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Chainring: (one of the) front gear(s), attached to a crank; Chainset: see Crankset; Chainstay: a pair of tubes on a bicycle frame that runs from the bottom bracket to the rear fork ends; Chain tensioner: a device to maintain proper chain tension; Chaintug: a device to aid in setting the proper chain tension
A few small specialty manufacturers make bicycle cranks in a number of sizes smaller than 165 mm (6.5 in) and longer than 180 mm (7.1 in). ... BMX, cruiser bikes, one ...
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. One-piece cranks are easily maintained and reliable, but heavy. They are found on BMX bikes as well as children's bicycles and low-end road and mountain bikes.
BMX bicycles are available in these types: [1] Dirt – These bikes feature tires with thicker and wider tread for better grip on potentially loose surfaces. Flatland – flatland style BMX bikes have different frame geometry to traditional park BMX bikes because flatland riding requires precise balance on multiple parts of the bike.
The simplest conversion uses the existing freewheel/cassette and crankset, the chain being cut to fit the desired gear ratio. However this retains unnecessary weight and the chainline will most likely not be perfect. A more thorough conversion will involve replacing the freewheel with a single-speed one, and re-dishing the rear wheel.
They would be BMX's first tubular chromoly three piece cranks which would become Redline's most popular product. In 1982 Redline introduced the Proline ll, the MXlll series and expanded their line with the PL-20 and the PL-24. The PL-24 would be their first BMX bike with 24 inch wheels, commonly known as a cruiser.
A commonly used metric alternative is known as metres of development or rollout distance, which specifies how many metres a bicycle travels per revolution of the crank. Typical gear ratios on bicycles range from very low or light gearing around 20 gear inches (1.6 metres per revolution), via medium gearing around 70 gear inches (5.6 m), to very ...
The BXR bike (a.k.a. Bicycle Crossroadster) or Sport Touring BMX. features a lightweight BMX bike-sized (20-inch/406 mm rims) wheels or (22-inch/451 mm rims) wheels; Built-in frames, usually from the BMX racing, minivelos or foldable city/touring bikes.