Leonardi Shimano Pulleys

These pulleys are specifically engineered for Shimano 12-speed XTR, XT, and SLX rear derailleurs. They are not compatible with Shimano's 11-speed systems or other brands like SRAM.

Installation is straightforward and typically requires only a standard hex key set to remove the derailleur cage bolts. Ensure you keep track of the original spacers and washers, as you will need to reuse them during installation.

The 14-tooth configuration is designed to reduce chain friction and improve shifting precision compared to worn-out stock pulleys. Upgrading helps restore the crisp, responsive shifting feel that often degrades as original pulley teeth wear down over time.

You should replace your pulleys if the teeth have become sharp or pointed, or if you notice excessive side-to-side play in the pulley wheel itself. Worn pulleys often cause noisy drivetrains and sluggish shifting performance.

Yes, these 14-tooth pulleys are designed to be used in both the upper (guide) and lower (tension) positions of compatible Shimano 12-speed derailleurs.