CeramicSpeed OSPW RS Derailleur Pulley System - for Shimano Dura Ace 9250 / Ultegra 8150 - black SKU 113486

OSPW RS – Shifting Time
With the introduction of the Oversized Pulley Wheel system (OSPW) in 2015, CeramicSpeed has set standards in modern cycling. And with the Racing Sport (RS) models, the Danish-based manufacturer of high-quality hybrid bearings is once again at the forefront when it comes to taking the next step towards the future. A visibly updated design, innovative technical functions and more customization options are intended to provide a premium riding experience with the OSPW RS system, which combines the efficiency-enhancing properties of its predecessor with even greater balance and sophistication.


Technical details of the CeramicSpeed OSPW RS system
derailleur pulleys: aluminum with composite teeth, Alpha Disc design
bearings: hybrid (ceramic balls + stainless steel cups), handmade
cage: carbon fiber reinforced polyamide (PA), injection molded
tooth count: 13/19 (upper/lower pulley)
spring tension: adjustable (4 levels)
weight: approx. 101 g (manufacturer's specification)

With its modern look characterized by clear edges, the OSPW RS derailleur pulley system from CeramicSpeed fits seamlessly into the contemporary design trends of current bicycles and groupsets. However, the revised construction not only looks good, but also increases strength and durability thanks to the reinforced cage – for achieving an even higher level of quality.

On a functional level, the handmade OSPW system, consisting of a cage and an upper and lower pulley, remains true to itself. The combination of sophisticated technology and extremely low-friction hybrid bearings makes it possible to noticeably improve the overall efficiency of the drivetrain. In addition, the spring tension, which can be adjusted in 4 stages, enables an individual setup tailored to the riding conditions.

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