MTB Bike Rear Derailleur Jockey Wheel 11T 13T 17T Ceramic Bearing Pulley Road Bike Guide Roller Idler With Pulley Screw 4/5/6mm

Bicycle Rear Derailleur Ceramic bearing

Pulley Jockey WheelAll the results of the simulations and the experimentations indicated that the ceramic ball bearings' performances are very good, especially in the low load and high-speed environment.Size:11TStructure: Ceramic bearingMaterial: aluminum alloy 7075Color: Black/Red/Blue/GreenWeight: about 9.1gFit for 4/5/6 MM roller screw axisApply for most of rear derailleur on the market

11T

About Premium Hybrid Ceramic Bearing

bearings feature rolling balls made of a ceramic material. The rolling balls are constructed of silicon nitride or zirconia ceramics.Using ceramic bearings in hubs, bottom brackets, and pulleys will reduce friction. By reducing the coefficient of friction, you can accelerate faster and maintain speed with le power input.Benefits of ceramic bearings:Ceramic bearings have 10% le friction than steel bearings.Bearings are extremely wear resistant because ceramic material is much harder than the hardest steel bearings.Silicon nitride balls are 60% than steel balls.Safe operation even when using low amounts , which reduces the viscous drag friction from .When used with special seals and lubrication, the friction in ceramic bearings can be 20-30 times lower than steel bearings with standard friction seals and standard lubrication.There are different types of ceramic bearings on the market, such as full ceramic bearings, steel ceramic bearings and nylon ceramic bearings. Full ceramic bearings make use of both ceramic balls and race. These bearings are impervious to corrosion and rarely require lubrication if at all. Due to the stiffne and hardne of the balls and race these bearings are noisy at high speeds. The stiffne of the ceramic makes these bearings brittle and liable to craunder load or impact. Because both ball and race are of similar hardne wear can lead to chipping at high speeds of both the balls and the race this can cause sparking. So, instead of the full ceramic bearings, the best solution for bicycle is hybrid bearings.use hybrid ceramic bearings for high-end applications. Compared to all steel bearings, they have lower friction, weight and longer service life. They are also le susceptible to failures caused by dirt, dust and poor lubrication.

13T

17T