The CeramicSpeed Oversized Pulley Wheel System provides optimization and increased efficiency of the rear derailleur through its extremely low-friction bearings and unique overall design.

• The CeramicSpeed Oversized Pulley Wheel System provides optimization and increased efficiency of the rear derailleur through its extremely low-friction bearings and unique overall design.
• Features a 13-tooth upper pulley wheel and a 19-tooth lower pulley wheel to provide absolute optimization of the rear derailleur
• Robust cage crafted from polyamide and carbon fiber for durability and light weight
• Includes hardened steel bearing races
• Compatible with Record mechanical, Record EPS, Super Record mechanical, Super Record EPS, Potenza mechanical, and Chorus (fits up to 32t cassette)