
CLOSEOUT - Shimano 10 Speed Extender Cog - 40T
Great Shimano cassette Extender and 13T lockring for users who require that one more, extra sprocket on steep climbs. Very simple to install, it fits behind 11-36 cassettes, displacing one sprocket from the main cluster. Size (Mass +/-1g): 40T (75g) Color Black, (Racing Red- soon) Compatibility SLX * (CS-HG81-10 11-36), XT (CS-M771-10 11-36), XTR (CS-M980-10 11-36) 10 speed only. Material cnc machined 7075 Txxx Aluminum. Long-lasting construction Finish type II anodizing Rear derailleur must be used with medium or long cage. medium cage recommended. How to mount the 40T expander: There are two ways to fit 40T sprocket to your drivetrain. You can remove the stock 17T sprocket and one spacer from your cassette, then put 40T on the freehub and mount everything else back (except 17T). OR, by removing 11T sprocket. Second option is a lot better in our opinion, but requires our special lockring to hold 13T sprocket (lockring is available in options). I