China Bottom Bracket Bearing,Bottom Bracket Bearing Manufacturer
Bicycle Bearings
(73)
Track Rollers
(27)
ISIS Drive bottom bracket bearing MR215317-2RS MAX(MR21531-2RS MAX, 215317-2RS MAX).
Basic size: 21.5(d) × 31(D) × 7(W) mm.
Full complement ball bearing(MAX type, no cage/retainer) design.
Special sealing performance.
Chrome steel 100Cr6 material for races and balls.
Mobil XHP-222 grease.
Application for ISIS Drive bottom bracket.
