear
2006 Hollow external bearing crankset is announced Ultra-Torque crankset with Hirth joint. 2007 10-speed Mirage and Xenon component groups and new Ultra-Torque components are introduced. Record hubs are now black, 20 g lighter and don't have grease ports any more 2008 11-speed Record, Super Record, and Chorus groups are introduced
With a one-piece (also called Ashtabula) crank and bottom bracket, the spindle and crank arms are a single piece. The bottom bracket shell is large to accommodate removal of this S-shaped crank. Bearing cups are pressed into the bottom bracket shell. The crank holds the cones, facing in; adjustment is made via the left-threaded non-drive side cone.
Pisgah: Geometry identical to the Citico, the Pisgah puts Litespeed performance into service for any cross-country, single-speed, or urban MTB build. Compatible with both 26" and 650b wheels. [16] Sewanee: A full-suspension cross country race bike, the latest Sewanee features 90 mm of rear travel in a cold-worked 3Al/2.5V titanium frame ...
The term bicycle tools usually refers to specialty tools only used on bicycles, as opposed to general purpose mechanical tools such as spanners and hex wrenches. Various bicycle tools have evolved over the years into specialized tools for working on a bicycle. Modern bicycle shops will stock a large number of tools for working on different ...
Single-speed mountain bike. A single-speed bicycle is a type of bicycle with a single gear ratio and a freewheel mechanism. These bicycles are without derailleur gears, hub gearing or other methods for varying the gear ratio of the bicycle. Adult single-speed bicycles typically have a gear ratio of between 55 and 75 gear inches, depending on ...
Single-speed bicycle builders have converted many former multi-geared cycles into single or fixed gear through the removal of the derailleurs and associated hardware. The simplest conversion uses the existing freewheel/cassette and crankset, the chain being cut to fit the desired gear ratio.