Enduro Bearings Bearings Guide for 608 bearing-Outer

Balls (grade 5 high quality) and raceways steel cage graphite nylon and high end teflon grease (Kyodo Yushi):

High precision 5/1,000,000'' round balls, twice as round as the industry standard, at its highest level.
R-64 hardness, the highest grade.

Alloy 52100 spans with high carbon chromium content:

Degassing process to obtain the purest chrome steel, hardened to R-62, extremely hard and very strong.

Polished for a mirror finish and for precision and quiet ABEC-5 movement.

Graphite/nylon retainers for smooth operation and long-lasting lubrication.
To achieve ABEC-5 certification, bearings must pass an arsenal of tests, including high-speed noise testing, a draconian dimensional tolerance on ball roundness, ring depth and component facing.

C3: This specification describes the internal clearance between the bearing and its race. For example, in a 10-18 ID bearing, our tolerance level is 11-21 microns while others use 11-25 microns.

• 61900: 10x22x6mm (All purpose, often used for hubs)
• 61802: 15x24x5mm (All purpose, often used for hubs)
• 61902: 15x28x7mm (All purpose, often used for hubs)
• 61903: 17x30x7 (All purpose, often used for bottom bracket)
• 61806: 30x42x7mm (All purpose, suitable for BB30 Classic bottom bracket)

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Specifications

Manufacturer's number Not communicated Bearing dimensions 10x26x8mm