CERAMIC HYBRID BEARING KIT FOR OUTBOARD BOTTOM BRACKETS

The "CH" Series bearings match the hardest ceramic balls with the hardest available races. This means no soft stainless steel races. The races are hardened chromium steel, cryogenically treated and polished to make them the best possible match for the Grade 5 ceramic balls. Ball "grade" is a measure of roundness. The smaller the number, the more perfectly round the ball. By way of comparison, a Dura-Ace ball bearing is typically a Grade 25.

Upgraded cup seals are also included. The large OD (41mm) silicone seals will fit most mountain and road cups. The smaller OD (37mm) seals are for certain cups that have seal recesses of a smaller inside diameter.

NOTE: For detailed instructions, please refer to the PICTORIAL INSTRUCTIONS Page.

Uprades these Outboard BB Bearing Systems:

Shimano® Hollow Tech II®

Race Face® X-Type®

*The bearings in our BB cup sets do not use plastic end cap/axle shims, allowing us to reduce the bearing ID and use

larger balls for greater strength!