Price: $50 to $260 each
Sizes: 8mm to 30mm
Web site: www.bocabearings.com

Boca Bearings has upgraded its ceramic bearing line with the new Peeka Boo 5. The new Peeka Boo 5 uses both ceramic races and ceramic balls, which Boca believes contributes to a greater reduction of friction and perhaps a better wear rate. The races are ABEC 5 and made of Zirconia, and the balls are grade 5 and made of Silicon Nitride. Boca believe that the new grade-5 balls are more spherical than previously available.

If you're looking to save weight on a new lightweight wheelset, bottom bracket, or pulleys, then the new full ceramic Boca Peeka Boo 5 may help you shed those extra grams.

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