SURLY Splined Single Speed Cog
Surly cassette-type cogs 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. 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.
Features :
Surly cogs are machined from SCM415 CroMoly steel, then heat-treated for toughness and chrome-plated for surface hardening and enhanced chain lubricity.
Surly cogs will work with 6-9-speed 3/32" chains, although they recommend the inherently updated quality of an 8 or 9 speed chain.
They are available in 15, 16, 17, 18 &19 tooth, so you can select that perfect gear
Weight : 40 - 70 grams
Surly cogs are sold separately - choose your size from what’s available from the drop down menu.
SURLY Single Speed or Track Cog
Surly track cogs are designed to spin onto standard ISO-threaded (1.375" x 24tpi) hubs, so they will work with most English, Italian and Japanese hubs, including the Surly New track hubs. The thread base is 7.4mm wide for maximum thread engagement while maintaining enough room for a track lockring to thread on. Like their cassette-splined cogs, these are made from machined, heat-treated and chrome plated SCM415 CroMoly steel, so they are tough and long lasting.
Features :
Surly cogs are machined from SCM415 CroMoly steel, then heat-treated for toughness and chrome-plated for surface hardening and enhanced chain lubricity.
These Surly cogs will work with 1/8" Single Speed chain only.
Choose your size from the available options displayed in the drop down menu above. Each Surly cog is sold separately.
Weight : 40 - 70 grams
SURLY Track Cog 3/32 inch
Surly track cogs are designed to spin onto standard ISO-threaded (1.375" x 24tpi) hubs, so they will work with most English, Italian and Japanese hubs, including the Surly New track hubs. The thread base is 7.4mm wide for maximum thread engagement while maintaining enough room for a track lockring to thread on. Like their cassette-splined cogs, these are made from machined, heat-treated and chrome plated SCM415 CroMoly steel, so they are tough and long lasting.
Features :
Surly cogs are machined from SCM415 CroMoly steel, then heat-treated for toughness and chrome-plated for surface hardening and enhanced chain lubricity.
Surly cogs will work with 6-9-speed 3/32" chains, although they recommend the inherently updated quality of an 8 or 9 speed chain.
Choose your size from the available options displayed in the drop down menu above. Each Surly cog is sold separately.
Weight : 40 - 70 grams
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