It doesn't matter if you value a lightweight climbing bike or an aero speedster, drivetrain friction causes drag at any speed, and thus more watts if you want to go faster. And while it’s harder to quantify frictional losses compared to say, aero data in the wind tunnel or grams on a scale, if you are looking for every ounce of high-performance and want to go as fast as possible with the least amount of wattage expenditure, ceramic bearings in bigger derailleur pulleys makes plenty of sense. Take a look at some of the GC leader's bikes, especially on important TT stages. Many will be running CeramicSpeed's Oversized Pulley Wheel System, sponsor correct or not, to go as fast as they can when it matters most. Now, you too can enjoy the benefits the pros count on when drivetrain friction isn't tolerated during your own rides and races.
|Material||[cage] nylon, carbon fiber, [pulleys] aluminum|
Shimano Ultegra R6800/6870, Dura-Ace R9000/9050
|Recommended Use||road cycling, triathlon, time trial|
|Manufacturer Warranty||4 years|