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PostPosted: Wed Oct 09, 2013 10:44 am 
Dirt Disciple

Joined: Wed Jun 15, 2011 3:19 pm
Posts: 44
I have a Shimano UN-51 BB in 113mm x 68mm, but I've lost the adjustable (NDS) cup for it. Are these cups interchangeable with other similar BBs? The original cup was steel, I might be able to find a spare plastic one off an old shimano BB. What are the chances one from another BB will fit?
AnJ.


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PostPosted: Wed Oct 09, 2013 11:31 am 
Retro Guru
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Joined: Thu Jun 23, 2011 11:25 pm
Posts: 1784
Location: It's not easy being a dolphin.
Approx 100% ;-)


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PostPosted: Wed Oct 09, 2013 12:02 pm 
MacRetro rider
MacRetro rider

Joined: Fri Feb 09, 2007 4:16 pm
Posts: 8658
Should be OK but 100% chance of perfect fit is a tad optimistic, metal cups are often thinner walled than plastic which means plastic might not fit that model. Only way is to try and see :wink:


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PostPosted: Wed Oct 09, 2013 4:31 pm 
Gold Trader
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Joined: Wed May 20, 2009 1:29 pm
Posts: 10798
Location: Manchester, UK
Far from 100% in my experience, even with same brand. Needs to be snug, not loose or super tight, hope this helps!


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PostPosted: Wed Oct 09, 2013 4:40 pm 
King of the Skip Monkeys
King of the Skip Monkeys
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Joined: Wed Nov 07, 2007 4:34 pm
Posts: 26146
Location: Moomin Valley
plastic cups seem to work fine with other shimano BBs. Metal cups, so far, have worked too.


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