Rear

Improve the performance of your 12-Speed Shimano XT/XTR rear derailleur with pulleys that reduce friction and increase bearing life. Ours are designed to work with less drag, adding to the power transmitted to the rear wheel.

The CeramicSpeed Pulley Wheels for Shimano XT/XTR offers a unique symmetrical 14-tooth narrow-wide design that provides exceptional shift performance. The narrow-wide design delivers precise engagement of the chain, both on and off the pulley wheels. The increased pulley size, compared to stock, reduces chain friction. The pulleys have a lightweight machined alloy body for durability and long life, and are developed, designed and handbuilt in Denmark. In the box: Two 14-tooth pulley wheels CeramicSpeed Bearing Oil in 15ml dripper bottle Sticker sheet

The CeramicSpeed Pulley Wheels for Shimano XT/XTR odders a unique symetrical 14-tooth narrow-wide design that provides exceptional shift performance. The narrow-wide design delivers precise engagement of the chain, both on and off the pulley wheels. The increased pulley size, compared to stock, reduces chain friction. The pulleys have a lightweight machined alloy body for durability and long life, and are developed, designed and handbuilt in Denmark.

The OSPW X for SRAM Eagle Mechanical features a narrow wide tooth profile to ensure durable chain retention. The 14 tooth upper and 18 tooth lower pulleys reduces chain drag while the custom designed carbon fiber pulley cage ensures both durability and light weight. The SRAM Eagle specific OSPW System is developed and designed in Denmark and comes with a 4-6 years warranty period. In the box: A complete OSPW X system for SRAM Eagle Mechanical CeramicSpeed Bearing Oil in a 15 ml. dropper bottle

CeramicSpeed's OSPW RS for SRAM RED and Force AXS has been lifted with a distinctly modern and angular design. The updated design brings balance and refinement to the OSPW RS System allowing it to blend seamlessly into the contemporary design trends of bikes and groupsets - making up the whole of which the OSPW System is part. Innovative tech features of the OSPW RS meets consumer demands for a premium ride experience. The design for the OSPW RS isn't solely a visual update. The cage itself has been reinforced to offer new levels of strength and durability. The CeramicSpeed OSPW RS System continues the tradition of providing optimization and increased efficiency of the rear derailleur through its extremely low-friction bearings and unique overall design. Injection Molded Carbon Fiber reinforced PA cage offers new levels of strength and durability Anodized aluminum 5-spoke 15-tooth upper and 19-tooth lower pulley wheels are light weight and durable Grade 3 Silicon Nitride ball bearings are 400% smoother, 128% harder and 58% lighter than standard steel balls normally used in the bicycle industry 2 customizable spring tension settings for optimal setup Compatible with SRAM Red and SRAM Force AXS 12-speed rear derailleurs

The Oversized Pulley Wheel System for SRAM Red and Force AXS features a 15-tooth upper and 19-tooth lower pulley wheel setting, for maximum efficiency. The handbuilt OSPW System has two spring tension settings, that allows customised setup based on riding conditions. This OSPW System is also compatible with the 2020 11 speed SRAM Red eTap derailleur featuring a clutch. Note; While there are visual similarities with the SRAM RED/Force AXS derailleurs, this OSPW system is not compatible with the SRAM Rival AXS, or SRAM RED, Force, or Rival XPLR eTap AXS rear derailleurs. Please see our Pulley Wheels for SRAM AXS Road In the box: Complete OSPW System for SRAM Red/Force AXS CeramicSpeed Pulley Oil, 15 ml. dropper bottle Custom tool for removal of stock cage and securing of OSPW System.

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

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 Robust cage crafted from polyamide and carbon fiber for durability and light weight Compact cage design allows the use of the same length chain as stock pulleys Two spring tension settings allow customized setup based on ride conditions Only compatible with 1X specific derailleurs - XTR M9100-SGS/GS and Shimano XT M8100-SGS Coated bearing races increase bearing service life by increasing hardness of race and reducing corrosion

