Are Kogel 12/12T Pulleys Right for Your Drivetrain?

Kogel's 12/12T Oversized Derailleur Pulleys are a meaningful friction upgrade for riders on 11-speed or 12-speed drivetrains who want more than the plastic stock pulleys they came with. Built with CNC-machined aluminum cogs instead of injection-molded plastic, these wheels are notably more durable under real-world conditions, especially on gravel and cyclocross bikes where contamination and impact are constant concerns. Each pulley runs on the same ceramic bearings Kogel uses in their bottom brackets, bringing the same precision and low-drag performance to the rear derailleur that you'd expect from a full BB upgrade.

Compatible with Shimano 11-speed and Campagnolo 12-speed derailleurs, as well as SRAM eTap 11 and 12-speed, these pulleys cover a wide range of drivetrains without compromise. The oversized 12-tooth diameter reduces chain wrap angle and distributes load more evenly across each tooth compared to standard 10 or 11-tooth pulleys, producing smoother shifts and less drivetrain wear over time. Whether you're upgrading a dedicated race bike or a do-everything gravel rig, these pulleys are a smart, durable first step toward a faster drivetrain.