- OD: 42mm
- ID: 30mm
- Width: 7mm
- Grade 10, 5/32" chromium steel balls
- Round to within 10 millionths and twice as round as top of the line Dura Ace and Record loose balls.
- Riveted Steel Retainer for toughness, ABEC-3 tolerances and noise tested, C-3 or C-N Internal Clearance
- 52100 High Carbon Chromium Alloy Races vacuum de-gassed process for the purest chromium alloy steel, hardened to R-62, extremely tough and very durable. Polished to a mirror finish for ABEC-3 precision and noiseless movement.
- Kyodo Yushi SRL grease or equivalent
- BB30 Standard
- PF30 Standard
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