The Negotiator.

The Tanpan makes Shimano 10- and 11-speed road shifters work with 10- and 11-speed mountain bike rear derailleurs.

Crossing boundaries and breaking down walls: the Tanpan brings the range and security of Shimano mountain rear derailleurs to Shimano-equipped drop-bar bicycles. This means a greater gearing range for bigger adventures, better chain security for rough terrain, and lighter weight and reduced complexity for the daily commute.

In order to deliver these benefits, the Tanpan amplifies road shifter cable pull to allow for seamless communication with mountain derailleurs. The result is ideal for riders looking to convert their road, gravel, cyclocross, or commuter bike to the simplicity and light weight of a single chainring – or for those whose riding demands lower gearing than a typical double can provide. With the addition of a clutch-equipped Shadow+ rear derailleur, the Tanpan provides unparalleled chain security for Shimano road drivetrains.

The 17g Tanpan installs in moments, tucking neatly above the rear derailleur and an indexed barrel provides for quick and easy cable adjustment. Each Tanpan is CNC machined in the USA by Wolf Tooth and comes fitted with precision stainless steel hardware and a sealed cartridge bearing.  

Specifications
Material:  6061 aluminum body, Delrin wheel, stainless steel bolt
Made in the USA   Wolf Tooth and Lindaret collaboration 

Compatibility
Compatibility: Works with most road, gravel, and CX bikes
Tanpan 11: Allows use of an 11-speed road shifter with an 11-speed mountain derailleur; compatible with 11-speed Shimano road shifters and optimized for 11-speed Shimano mountain derailleurs (including Dura-Ace 9100); compatible with Deore M5120 rear derailleur; required for Tiagra 4700 when paired with an 11-speed rear derailleur and 10-speed cassette; designed to mount directly to adjuster-free cable stops on Shimano rear derailleurs
Tanpan 10: Allows use of a 10-speed road shifter with a 10-speed mountain derailleur; compatible with Shimano M980, M780, M670, and M610 derailleurs; must be mounted inline for optimal performance; 10-speed Shimano mountain derailleurs may be used with slight decrease in shifting performance
Tiagra 4700: Compatible only when using Tanpan 11 with a corresponding 11-speed rear derailleur
Shimano ST-RX400-R GRX 10-speed shift levers: Use different cable pull; for proper shifting use Tanpan 11 with an 11-speed Shimano mountain rear derailleur and a 10-speed cassette

Mfr Claimed Weight
18g