Ceramic bearings in derailleur pulleys sit directly in your drivetrain's rotational path, where reduced friction translates to measurable efficiency gains at race pace. CeramicSpeed manufactures this pulley set specifically for SRAM's XX1 and X01 Eagle rear derailleurs, using grade 3 silicon nitride ceramic balls that roll with less resistance than steel equivalents. The 14-tooth upper and lower pulleys maintain SRAM's stock tooth count and profile, so shifting performance stays identical to factory spec.

The bearing design matters here. CeramicSpeed uses their Coated bearing race treatment, which creates a smoother surface finish than untreated steel races. Combined with the ceramic balls, you get lower friction at the bearing interface and better longevity than hybrid ceramic bearings that skip the race coating. The sealed design keeps contamination out through wet rides and muddy conditions without requiring constant maintenance.

Installation mirrors a standard pulley swap. Remove your existing pulleys, transfer them to the new CeramicSpeed units using the included hardware, and reinstall with proper torque. The pulleys ship pre-greased and require no break-in period. Chain line and derailleur geometry remain unchanged since the pulley dimensions match SRAM's original specifications exactly.... Read More