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ANSWER CERAMIC BOTTOM BRACKETS

Designed for use with two piece pro cranks (ideally the AccelerateRs).
Ceramic bearings offer a smoother- turning crank than a traditional cartridge bearing for freer turning cranks and less energy wasted.
The result is a significant reduction in spinning resistance that can be felt immediately when you make the switch from a traditional BB.

Weight: 3.2 oz / 90.7g