CeramicSpeed OSPW RS 3D Titanium V3 SRAM Red AXS D1/E1 and Force AXS D1

The CeramicSpeed OSPW RS 3D Titanium V3 SRAM Red AXS D1/E1 and Force AXS D1 replaces the stock pulley cage on SRAM's Red and Force AXS derailleurs with an oversized pulley wheel system built around 15-tooth and 19-tooth pulleys instead of the smaller stock wheels. The larger diameter reduces how sharply the chain has to bend as it passes through the derailleur, which is the core idea behind oversized pulley systems in general — less chain articulation means less friction lost to the drivetrain.

What sets this version apart is the pulley construction itself: the wheels are 3D-printed titanium, built hollow to keep weight down while still handling the loads a derailleur cage sees under hard shifting and sprinting. CeramicSpeed's complete system weighs in at roughly 86 grams, and the bearings inside are hand-built with adjustable spring tension so the cage can be tuned for chain tension rather than running one-size-fits-all. CeramicSpeed states this configuration reduces drivetrain friction by 35 to 40 percent versus a stock pulley setup — a manufacturer figure worth noting as their claim rather than an independently tested one, but it's consistent with the broader case for oversized pulley systems.

CeramicSpeed's Active Debris Remover (ADR) technology is built into the bearing seals here, using an enclosed dust cover paired with a bladed groove structure that flings grit and water out as the pulley spins rather than letting it work its way in. That matters more on an oversized pulley system than almost any other drivetrain part, since the pulleys are low to the ground and catch everything the road throws up. The V3 update also reworks the cage interface for a cleaner installation, so mounting the system to a Red or Force AXS derailleur is more straightforward than on earlier versions.

This is a system built for riders who've already dialed in the rest of the drivetrain and are chasing marginal gains — racers, time trialists, and serious club riders who know exactly what they're upgrading and why. It's available in Silver and an Oil Slick PVD-coated finish, and CeramicSpeed backs the complete OSPW RS system with a lifetime warranty. It's not a budget upgrade, but it's aimed at the rider who's already decided that every watt matters.