To check for correct bearing numbers simply remove the old bearing and read the bearing number which is wrote on the rubber seal of the bearing. Please note you may have to clean grease off to view it.
Features:
• Correct bearings for any mountain bike bottom bracket with the number 6903 2RS or 61903 2RS
Kit includes:
• 2 bearings
Ceramic bearing upgrade features
• Lighter weight
• Less power required to drive crank
• Exceed performance and spec of original bearing
• Less friction
• Up to 40 percent faster
Please see my other listings for other bearing numbers