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Threaded spindle BB

Old 10-12-05, 10:32 PM
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DonChuwish
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Hello. I've browsed through the MANY BB related threads and haven't seen what I'm after, so sorry to start yet another but here goes.
I have a lovely 80s Ciocc that never had a proper family of components hanging on it. I bought the frame and fork to replace a Peugeot I bent. As a poor college student at the time it became a Cioccenstein. Anything from the Peugeot that would fit came on over, borrowed or bought cheap used parts filled in the gaps. Now I'm back into cycling finally and will probably get a new bike, but I want to shape up the Ciocc as a fun project and use it as a commuter.
I want to get some 80s era Campy cranks to finally replace the very worn and unsightly Peugeots. But I have an odd looking BB spindle that has me wondering what length Campy replacement I need. Pictures attached for clarity. The bike shop back then must have put this BB in just to allow me to use the Peugeot cranks.
Instead of crank bolts, I have crank nuts and the spindle is threaded for them, just out beyond the end of the square taper. If I measure the spindle to the ends of the taper (not the threads) it is 120mm. I know I need a 70mm 36x24, but if I find 80s C Record or Record cranks, should I be looking for a 120mm spindle or some other length?
Thanks!
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Old 10-13-05, 08:10 AM
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Adker
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The 80's Record cranks take either a 109mm or 111mm axle. I know there is a 109 listed on Ebay now.
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Old 10-13-05, 11:00 AM
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"If I measure the spindle to the ends of the taper (not the threads) it is 120mm. I know I need a 70mm 36x24, but if I find 80s C Record or Record cranks, should I be looking for a 120mm spindle or some other length?
Thanks!"


Someone put in a cheapo replacement spindle on your bike. The Campy BB has a hollow bolted spindle, rather than the nutted one you have. The cups also do not use contact seals, but rather have a non-contact spiral that uses the spindle motion to push debris to the outside (and extra grease). It was one of the smoothest-rolling BBs of its time.

As for spindle-length, yes, measure to the end of the taper. You may want to verify chain-line alignment with the existing one and adjust length from there. The middle of the crank (between the two chairings) should line up with the middle of the rear cogs for a straight chain. Most likely on your bike, the crank is too far out. So you may want to get a shorter spindle. But check to make sure the ends of the crank won't hit the chainstays and that the arms don't bottom out onto the BB cups as well.
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