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Sealed Bearing BB????


Old 09-15-08, 08:09 PM
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Need Help with Swiss Bottom Bracket conversion issue!!!!

OK, It's a very new endeavor of mine to learn how to repair, maintain, and upgrade my own bike. It's far too expensive to have someone do everything for you, so i figure i can save myself a few bucks and prevent any long bikeless weekends from affecting my future cause my bikes in the shop. Before i get to the point, please forgive my utter ignorance in this matter. I have an old Motobecane Nomade Road bike I'm converting and I'm having issues with the bottom bracket. I bought a Sugino Messenger crankset to replace the old Archaic-looking set that was on before, and I know this means I'll require an entirely new spindle length to keep the chain line legite. I was going to purchase an entirely new Cartridge style unit until I found out that my motobecane is threaded in the now obsolete Swiss thread, and I'd have to dish out $150.00 + for a phil wood setup which I can't afford. The cups and bearings on my Motobecane are in Mint Condition, so i Figured I'd just shop around for a new spindle. The only acceptable spindles I've found as far as long and taper go are Ritchey WCS sealed bearing cranks, but I'm not sure if I would need new cups to allow for sealed bearings? Can someone help me out? I'm open to any alternative suggestions as well. Thanks

Last edited by goldenboy; 09-15-08 at 08:37 PM. Reason: wrong title
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Old 09-15-08, 08:50 PM
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I don't know of anything other than a Phil that will work. Nothing made recently will work for you. You need a NOS cup and cone style spindle.
I don't know for certain, but a spindle from a bottom bracket with a more common threading may work. Go to your LBS and they probably will have a metal recycle bin that you can go through and find a spindle to see if it will work before you spend money on a new one.
Another possible option is to flip the spindle end to end.
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Old 09-15-08, 10:09 PM
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I would agree on searching around for a new spindle. You should be able to make another spindle work just fine, since the Swiss BB shell is still 68mm wide. Forget going sealed, just make sure your cups aren't pitted and repack with new bearings.

Or even better, tap the Swiss BB shell out to ISO.
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Old 09-16-08, 07:10 AM
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Originally Posted by 5vforest View Post
Or even better, tap the Swiss BB shell out to ISO.
You can't. Swiss is 35 mm diameter and English/ISO is 34.8 mm so the hole is already too large. The OP could have the bb reamed and tapped to Italian threads (36 mm) which would open up a whole world of alternate bottom bracket models.

I agree that looking for a new suitable spindle and keeping the current cups is the cheapest solution.
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Old 09-16-08, 10:19 AM
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Maybe you should re-think using your old "archaic looking" crankset, eh?
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