GIANT COG | SINGLE COG | 42T | SRAM | 10 SPD

- Extended range aluminum cog for those wanting 1x10 with a full range of gears
- Only fits Shimano XT/XTR 11-36t (M771/M980) or SRAM X5/X7/X9/X0 11-36t 10sp cassettes (not compatible with 2011 and older SRAM derailleurs)
- Requires removal of the 17T or 15T cog and spacer from existing cassette
- Longer B-screw (sold separately) only needed for about 50% of Shimano derailleurs
- May require a longer 10sp chain. Very tight fit on Stans 330 rear hub splines
- Designed and manufactured in the USA from 7075-T6 aluminum alloy