Why Do MTB Riders Choose the CeramicSpeed OSPW X?

The CeramicSpeed OSPW X Pulley Wheel System is purpose-built for SRAM Eagle AXS derailleurs, bringing the oversized pulley efficiency of CeramicSpeed's road pedigree to the demands of cross-country and trail riding. A narrow-wide tooth profile on both the 14-tooth upper and 18-tooth lower pulleys ensures reliable chain retention across aggressive terrain, while the custom-designed carbon fiber pulley cage keeps weight low and rigidity high under real-world trail loads. The result is a rear derailleur upgrade that reduces chain drag measurably while holding up to the abuse of off-road use.

Developed and designed in Denmark, the OSPW X is compatible with all SRAM Eagle AXS rear derailleurs and carries the same obsessive engineering approach that has made CeramicSpeed bearings the choice of WorldTour road pros. The ultra-low-friction bearing package inside each pulley wheel reduces drivetrain resistance across the cassette, delivering cleaner power transfer on climbs and technical singletrack. Standard versions come with a 4-year warranty, and coated versions are backed by a lifetime warranty, making this a long-term investment in your drivetrain's performance whether you are racing XC or pushing big gravel miles.