>>The overall power savings of the OSPW System for Shimano 9100/9150 /8000 reach 30%-60%, or more in some cases, over a stock. CeramicSpeed Oversized Pulley Wheel System OSPW for Shimano R8000/R9100 11 Speed.OSPW System for Shimano 8000 SS/8050 SS and 9100/9150. >> 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 overall power savings of the OSPW System for Shimano 9100/9150 /8000 reach 30%-60%, or more in some cases, over a stock setup.>> The oversized pulley wheels have 3-5 times longer lifetime than the commonly used standard pulleys on the market. 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. The Shimano 9100/8000 OSPW system is compatible up to a 32 tooth cassette for both Dura Ace & Ultegra derailleurs. All of your order will be checked carefully before pack. If the item is defective within 1 year due to quality issue, we will repair or replace it for free(according the products). +8 Monday to Saturday 8:30-18:00. This item is in the category "Sporting Goods\Cycling\Bike Components & Parts\Rear Derailleurs". The seller is "bucklos-sellect" and is located in this country: GB. This item can be shipped to United Kingdom.