Paul Donohue bottom bracket query

dabseee

Retro Newbie
Hi
I have aquired a 1996 Paul Donohue 16 speed racing bike. On purchase all original Campagnolo componenents were present apart from the cranks had been changed to Shimano octolink and Shimano bottom bracket.
I have aquired a Camapagnolo Chorus crankset of the right era but am confused how to work out the correct size for the Compagnolo bottom bracket. I know it is a 68mm english thread but how do I work out the correct length ?
Please go easy on me as I am a bit of an amatuer bike restorer !
 
Re:

If it says Chorus on the cranks then it's 102mm, the older ones with the shield logo (pre 95 I think) use 111 mm.
 
Re:

You need an ISO taper as well, rather than a JIS taper.

There are a couple of after market ones badged Neco, Tifosi or Token that are quite a bit cheaper than the Campagnolo ones.
 
Re:

Thank you so much for the informatino. My cranks have the badge on so bb will be 111mm.
This coresponds with my rough measurements.
Hunt is on for bb now !
 
These Tifosi BB’s are good value for money I have a couple & very smooth & you can upgrade the bearings quite easily to SKF or NTN
 
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