Wheels Manufacturing SOLO-SPEED Cog - 21t Fits SOLO-SPLINE SOLO-XD kits Purple MFPN=521 May not be compatible with

May not be compatible with all brake calipers due to 2mm thickness Hub/Disc Compatibility Center-Lock Pad Compatibility All Pad Compounds Rotor Size (mm) 220 Rotor Type One Piece keyword search SRAM HS2 Rotor Size 220Mm Hub Disc Compatibility Center-Lock

Fits Presta & Schrader valves

11 speed road cassettes with Sunrace`s Super Fluid Drive technology

Fits 7/8` (22

strength and durability

Wheels Manufacturing SOLO-SPEED Cog - 21t Fits SOLO-SPLINE SOLO-XD kits Purple MFPN=521 May not be compatible withWheels Mfg. SOLO XD and SOLO SPLINE Single Speed cogs are constructed with high end 7075 aluminum and designed with narrow to wide alternating tooth pattern allowing for superior chain retention. Cogs are optimized for use with Wheels Mfg. SOLO XD XD XDR and SOLO SPLINE Single Speed Conversion kit carrier systems only. Crafted with high end 7075 aluminum for light weight and extreme durability Cogs are optimized for use with Wheels Mfg. SOLO XD XD XDR