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For Shimano and SRAM the cassette spacing developed as follows. Early Shimano 7-speed cassettes are 36 mm wide, with sprocket spacing of 3.65 mm, but levers and rear derailleurs are not compatible with later Shimano 7-speed cassettes, which are 38 mm wide and have 3.2 mm sprocket spacing. An 8-speed cassette is wider at 41.5 mm than a second ...
Hyperglide is the name given by cycling component manufacturer Shimano to a sprocket design in their bicycle derailleur tooth cassette systems. [1] It varies gear tooth profiles, and/or pins along the faces of freewheel or cassette sprockets, or between the chainrings in a crankset, to ease shifting between them.
Freehub vs freewheel hub. The freehub concept answers several drawbacks encountered with the freewheel design: Freewheels are threaded onto an axle hub, using conventional right-hand threads. As the bicycle rider pedals, the freewheel is continuously kept tight, as chain torque is in the right-hand direction. This becomes a problem when the ...
SRAM Force 1 drivetrain with 10-42 cassette. Avid was SRAM's next acquisition in the spring of 2004. Avid produced popular hydraulic disc brakes and gave SRAM one more means to compete with Shimano. Later that same year, SRAM purchased Truvativ, a crank, bottom bracket, and chainring manufacturer based out of San Luis Obispo, California. [11]
The smallest rear sprocket that fits on a freehub body is a 10 or 11-tooth, but with the use of a cassette hub, sometimes called a micro drive rear hub, sprockets as small as 8 teeth may be used. [2] Some examples of micro drive hubs are Shimano Microspline (12-speed, 10-teeth) and SRAM XD/XDR (11/12-speed, 9-teeth).
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 ...
Shimano 8-speed cassette showing the Hyperglide teeth profiles. Cutaways on the rear gear sprockets (called the cassette if it slides onto a freehub body) allow smoother downshifting (shifting from a small sprocket to a bigger one) as the cutaways allow the chain to roll from one sprocket to another without lifting as far off the sprocket teeth.
The coaster-brake version weighs 2400 grams, while the non-brake integrated versions weigh just under 2000 grams. This product was discontinued in 2012, and replaced with the SRAM G8. i-Motion 3 - The 3 has similar gear ratios as the Shimano Nexus three speed hubs, 36% intervals and an overall range of 186%.
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