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

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.