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 14-tooth upper and 18-tooth lower, aluminum pulley wheels with Grade 3 Silicon Nitride balls to provide absolute optimization of the rear derailleur
• The narrow wide tooth profile ensures durable chain retention
• Robust cage is crafted from carbon reinforced polyamide for durability and light weight
• Three spring tension settings allow you to customize performance and reduce chain drag
• Fits 10-50 tooth cassette range
• Coated bearing races increase bearing service life by increasing hardness of race and reducing corrosion