12 tooth narrow wide pulleys for Sram and Shimano - Fire Engine Red

Everyone knows the red ones are faster! Why do you think fire engines are red? Sirens and flashing lights not included.

Compatible with

- Sram 11 Speed X-Horizon derailleurs

- Shimano 10 and 11 speed mountain bike derailleurs

- in some cases, we can fit it on Shimano 11 speed road derailleurs, but it's a trial and error thing. Contact us before ordering, we have tested a lot of combinations.