Chain articulation through the derailleur cage is where friction quietly builds up on every pedal stroke, and it's also where grit and road spray tend to work their way into bearings. CeramicSpeed built the ALPHA Pulley Wheels to attack both problems at once. These are a stock-size upgrade, meaning they drop straight into your SRAM rear derailleur without changing the cage or oversizing the pulleys, so you get the bearing and durability improvements without altering shift feel or geometry.

The body is a one-piece molded composite rather than machined alloy, which keeps weight down and gives the pulley a clean, minimal look. Inside, CeramicSpeed runs its low-friction ceramic bearings, and the whole assembly is protected by the brand's patented ADR technology. ADR uses a sealed dustcover anchored into the pulley plus a bladed groove structure that flings debris away while the pulley spins, which is what makes these suitable for both road and off-road use.

These come matched to specific SRAM derailleur families, so getting the right variant matters. Confirm your exact derailleur generation before ordering. The ALPHA line covers SRAM Red D1, Force D2/D1, Rival E1/D1, SRAM Red E1/Force E1, XPLR D1 and E1 groups, plus SRAM Transmission and Eagle drivetrains depending on the version. If you're unsure which generation you're running, the team at Excel can match your derailleur to the correct set.... Read More