ceramic gears CeramicSpeed OSPW RS Alpha Disc oversized pulley wheels kit for Shimano  9250/8150 – EMINENCE CYCLE CO
SKU: 18906679762
ceramic gears

ceramic gears CeramicSpeed OSPW RS Alpha Disc oversized pulley wheels kit for Shimano 9250/8150 – EMINENCE CYCLE CO

Sale price$25.50 Regular price$28.33
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Ships within 48 hours · Estimated delivery Jul 3 - Jul 8

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Description

ceramic gears CeramicSpeed OSPW RS Alpha Disc oversized pulley wheels kit for Shimano 9250/8150 – EMINENCE CYCLE COUnleash RealWorld Speed Gains with CeramicSpeed OSPW RS Alpha Disc For cyclists who demand uncompromising performance from every pedal stroke, the CeramicSpeed OSPW RS Alpha Disc is a raceengineered upgrade designed to transform your drivetrains efficiency and aerodynamic profile. Built specifically for Shimano 9250 8150 Di2 12speed disc brake derailleurs, this oversized pulley system delivers a tangible edge whether you're chasing marginal gains on

Unleash RealWorld Speed Gains with CeramicSpeed OSPW RS Alpha Disc

For cyclists who demand uncompromising performance from every pedal stroke, the CeramicSpeed OSPW RS Alpha Disc is a raceengineered upgrade designed to transform your drivetrain’s efficiency and aerodynamic profile. Built specifically for Shimano 9250/8150 Di2 12speed disc brake derailleurs, this oversized pulley system delivers a tangible edge whether you're chasing marginal gains on time trial courses or seeking smoother, faster rides across rolling UK roads.

Developed in partnership with elite athletes and trusted by WorldTour pros, the RS Alpha Disc features 15T upper and 19T lower pulley wheels mounted within a robust, carbonreinforced polyamide cage. The aerodynamic carbon disc cover is shaped to reduce rear derailleur drag — an innovation born from wind tunnel testing and realworld racing feedback.

At its core are CeramicSpeed’s premium lowfriction bearings, enabling reduced drivetrain resistance and maximised power transfer. Every watt saved counts — and the RS Alpha Disc is precisionbuilt to deliver measurable performance improvements over standard pulley systems. 

Key Performance Features

Optimised for Shimano 9250/8150 Di2: Designed for 12speed disc brake systems with full electronic shifting.
15T/19T Oversized Pulley Wheels: Reduce chain articulation and drivetrain resistance under load.
Aerodynamic Carbon Disc Cover: Minimises drag at the derailleur cage for improved aero efficiency.
CeramicSpeed Bearings: Proven lowfriction technology trusted by pro cycling teams worldwide.
Lightweight CarbonReinforced Cage: Durable and stiff under torque, yet light for responsive handling.
 

Why Upgrade?

Every watt matters. Whether you're targeting podiums, segment PRs or simply elevating your ride quality, the RS Alpha Disc unlocks performance you can feel and measure. Its visual design complements the sleek lines of your Shimano Di2 setup, while the internal mechanics silently deliver enhanced responsiveness and efficiency.

Trusted by Pros. Available in the UK.

Now in stock at Eminence Cycle Co, UK riders benefit from genuine CeramicSpeed components, local customer support, and rapid shipping. As an authorised UK retailer, we ensure every RS Alpha Disc arrives fully packaged, performanceready, and supported with expert advice.

Ready to ride faster?
Unlock More Speed Today, Wherever You Are in the UK

Compare with Standard Pulleys – See the difference in drivetrain drag.
View Technical Specifications – Full details on materials, weights and compatibility.
Ask an Expert – Chat with our UK-based support team for personalised advice.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 18906679762

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