Enduro Zero Grade 3 Ceramic Bearings for Trek Madone

Enduro Zero Ceramic Bearings from ABI. These are by far the best bearings ever created for cycling. We worked with Enduro to bring you the fastest, best performing bearing available. 

Grade 3 US made silicon nitride ceramic balls
ABEC 5 Precision
Hardened cryogenically treated chrome steel bearing surfaces
Magnetite corrosion proof coating (except on the high polished bearing surfaces)
Polyamide nylon retainers
Super low friction silicone VV double lip seals
Kyudo Yushi PS2 grease with 60-70% fill rate.

Dimension: 30 x 42 x 7

Fits Trek Madone with BB90. Includes Trek specific seals and 2 bearing cartridges for left and right side.