The Oversized Pulley Wheel (OSPW) System for Shimano 9100/8000 is an industry leading product, chosen by many of the world's leading cycling teams and professional triathlete's.
This OSPW System features 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.
This specific system is compatible with Ultegra 8000-SS/8050-SS/8050-GS mechanical and Di2 rear derailleurs and Dura Ace 9100-SS/9150-SS mechanical and Di2 rear derailleurs. This system is not compatible with Ultegra 8000-GS (long cage) rear derailleurs.
Pulley Wheels: CeramicSpeed 13-tooth upper and 19-tooth lower
Pulley Wheel Material: Titanium
Cage Marterial: Carbon reinforced PA
Bearing Options: CeramicSpeed Coated Bearings
CeramicSpeed Pulley Wheel Oil, 15 ml. dropper bottle
Compatibility: Shimano 9100/91050 & 8000/8050
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.
Compatibility Cassette: Fit cassettes up to a 11-32 range
Spring Tension Settings: 4 spring
Speed: 11 speed
Discipline: Road and Gravel/Cross
Regarding the maintenance of your OSPW System, it is important that you properly lubricate your bearings in order to ensure optimal performance and maximum longevity. Add oil by using the lubrication points on the back cage plate, so that oil can penetrate the bearing. Do this when you lubricate your chain, if you have washed your bike or after riding in wet or muddy conditions.