Jtek Engineering Shiftmate 9

SRAM Road 11-speed combined with MTB 11-speed: the Shiftmate 9 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 9 lets you combine SRAM Road 11-speed shifters with SRAM MTB 11-speed rear derailleurs. For example, you can build a 22-speed road bike with SRAM road shifters, but with a very small gear ratio.
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 9-speedRear Derailleur:CampagnoloCassette/Gearing:SRAM/Shimano 9-speedShiftmate Mount:rear derailleur
Shifter:Shimano Road 10-speed, Shimano MTB 10-speedRear Derailleur:Shimano 10-speedCassette/Gearing:Campagnolo 9-speedShiftmate Mount:rear derailleur
Shifter:SRAM Road 11-speedRear Derailleur:SRAM/Shimano 11-speed or MTB 12-speedCassette/Gearing:Shimano/SRAM/other brands 11-speedShiftmate Mount:rear derailleur
Shifter:Shimano/SRAM/Campagnolo 11-speedRear Derailleur:for 11-speedCassette/Gearing:Shimano/SRAM 9-speedShiftmate Mount:rear derailleur
Shifter:Shimano/SRAM 8-speedRear Derailleur:for 8-speedCassette/Gearing:Shimano/SRAM 9-speed (one sprocket missing)Shiftmate Mount:shifter
Note from the manufacturer:
The Shiftmate 9 does not allow the use of 11-speed MTB shifters with Road derailleurs.
Features:CNC manufacturedsealed ball bearinghard nickel-platedcompact designManufacturer Number:41501
Contents:1 x Shiftmate 9