The Surly cassette-type cog are designed to fit on standard Shimano compatible freehub bodies. These cogs have a tall tooth profile that is essential for preventing chain skip from the extra torque a singlespeed drivetrain encounters.
|Cassette Range:||11-28 Tooth|
In addition to being a stellar SS cog, the cog base width (where it contacts the freehub body) is 4.35mm, so you can stack a few of them up and use a 9-speed shifter for a simplified multi-speed drivetrain. This width also prevents it from ruining the freehub body as a result of digging grooves into it like skinny stamped cogs have a tendency to do. Surly cogs are machined from SCM415 CroMoly steel, then heat-treated for toughness and chrome-plated for surface hardening and enhanced chain lubricity. Our cogs will work with 6-9-speed 3/32" chains, although we recommend the inherently updated quality of an 8 or 9 speed chain. They are also available in every increment from 17-22t, so you can select that perfect gear.
Note: Teeth profiles are straight forward, making them ideal for Single Speed applications however, with no twists or ramps etc the gear shifting will not be as slick as with regular Shimano cogs when used in a multiple cog line-up.
Note: When used in non-9 set-up, additional Cassette spacers will be required to fill the cassette body.
Surly Bikes manufacture a wide range of bikes, frames, parts and accessories. Surly are based in Boomington, Minnesota USA and were established in 1998. The company aims to build solid, quality components for a reasonable price.
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