Engineered for ultimate drivetrain efficiency and unparalleled performance, integrating oversized pulley wheels with superior ceramic bearings.

The CeramicSpeed OSPW RS 5-Spoke system for Shimano 9250/8150 represents a pinnacle upgrade for your 12-speed electronic drivetrain. Designed to seamlessly integrate with Shimano's high-performance Ultegra R8150 Di2 and XTR M9250 rear derailleurs, this Oversized Pulley Wheel System significantly reduces friction in the drivetrain, delivering measurable watt savings and optimizing power transfer. Featuring lightweight, 5-spoke aluminum pulley wheels fitted with CeramicSpeed's ultra-low friction bearings, it ensures smoother shifting, extended component lifespan, and a tangible performance advantage for competitive road and mountain biking.

• Optimized for Shimano Ultegra R8150 Di2 and XTR M9250 12-speed rear derailleurs.
• Significantly reduces drivetrain friction, leading to watt savings and increased efficiency.
• Features oversized aluminum jockey wheels with a distinctive 5-spoke design.
• Equipped with CeramicSpeed's high-quality standard bearings for superior smoothness and durability.
• Ensures precise shifting performance and extended lifespan of the pulley wheels.