CYCLINGCERAMIC derailleur pulleys for Shimano Dura Ace 9250 / Ultegra 8150 12-speed | red
Founded in 2012 by French cyclist Héloise Proust, Cyclingceramic is committed to ensuring that every watt you put on the pedals is converted into propulsion. At their company headquarters in France, they manufacture high-quality ceramic ball bearings for a wide range of bike components by hand. The company relies on sourcing all components from European suppliers. In addition to individual ball bearings, the French also produce a large selection of oversized derailleur cages, derailleur pulleys and bottom brackets to help you improve your performance on the bike. Convinced of the high quality of their products, Cyclingceramic gives you a 4-year guarantee on their bearings.
With up to 800 revolutions per minute, it is obvious that frictional resistance can be saved on derailleur pulleys. The Cyclingceramic pulleys are milled in France from 7075 aluminium, then anodized and decorated with the brand logo. Until they were ready for the market, each pulley underwent extensive testing until the shifting performance and durability met Cyclingcermic's high quality expectations. One detail integrated into the testing process is the slightly beveled tooth profile of the lower derailleur pulley, which is intended to improve chain guidance. The Cyclingceramic pulleys were able to prove their efficiency on the renowned Friction Facts test bench, where they were among the fastest with a measured resistance of 0.33 watts.
Ceramic bearings
The ceramic balls used by Cyclingceramic are made from high-quality grade 3 silicon nitride. Compared to conventional steel balls, they are 58% lighter, 12% harder and 68% stiffer. In addition, the roundness is 75% higher. The outstanding properties of the ceramic balls not only reduce frictional resistance to a minimum, they also make the bearings more durable. At Cyclingceramic, each ball is precisely inserted by hand into the hardened steel raceways manufactured in Switzerland. The balls are held in place by lightweight, corrosion-resistant polyamide cages. The non-contact seals reduce frictional resistance and still protect the bearings against the ingress of dirt and moisture. During the production process, each bearing is checked several times to ensure that all components fit perfectly.
The oil included in the scope of delivery is used for maintenance and has been specially adapted to these bearings. Lubricants from other manufacturers are not recommended.
Technical data:
Material: Aluminum 7075
Number of teeth: 11 bottom, 11 top
Bearings: handmade ceramic bearings with grade 3 ceramic balls
Compatibility: Shimano Dura Ace 9250 / Ultegra 8150 12-speed
Color: red
Weight according to manufacturer: 26g
Weight self-weighed:
Scope of delivery:
1x CyclingCeramic derailleur pulley set for Shimano Dura Ace 9250 / Ultegra 8150 12-speed | red
1x CyclingCeramic bearing oil 15 ml
1x manual
1x sticker sheet
Mounting instructions
Maintenance
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