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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).
Harbor Freight Tools won a declassification of the class action; that is, the court found that all the individual situations were not similar enough to be judged as a single class, and that their claims would require an individual-by-individual inquiry, so the case could not be handled on a class basis.
A track bicycle or track bike is a form of fixed-gear bicycle optimized for racing at a velodrome or at an outdoor track. Some road racing and club cyclists use a fixed-gear bicycle for training during the winter months, generally using a relatively low gear ratio, believed to help develop a good pedalling style. [5]
Litespeed uses 6/4 titanium, [20] which is an alloy of titanium with 6 percent aluminum and 4 percent vanadium, instead of the more-common 3/2.5 titanium. [21] It is more difficult to work with, but has a better strength to weight ratio than other available alloys. [ 20 ]
The Flying Pigeon PA-02, a single-speed utility bicycle, is the most produced bicycle model in history. A single-speed bicycle is a type of bicycle with a single gear ratio . These bicycles are without derailleur gears , hub gearing or other methods for varying the gear ratio of the bicycle.
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.
Multiple speed freewheels were common on quality high end bikes until the late 1980s. [3] Suntour — Maeda Industries (Japan) introduced a compact 6 speed freewheel which reduced the spacing between the sprockets and was the same width as a standard 5 speed freewheel but required a narrower chain than the standard.
A rigid 2002 Trek 800 Sport mountain bike An elastomer suspension stem. Bicycle suspension is the system, or systems, used to suspend the rider and bicycle in order to insulate them from the roughness of the terrain. Bicycle suspension is used primarily on mountain bikes, but is also common on hybrid bicycles.