SKU: 110908

OSPW Aero for Shimano 9100 and 8000

Save 25%
Sale price$799.00
Finish: Coated
Color: Black
Lifetime warranty
Durable and serviceable design
Lowest friction
Exceptional corrosion resistance
RS 5-Spoke
RS ALPHA Team Edition
Notify me when available
Sale price$799.00

Product description

The world’s fastest Pulley Wheel system just got faster. OSPW Aero features a lifetime warranty and is wind-tunnel tested to have 40% less friction compared to a stock derailleur, making it perfect for time trials or triathlons.

The OSPW Aero is an industry-leading product co-developed with one of the world’s leading aerodynamicists; Simon Smart and is chosen by World Champions and top athletes around the world. This OSPW system has handbuilt CeramicSpeed Bearings installed and its unique design and craftsmanship will captivate you from the first time you use it.

The system features a 13-tooth upper Pulley Wheel and a 19-tooth lower Pulley Wheel to provide absolute optimisation of the rear derailleur and the upper and lower oversized aluminum Pulley Wheels come fitted with coated CeramicSpeed Bearings that have been perfected through years of experience.

The OSPW Aero for Shimano 9100 and 8000 has an integrated stop tower for easier mounting.

This is an updated version of the Oversized Pulley Wheel System for Shimano 9100/9150 and 8000 SS/8050 SS. 

Please note: The OSPW Aero 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 Aero is not compatible with the 12-speed Shimano 9200 or 8100 series derailleurs.

The Shimano 9100/8000 OSPW Aero system is compatible up to a 32 tooth cassette for both Dura Ace & Ultegra derailluers.

In The Box

  • Complete 13-tooth/19-tooth OSPW Aero System
  • CeramicSpeed Oil for Pulley Wheel Bearings, 15ml. dropper bottle
Compatibility Matrix Installation Guide
Road and Tri
Net weight
98.0 g
Gross Weight
164 g
Pulley Material
Derailleur Brand
Derailleur Model
Dura Ace 9100 Mechanical, Dura Ace 9150 Di2, Ultegra 8000 SS Mechanical, and Ultegra 8050 SS Di2

Reduces aerodynamic drag on the rear derailleur by up to 60%

Co-developed with Drag2Zero

Reduces friction by 35-40% over stock pulley configuration


How to maintain the OSPW Systems

Shimano 9100/9150 and 8000/8050 with integrated stop tower

Compatible with:

  • Shimano 9100/9150 and 8000 SS/8050 SS - NOT compatible with R8000 GS
  • This OSPW System is NOT compatible with the Shimano 105 7000 series derailleur

OSPW Aero for Shimano Dura Ace 9100 and Ultegra 8000

Compatible with:

  • Shimano Dura Ace 9100, 9150
  • Ultegra 8000 SS, 8050 SS

You may also like