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RED - Shimano 10/11 Spd
BLACK - Shimano 10/11 Spd

Ceramic Speed
Oversized Pulley System Shimano 10/11 Spd

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CeramicSpeed's Oversized Pulley System frees up to 60% of the friction in your Shimano mechanical derailleur's pulley cage, leaving you with a savings of at least 2.4 watts. This incredibly smooth OSPW system was developed and handmade in Denmark using large 17T alloy pulley wheels that spin on ultra high-precision ceramic bearings. Every little bit counts when you're vying for the win, and CeramicSpeed makes sure nothing is left out on the road.


  • 17T alloy pulley wheels w/ ceramic bearings
  • Carbon-reinforced polyamide cage
  • Titanium mounting hardware
  • Handmade in Denmark
  • Efficiency claims verified by Friction Facts in Boulder, CO
  • 4 year warranty
  • Includes ceramic bearing oil
  • Claimed weight is approximately 70 g
  • Compatible with Ultegra/Dura Ace (6800/7800/7900/7970/9000/9070)