17287-2RS Ball Bearing, 17x28x7mm Steel Balls Rubber Sealed, MR17287 RS Hub Bearings for Hope Fatsno Pro4 Lower Crank, (Pick of 3Pcs)

• Fit Perfectly - ISO 492:2005 Standard, The aperture tolerance range is controlled between 7um, make sure fit great.
• Roll Smoothly - Internal G5 steel ball and synthetic grease, minimize friction, improve rotation efficiency.
• Without Backlash - Under the condition of non-laod, the radial swing play is within the 9um range.
• Dimensions Correspond - Inner ID 17mm, Outer OD 28mm, With B 7mm, match the rear hubs of the bike.(the rubber sealed color sent randomly).
• Specialized recommends you replace these about once every 6 months with agressive riding and once a year for passive riding.

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