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Old 05-12-08, 09:19 AM   #1
BILLB58
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Bottom Bracket - Expected Life Span?

I upgraded to a new Dura Ace ten speed drive train last April....now have 4,968 miles on the bottom bracket and it is now clicking which I am interpreting to be a problem. Have verified that nothing is loose. Should I be expecting a longer life span than this? Or is this "normal"?

If I should be expecting a life span of 5,000 miles +/-, than it would seem to me that I should be upgrading to a Phill Wood bottom bracket, or something of that caliber.

As an aside, I am 6'1" and 210 lbs, and am apparently very hard on bikes....my ten speed chains are always "all done" at 2,000 miles....I commute 24 miles R/T every day and usually do a 60-80 mile ride on 2 to 3 Saturdays a month.
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Old 05-12-08, 09:25 AM   #2
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I just replaced the bb in my Trek 6700 hardtail...a bike that has seen some hard use.

The bb was a low end Acera and lasted about 4000 miles before it needed replacement and was on the bike when I bought it used... the bike needed a full drive train replacement when I purchased it so that bb probably had a lot more miles on it.

The Dura Ace (and XTR) bottom brackets can be serviced / adjusted unlike Shimano's other cartridge bb's.
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Old 05-12-08, 09:54 AM   #3
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He has DA ten speed which is an external-bearing BB, not a cartridge.

IMO, it should last a lot longer than 5000 mi. Have you checked that it's tight? Any detectable slop? Maybe your pedals are clicking.
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Old 05-12-08, 09:57 AM   #4
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Kinda normal life from what I've seen. Toss in an Ultegra and ride on.
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Old 05-12-08, 02:53 PM   #5
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Make sure your left crankarm isn't cracked (you may have to remove it to check from the inside).

I had a creaking that I SWORE was from my BB, but it was the left crankarm, cracked....it was also dura-ace.

I think your BB should last a lot longer than 5k miles, btw.
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Old 05-12-08, 07:39 PM   #6
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Not sure about DA but I have over that on my used Ultegra ten speed stuff
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