Wheels Manufacturing SOLO-SPEED Cog - 21t Fits SOLO-SPLINE SOLO-XD kits BLK Thickness-3.5mm Versatility and functionality are the

Versatility and functionality are the Brensholmen jacket's main attributes

This is for use on bikes with 135mm QR

Less volume for slim feet or more space for growing feet

Highly functional vest with windproof front and elastic

Wheels Manufacturing SOLO-SPEED Cog - 21t Fits SOLO-SPLINE SOLO-XD kits BLK Thickness-3.5mm Versatility and functionality are theCogs 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