Wheels Manufacturing SOLO-SPEED Cog - 21t Fits SOLO-SPLINE SOLO-XD kits Purple CheckoutSpec= Addix Speedgrip } Designed for intensive training

} Designed for intensive training

Note that these chainrings are NOT compatible with SRAM 8-bolt direct mount cranksets

The low-profile design reduces weight minimizes snag points and provides a clean sleek look

Don't worry

Variable knurl pattern alternates from smooth to sharp texture for traction without irritation

Wheels Manufacturing SOLO-SPEED Cog - 21t Fits SOLO-SPLINE SOLO-XD kits Purple CheckoutSpec= Addix Speedgrip } Designed for intensive trainingCogs are designed with narrow wide alternating tooth pattern allowing for superior chain retention Cogs are optimized for use with Solo XD Carrier system only Will not work with 13spd Campagnolo chains or 12spd Shimano HG+ chains TECH SPECS model SOLO XD description SOLO XD replacement cog teeth 21 chain 9 12sp color purple