I'm trying to build up an old frame I have and I need a bottom bracket. I'm pretty sure it's 68mm. There are a few different types of 68mm bb various splines and the pass through spindle type. Can I use any as long as I have the right crankset?
An older frame likely uses 68 pr 73mm spacing. That's Just a matter of a 5mm spacer. You want to make sure the spindle length is correct for the frame and the bottom bracket bearings matches the spindle diameter.
So I can use square taper, ISIS, octalink, or the pass through I guess they are called bsa30 or bb30 as long as I get the correct matching cranks/spindle?
So I have no cranks or bottom bracket right now just a bare frame. I also don't have a caliper but with my tape measure I get about 68mm wide and 33-34mm inner diameter threaded.
When I go to a place like chainreaction or jenson and check 68mm. I get square taper, powerspline, ISIS, octalink which aren't in the chart you put up.
So I have no cranks or bottom bracket right now just a bare frame. I also don't have a caliper but with my tape measure I get about 68mm wide and 33-34mm inner diameter threaded.
When I go to a place like chainreaction or jenson and check 68mm. I get square taper, powerspline, ISIS, octalink which aren't in the chart you put up.
yes it depends on the crankarm interface. pick a set of cranks first, see what the interface is, then find a compatible bb. most normal bbs are either 68/73 (work with both) or 83 (usually dh bikes only).
yes it depends on the crankarm interface. pick a set of cranks first, see what the interface is, then find a compatible bb. most normal bbs are either 68/73 (work with both) or 83 (usually dh bikes only).
That I knew. I've never switched between different 68mm BBs so I wasn't sure if all the different types were the same diameter. I didn't want to buy cranks and BB just to find out it didn't fit the bike.
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