climbhoser

So, I need a new BB and I found a great deal on one from an online shop that has everything else I need at a great price. But, the spindle length I need is 113 and the BB with that spindle length is stated as a 68/73 instead of just 68 like the 108 sl is. What the heck does 68/73 mean and will it work?

BTW, I have a Cannondale 3.0 with Suntour GPX cranks, so if anyone can correct me on the spindle length I would appreciate that, too. This was what my mechanic said, but he's messed up before (always paid for it himself, though).

Thanks

Peek the Geek

68/73 means the bottom bracket will work in both 68mm and 73mm bottom bracket shells. If the frame's BB shell is 73mm, you use the bottom bracket alone. If the frame has a 68mm BB shell, then you use a spacer along with the BB (the spacer is typically provided).

So, if your frame has a 68mm bottom bracket shell then yes, the 68/73 will work. You'll just have to use the spacer.

climbhoser

awesome, thanks man!

twowheeltom

Does the spacer go on the drive or non-drive side? Or maybe two smaller spacers on each side?

I'm just quoting for reference. If anyone can help, please do.

Peek the Geek

Depends on the type. In my experience, the spacer goes on the drive side for ISIS and on the non-drive side for external (Hollowtech II). I can't say for sure if this applies to all types, though.

Check the internet for the tech documents of the BB you're using. Most manufacturers have these instructions available for download (or just RTFM if that's handy).