WOLFTOOTH cartridge extension 40 teeth for Shimano
40 teeth for Shimano 10-speed XT and XTR - cassettes.
In exchange for the 17er or 15er pinion, this 40 teeth pinion an extension of the sprocket assembly. The shift aids are designed for the alignment of the teeth on a 36 tooth Shimanokassette.
The cassette extension is compatible with Shimano 10-speed cassette 11-36T XT (M771) and XTR 11-36T (M980). It is not compatible with SLX cassette.
Colors: black, silver, red, blue
Weight: 79 g