Brand New Blackspire ReCOGnition 45 Tooth Cog Extender - Black Anodized

Includes 18 tooth Cog, Spacer and B Tension Screw

Blackspire's product description: "Great addition to your 1x drive train, with just the swap of one cog to your existing 10 speed cogset. Increases range to your drive train without breaking the bank."

For Shimano XT M8000 and XTR M9020

CNC'd from 7075 T6 Aluminum

This is Brand New inventory

weight is 110 grams