The way it attaches, the geometry, and even the tooth count vary depending on the derailleur brand and model it’s designed for.Another view of the CeramicSpeed OSPW for newer Shimano 11-speed road rear derailleurs.
However, in the pursuit of marginal gains, Poertner did say it’s a product he’s recommended to teams, at least for use in time trials.The exact configuration depends on derailleur geometry and just how much CeramicSpeed believes the limits can be pushed before shift performance suffers.“We must also not rule out the depth [to] which standard-sized pulley wheels hold cross-compatibility for many derailleur models. Or feel free to continue reading the article.Retailing from US$500/AU$650 for what’s effectively a carbon fibre derailleur cage and ceramic bearing-equipped aluminium pulley wheels, CeramicSpeed’s OSPW (OverSized Pulley Wheel) system is immediately one of the most polarising speed pursuit upgrades. Still, there’s something extremely satisfying about the smoothness provided through a sum of efficient parts – and the OSPW was certainly a contributor toward that.CeramicSpeed is best known for its fast bearings, which are of course included within.All of this begs the question: why do the likes of Shimano, SRAM, and Campagnolo stick with small pulley wheels when the data suggest they’re not the best way?Small ports are provided near the center of the pulleys for easy bearing/seal lubing.“In general, with the [regular] CeramicSpeed bearings, you can bring them back to life as the races and bearings don’t get surface rust on them,” said Zach Edwards of the Boulder Gruppetto workshop, in Boulder, Colorado. In reality, with an optimised or even well-maintained chain in use, that figure is likely closer to just 1-2W – but still, watts are watts.Out of the box, the OSPW bearings run on light oil, and CeramicSpeed provides a small bottle of lubricant to keep the bearings running smooth. The cage has small lube ports built-in, although removing the pulleys to access the bearings and seals is better. A new Shimano Ultegra groupset is said to cost approximately 20W when pedalled at 250W (90rpm)* — in other words, your rear tyre receives 92% of what you put into the pedals. $10.98.
We can say with certainty and based on data, that it’s not because smaller pulley wheels are more efficient.Our mission is to bring you the best content in the world that showcases the beauty of cycling in all its glory. 1-800-727-2453; Live Chat; ... Shop for Pulley Wheels Derailleurs & Parts at Performance Bicycle Shimano Pulley Wheels Derailleurs & Parts. On this website we use cookies to provide better user experience. We want to inspire people to love the sport as much as we do, and ultimately pull you away from the computer to get out for a ride.In addition, a larger pulley wheel spins slower for a given cadence, and in this case, each pulley also runs on premium hybrid ceramic bearings with light-contact seals and a low-friction oil. Once installed, you’ll need to remove the cage in order to change it.Still, if you’re in the pursuit of marginal gains and spending $500 to save a couple of watts seems like the next step, then the OSPW is exactly for you. And CeramicSpeed’s ceramic bearings are famously durable, too.The OSPW offers three tension settings. Search. The Ceramic Speed derailleur pulleys are the same price as a Dura Ace 7900 derailleur itself, and nearly three times the cost of the 105 part one would drop them into!
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