Wheels Manufacturing SOLO-SPEED Cog - 21t Fits SOLO-SPLINE SOLO-XD kits BLK MFPN=Y1P498080 Features gel on the inner

Features gel on the inner side for comfort even without gloves

Pointed half-round precision jaws with knurled working surfaces for secure hold

Rotor Size (mm) 203 Pad Compatibility All Pad Compounds Rotor Type Two Piece Weight 147 Hub/Disc Compatibility Center-Lock

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Wheels Manufacturing SOLO-SPEED Cog - 21t Fits SOLO-SPLINE SOLO-XD kits BLK MFPN=Y1P498080 Features gel on the innerCogs 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 black