CeramicSpeed OSPW Alpha PW Pulley Wheel

Reliability refined. CeramicSpeed ALPHA Pulley Wheels bring CeramicSpeed's renowned low-friction bearing technology to a compact, stock-size pulley wheel system. Designed as a direct replacement for your original derailleur pulleys, ALPHA delivers smoother drivetrain performance, exceptional durability and CeramicSpeed efficiency without requiring an oversized cage or specialist installation. Designed for road, gravel and mountain bike use, ALPHA combines a lightweight one-piece moulded composite pulley wheel with CeramicSpeed hybrid ceramic bearings and patented ADR bearing protection. The result is a dependable drivetrain upgrade designed to perform consistently through dirt, rain, dust and demanding year-round riding. LOWER FRICTION. SAME FORMAT. CeramicSpeed's ALPHA Pulley Wheels reduce bearing drag by approximately 10–20% compared with stock pulley wheels, bringing CeramicSpeed's low-friction technology to your existing derailleur cage. Unlike an oversized pulley wheel system, ALPHA retains a stock-size architecture. There is no replacement derailleur cage and no major drivetrain modification required – simply replace the original pulley wheels with the appropriate ALPHA set. BUILT TO LAST At the heart of every ALPHA Pulley Wheel is a CeramicSpeed hybrid ceramic bearing combined with hardened stainless-steel races. The pulley body itself is moulded from lightweight composite polyamide to balance stiffness, durability and long service life. CeramicSpeed's patented ADR – Active Debris Remover protection system helps prevent contaminants reaching the bearing, improving protection against the dirt, dust and moisture encountered during real-world riding. ADR ACTIVE DEBRIS REMOVER The ALPHA pulley system uses dedicated stainless-steel ADR dust shields designed to actively protect the bearing from contamination. This makes ALPHA particularly well suited to riders looking for CeramicSpeed performance without sacrificing reliability in poor weather or off-road conditions. EFFORTLESS UPGRADE ALPHA Pulley Wheels are designed as a straightforward replacement for your derailleur's original pulley wheels. No oversized derailleur cage required No specialist tools required for standard installation Stock-size pulley wheel architecture Compatible with selected Shimano and SRAM drivetrains Suitable for road, gravel and mountain bike applications HAND-BUILT IN DENMARK Every ALPHA Pulley Wheel set is hand-built in Denmark using CeramicSpeed's hybrid ceramic bearing technology, delivering the smooth running and precise drivetrain performance for which CeramicSpeed is known. KEY FEATURES 10–20% lower bearing drag compared with stock pulley wheels CeramicSpeed hybrid ceramic bearings Patented ADR Active Debris Remover bearing protection One-piece moulded composite pulley wheel construction Hardened stainless-steel bearing races Direct replacement for original derailleur pulley wheels No replacement derailleur cage required Designed for road and off-road use Hand-built in Denmark CeramicSpeed Lifetime Warranty COMPATIBILITY ALPHA Pulley Wheels are available in drivetrain-specific versions. Select the version matching your rear derailleur before ordering. Current compatibility options include: SRAM RED / Force E1 SRAM RED D1 / Force D1 & D2 / Rival D1 & E1 SRAM XPLR E1 SRAM XPLR D1 SRAM Eagle XX1 / X01 AXS and XX1 / X01 / GX SRAM Transmission XX SL / XX / X0 Shimano Dura-Ace R9250 Shimano R8150 / R8050 / R7150 / R5800 Shimano R9150 Shimano GRX RX825 / RX820 Shimano GRX RX827 / RX822 and selected MTB 12-speed systems Shimano XTR M9100 Please check the exact model number of your rear derailleur before ordering. Compatibility varies between ALPHA Pulley Wheel versions. WHY CHOOSE ALPHA? CeramicSpeed's OSPW systems remain the ultimate option for riders seeking maximum drivetrain efficiency through larger pulley wheels and optimised cage spring tension. ALPHA takes a different approach: retaining the simplicity and compact dimensions of the original derailleur while substantially reducing bearing friction. For riders wanting a discreet, durable and easy-to-install CeramicSpeed drivetrain upgrade, ALPHA offers an impressive balance of efficiency, reliability and everyday usability. IN THE BOX 2 x CeramicSpeed ALPHA Pulley Wheels Drivetrain-specific ADR dust shields Installation components as supplied by CeramicSpeed CeramicSpeed ALPHA Pulley Wheels – CeramicSpeed performance, refined for everyday riding.