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04-17-24 | 12:45 AM

#2

FBinNY

Senior Member

Joined: Apr 2009

Posts: 39,897

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From: New Rochelle, NY

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Quote:

Originally Posted by Steel Charlie

So I have a TruVativ GXP crank in a 68mm bottom bracket. Can I screw in the GXP Italian BB into a 70mm shell and use the same crank?

TIA
Charlie

That would be a 70mm Italian threaded BB, I hope.

The issue is the length of the spindle. If it was always offered in 68 & 70mm versions, there was probably a way to factor the 2mm. Most likely a spacer, not used with 70mm. Or possibly both BBs have the same outside width, with the difference made up internally.

So, your bike will answer for you. Is there a spacer you can leave off? Or measure both BBs and compare.

Of course there's the bad for you possibility that they made two versions of the crank itself.

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FB
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