Wheels Manufacturing SOLO-SPEED Cog - 19t Fits SOLO-SPLINE SOLO-XD kits Purple Model=Air IL Next Gen Rear Shock 6) Once the bar tape

6) Once the bar tape has been wrapped within the desired distance to the stem

Size 42t and larger will work with the Dura Ace 9100 power meter

Material:  6061 aluminum body

Dual-Seal crown race provides excellent seal efficiency with low friction

Wheels Manufacturing SOLO-SPEED Cog - 19t Fits SOLO-SPLINE SOLO-XD kits Purple Model=Air IL Next Gen Rear Shock 6) Once the bar tapeCogs 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 19 chain 9 12sp color purple