Jtek Engineering Shiftmate 8

Shimano Road 11-speed combined with MTB 11-speed: the Shiftmate 8 from Jtek Engineering
The Jtek Shiftmate adapts the transmission ratios of incompatible shift components to each other. The shifter cable runs through the Shiftmate, which uses a special shifting wheel to change the cable ratio and match the shift levers.
The Shiftmate 8 (Shiftmate Straight) lets you combine Shimano Road 11-speed STIs with Shimano MTB 11-speed rear derailleurs and cassettes or MTB 11-speed Rapidfire shifter grips with Shimano Road 11-speed rear derailleurs and cassettes. For example, you can build a 22-speed racing bike with STIs but with super-small gear ratios, or a 22-speed racing bike with Flat Bar STIs.
Jtek Engineering was founded in 2003 in the USA and is now based in Great Britain. It offers high quality and well thought-out products that can be used to solve compatibility problems in an elegant way.

Combinations:
Shifter:Shimano Road 11-speedRear Derailleur:Shimano MTB 11-speedCassette/Gearing:Shimano/SRAM/Campagnolo 11-speedShiftmate Derailleur Pulley Groove:small
Shifter:Shimano MTB 11-speedRear Derailleur:Shimano Road 11-speedCassette/Gearing:Shimano/SRAM/Campagnolo 11-speedShiftmate Derailleur Pulley Groove:largeFeatures:ideal for straight cable mount or mounting with cable stopsCNC manufacturedsealed ball bearinghard nickel-platedManufacturer Number:38754
Contents:1 x Jtek Engineering Shiftmate 8