Ideal solution for riders looking to convert their road, gravel, cyclocross, or commuter Shimano drivetrain bike to a single front chainring, without giving up the gear range of a double. Also great for riders with double chainring bikes that want lower gearing for those ultra steep climbs *Conceived by Lindarets and developed with Wolf Tooth Components *Offsets the position of your Shimano road derailleur to make it possible to run a wide-range mountain bike style cassette *Compatible with most 10 and 11 speed Shimano road derailleurs and shifters *The RoadLink is optimized for use with ten or eleven-speed 11-36t and 11-40t cassettes and works great with Wolf *Tooth&&';;s 40-tooth Giant Cogs and Drop-Stop chainrings *Installs in minutes *Mounts to standard derailleur hangers *Double chainring setup must use medium cage derailleur Triple chainrings are not supported Due to the lack of a clutch mechanism on Shimano road derailleurs, secondary chain retention may be needed Material: 6061 aluminum with stainless steel bolt Made in the U.S.A. Weight: 17 g.