CeramicSpeed's OSPW RS Alpha System for Shimano Road Dura-Ace R9250 and Ultegra R8150 have been lifted with a distinctly modern and angular design. The updated design brings balance and refinement to the OSPW System allowing it to blend seamlessly into the contemporary design trends of bikes and groupsets - making up the whole of which the OSPW RS Alpha System is part. Innovative tech features of the OSPW RS Alpha meets consumer demands for a premium ride experience. The design for the OSPW RS Alpha isn't solely a visual update. The cage itself has been reinforced to offer new levels of strength and durability. The CeramicSpeed OSPW RS Alpha System continues the tradition of providing optimization and increased efficiency of the rear derailleur through its extremely low-friction bearings and unique overall design. Injection Molded Carbon Fiber reinforced PA cage offers new levels of strength and durability Alpha disc pulleys are paired with a composite, narrow-wide tooth profile to help prevent debris from external objects getting stuck between the spokes The 13-tooth upper and 19-tooth lower Alpha pulley wheels feature ADR bearing protection that completely encloses the bearings Grade 3 Silicon Nitride ball bearings are 400% smoother, 128% harder and 58% lighter than standard steel balls normally used in the bicycle industry 4 customizable spring tension settings for optimal setup Compatible with Shimano Road Dura-Ace R9250 and Ultegra R8150 12-speed rear derailleurs Fits Brand: Shimano Fits Model: Dura-Ace R9250 , Ultegra 8150 Drivetrain Speeds: 12 Defined Color: Black

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 13-tooth upper and 19-tooth lower, aluminum pulley wheels with Grade 3 Silicon Nitride balls Robust cage crafted from polyamide and carbon fiber for durability and light weight Coated bearing races increase bearing service life by increasing hardness of race and reducing corrosion Two spring tension settings allow customized setup based on ride conditions Only compatible with SRAM Rival AXS 12-speed 36t cassette CeramicSpeed products with coated bearings include a lifetime warranty

The CeramicSpeed OSPW X ALPHA is a purpose-built oversized pulley wheel system for SRAM AXS XPLR E1 derailleurs. Engineered for gravel and mixed-surface abuse, it combines CeramicSpeed’s low-friction bearings with off-road sealing and a reinforced cage to deliver smoother shifting, reduced drivetrain drag, and long service intervals—exactly what XPLR riders demand. Oversized pulley architecture reduces chain articulation to lower drivetrain friction and improve efficiency under load ALPHA off-road sealing package enhances contamination resistance for dusty, muddy, and wet conditions Reinforced cage and CNC-machined pulley wheels maintain precise chain control over rough terrain Long-life grease specification and serviceable bearing system extend performance between maintenance intervals What’s Included OSPW X ALPHA cage assembly pre-fitted with CeramicSpeed bearings and oversized pulleys Small parts/hardware as required for SRAM AXS XPLR E1 fitment Lubricant/grease syringe for ongoing bearing service Setup and service instructions Key Features Off-road sealing – ALPHA disc-style protection and labyrinth sealing to keep out dust, sand, water, and grit Efficiency you can feel – oversized pulleys and premium ceramic bearings reduce drag while maintaining crisp shifts Shift stability – optimized tooth profile and cage stiffness improve chain wrap and retention on rough surfaces Serviceable longevity – bearing system is user-serviceable; long-life grease spec suits gravel and adverse weather Built for gravel – designed around the chainlines, cassette ranges, and chain types used by SRAM XPLR systems Compatibility Derailleur – SRAM AXS XPLR E1 (Force XPLR E1 / Rival XPLR E1) Drivetrain – 12-speed SRAM AXS XPLR 1x gravel systems using Flattop chain Cassette range – optimized for XPLR cassettes up to 10–44T Not compatible with SRAM Eagle/T-Type MTB derailleurs or non-XPLR road derailleurs Core Specs Pulley sizes – oversized upper and lower (typical OSPW geometry for reduced chain articulation) Cage material – reinforced alloy/composite construction for stiffness and impact resistance Pulley material – CNC-machined aluminum with CeramicSpeed ceramic bearings Finish – black, low-gloss, with subtle branding Maintenance – periodic re-grease per instructions; quick visual inspection after wet or dusty rides Installation Notes Direct replacement for the stock pulley cage on SRAM AXS XPLR E1 rear derailleurs Follow torque settings and B-tension guidance provided; confirm freewheel clearance at largest cog Recheck limit screws and indexing after installation; test shifting across full cassette under load Ideal For Gravel and adventure riders seeking lower drivetrain friction with reliable sealing for harsh conditions Racers who want consistent shifting and efficiency across long, dusty, or wet events Riders prioritizing serviceable, long-life performance from premium drivetrain components

