SHIMANO DURA-ACE TRACK BB-7700 68mm NJS

SHIMANO DURA-ACE TRACK BB-7700 68mm NJS

This bottom bracket uses both ball and needle bearings to reduce flex for greater power transmission efficiency.

NJS approved!

BB Shell width: 68mm

Axle Length:109.5mm

Mount: splined crank arm mounts

Sealed Cartridge Unit

Weight: 173g

Made in Japan