Bicycle Mechanics - bottom bracket / crankset help

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devils4ever
07-18-07, 07:55 PM
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.

HillRider
07-18-07, 08:12 PM
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?category=600073&subcategory=60001096&brand=&sku=19514&storetype=&estoreid=&pagename=Shop%20by%20Subcat%3A%20Bottom%20Brackets

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

http://www.nashbar.com/profile.cfm?category=600073&subcategory=60001096&brand=&sku=20157&storetype=&estoreid=&pagename=Shop%20by%20Subcat%3A%20Bottom%20Brackets
devils4ever
07-18-07, 09:28 PM
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?category=600073&subcategory=60001096&brand=&sku=19514&storetype=&estoreid=&pagename=Shop%20by%20Subcat%3A%20Bottom%20Brackets

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

http://www.nashbar.com/profile.cfm?category=600073&subcategory=60001096&brand=&sku=20157&storetype=&estoreid=&pagename=Shop%20by%20Subcat%3A%20Bottom%20Brackets

Is the UN73 the same as the UN72? Will it fit?

Thanks.

urbanknight
07-18-07, 09:41 PM
Just a newer model if I recall. It will fit.
devils4ever
07-19-07, 05:38 AM
Thanks a lot. It's on order!