This is an updated version of the Oversized Pulley Wheel System for Shimano 9100/9150 and 8000 SS/8050 SS. Mounting instructions for both this and the older version are to be found under our Support section. This new design has an integrated stop tower for easier mounting. The CeramicSpeed Oversized Pulley Wheels System has been proven to be the fastest pulley system in the world, providing energy savings starting from 2.4 watts over standard Shimano systems. The OSPW system for Shimano 9100/9150 and 8000 SS/8050 SS is an industry leading product, chosen by many of the world's leading cycling teams and professional triathlete's. Featuring a 13-tooth upper pulley wheel and a 19-tooth lower pulley wheel to provide absolute optimisation of the rear derailleur. The upper and lower oversized aluminium pulley wheels come fitted with either standard or coated CeramicSpeed Bearings. Please note: The OSPW System for 9100/9150 and 8000 SS/8050 SS is NOT compatible with Ultegra 8000-GS or 8050-GS (medium cage) derailleurs, nor with the clutch equipped Ultegra RD RX800 & RX805. Please see our OSPW X for Shimano RX800/805 for a compatible RX800 & RX805 version. For a compatible upgrade for Ultegra 8000-GS or 8050-GS please see our Pulley Wheels for Shimano, 11s NW. Please note while there is design similarities this OSPW is not compatible with the 12-speed Shimano 9200 or 8100 series derailleurs. The Shimano 9100/8000 OSPW system is compatible up to a 32 tooth cassette for both Dura Ace & Ultegra derailluers In The Box A complete 13-tooth/19-tooth OSPW System CeramicSpeed Bearing Oil in 15ml dropper bottle

CeramicSpeed's OSPW RS Alpha System for SRAM RED and Force AXS has been lifted with a distinctly modern and angular design. The updated design brings balance and refinement to the OSPW System allowing it to blend seamlessly into the contemporary design trends of bikes and groupsets - making up the whole of which the OSPW System is part. Innovative tech features of the OSPW RS Alpha meets consumer demands for a premium ride experience. The design for the OSPW RS Alpha isn't solely a visual update. The cage itself has been reinforced to offer new levels of strength and durability. The CeramicSpeed OSPW RS Alpha System continues the tradition of providing optimization and increased efficiency of the rear derailleur through its extremely low-friction bearings and unique overall design. - Injection Molded Carbon Fiber reinforced PA cage offers new levels of strength and durability - Alpha disc pulleys are paired with a composite, narrow-wide tooth profile to help prevent debris from external objects getting stuck between the spokes - The 15-tooth upper and 19-tooth lower Alpha pulley wheels feature ADR bearing protection that completely encloses the bearings - Grade 3 Silicon Nitride ball bearings are 400% smoother, 128% harder and 58% lighter than standard steel balls normally used in the bicycle industry 2 customizable spring tension settings for optimal setup - Compatible with SRAM Red and SRAM Force AXS 12-speed rear derailleurs

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 15-tooth upper and 19-tooth lower, titanium pulley wheels with Grade 3 Silicon Nitride balls - Titanium pulley wheels are 3D-printed and hollow for additional weight savings and durability - Robust cage crafted from polyamide and carbon fiber for durability and lightweight - Two spring tension settings allow customized setup based on ride conditions - Fits cassettes from 10 to 36-tooth - Coated bearing races increase bearing service life by increasing hardness of race and reducing corrosion - Compatible with SRAM Red AXS, SRAM Force AXS and 2020 SRAM Red eTap 11 speed derailleur with the orbit clutch. This system is also compatible with the wider range Force AXS medium cage derailleur - CeramicSpeed products with coated bearings include a lifetime warranty

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 15-tooth upper and 19-tooth lower, titanium pulley wheels with Grade 3 Silicon Nitride balls Titanium pulley wheels are 3D-printed and hollow for additional weight savings and durability Robust cage crafted from polyamide and carbon fiber for durability and light weight Two spring tension settings allow customized setup based on ride conditions Fits cassettes from 10 to 36-tooth Coated bearing races increase bearing service life by incre