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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 07-18-07, 07:55 PM   #1
devils4ever
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bottom bracket / crankset help

Hi all,

I'm looking for a Shimano BB-UN72 73mm x 110mm bottom bracket. Nobody seems to sell one for my Trek 4500. I replaced it 4 years ago or so and it's toast again. I also replaced the crankset with a Deore. If I can't find the BB can I replace both with a Shimano LX FC-M580 crankset. Will this work with my existing FD and chain?

Thanks all.
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Old 07-18-07, 08:12 PM   #2
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You are in luck. Nashbar has the UN73 bb in 73x110 in stock and it's only $18. Look here:

http://www.nashbar.com/profile.cfm?c...tom%20Brackets

Even cheaper, they have the UN25 in 73x110 for only $6! Again, look here:

http://www.nashbar.com/profile.cfm?c...tom%20Brackets
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Old 07-18-07, 09:28 PM   #3
devils4ever
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Quote:
Originally Posted by HillRider View Post
You are in luck. Nashbar has the UN73 bb in 73x110 in stock and it's only $18. Look here:

http://www.nashbar.com/profile.cfm?c...tom%20Brackets

Even cheaper, they have the UN25 in 73x110 for only $6! Again, look here:

http://www.nashbar.com/profile.cfm?c...tom%20Brackets
Is the UN73 the same as the UN72? Will it fit?

Thanks.
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Old 07-18-07, 09:41 PM   #4
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Just a newer model if I recall. It will fit.
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Old 07-19-07, 05:38 AM   #5
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Thanks a lot. It's on order!
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