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- 68-
- Shimano Octalink V1
68- mm Shimano Octalink V1 Bicycle Bottom Brackets
The bottom bracket shell width is the width, in millimeters, of the frame where the bottom bracket is mounted.
This is an older standard that was used on some Shimano cranks. Some common Octalink V1 cranks models include, XTR (BB-M952), Dura-Ace BB-7700, Ultegra (BB-6500) and 105 (BB-5500).