The Weapon Hollow Tech BB 51 bottom bracket bridges the crankset to the bicycle and allows the crankset to rotate freely. It contains a spindle to which the crankset attaches, and the bearings that allow the spindle and cranks to rotate.

The BB 51 Hollow Tech Bottom Bracket is concentrated on producing a powerful crankset which will maximize a rider's power transfer. It incorporates the bottom bracket axle with the right crankarm for more firmness and a weight saving to maintain the rider and bicycle's equilibrium.

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• Weight: 100 grams