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Discussion Starter · #1 ·
I have always had bikes with 68mm bottom brackets and awhile back I acquired a steel Colnago Super retro modded with a Shimano 105 11 speed group...needless to say, the bottom bracket is 70mm Italian thread....
I recently picked up a Serrotta Legrend Ti and I want to switch the crankset from the Colnago to the Serotta....I have a 68mm BB, will the Shimano 105 work?...Is the spindle longer for the 70mm BB?...will I need spacers?

Thanks
 

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The crankset does not care.

The difference in width is taken up by the BB.
 
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