Wolf Tooth Tanpan Shimano AdaptorOffering the potential of a greater gear range and superior chain security, this adaptor enables you to run 10 speed Shimano MTB rear derailleurs with your 10 speed road shifters. This makes it ideal for riders who want to convert their drop bar set up to 1x. It works by amplifying your road shifter cable pull, giving you the potential to run a mountain bike rear derailleur. If you're looking to run a single chainring up front but with the gear range of a double - or want to retain a double and run super-low gears for ultra-steep hill mountain climbs, this is the upgrade for you.Easily installed in minutes and simply tucking above your rear derailleur, the Tanpan can be adjusted with its indexed barrel.CompatibilityCompatible with a wide range of road, gravel and cyclocross bikes.If your rear derailleur cable is routed internally through the chainstay and exits at the end of the chainstay above the axle or past the axle, you will need to use the inline version. This is because the Tanpan barrel adjuster end sits too close to the frame for the internally routed cable to exit the frame and enter the Tanpan barrel adjuster.Features: Use: MTB, Road, Gravel and Cyclocross Speed: Multiple options available to select separately Genuine Wolf Tooth spare partsBuy Wolf Tooth Components from Chain Reaction Cycles, the World's Largest Online Bike Store.