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BBinfinite Ceramitech Bearing 6806-BLK-ASMCT (30x42x7) / 4030-BLK-ASMCT (30x40x7)


If you have a BBInfinite bottom bracket that fits a 30mm or DUB spindle crank set, road or MTB, and the frame shell diameter is 46mm, you need the 6806 bearings. All 6806 kits ship with a set of bicycle crank bearings, two alloy bearing shields, stainless steel snap rings for BB30 applications, and a tube of Vibratite530 retaining compound.

If you have a BBInfinite module that fits a 30mm or DUB spindle crank set, road or MTB, and the frame shell diameter is 41mm or 42mm, you need the 4030 bicycle crank bearings. This bearing set ships with one pair of bearing shields and a tube of Vibratite530 retaining compound.


Product Details

Ceramitech Bearings: Our Si3n4 hybrid 6806 ceramic bearings feature ultra-spherical silicon nitride balls matched to SAE 52100 chrome steel bearing races that have been processed with additional heat treatment and polishing steps. The result is a hybrid-ceramic bearing that lasts longer than any steel bearing with spin performance no steel bearing can rival. Learn more about bike crank bearings on our blogs! We’re so confident in the durability of our Ceramitech bearings that we back them with a Lifetime Bearing Exchange warranty. These bicycle crank bearings feature mid-contact seals for extreme performance and durability. Each bearing comes lubricated with Kluber Isoflex Topas NB52. Lifetime warranty.

Parasitic drag is the enemy within any machine. Frictional losses pile on bit by bit, consuming effort that should be moving you forward. But in any ceramic bearing it’s not the balls that wear out, it’s the races, which soon fail, causing wattage-sapping drag. That’s why our Ceramitech bearing races are processed with additional melting and heat treatment steps. The result is a type of corrosion-resistant steel with a very uniform fine grain material structure that is then micro polished for an ultra smooth race channel. This process produces a bearing race set that is hard enough to resist ceramic-induced wear, and so smooth that there’s no good place for wear to begin. Like you we measure success by comparing distance over time. With BBInfinite and Ceramitech, you’ll go the distance time, and time again, faster, and faster still.


6806-BLK-ASMCT (30x42x7)
4030-BLK-ASMCT (30x40x7)

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