New Dura Ace bottom brackets don't last

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Bentnose
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New Dura Ace bottom brackets don't last

Postby Bentnose » Fri Nov 24, 2017 6:15 am

I was running my last Dura Ace external bottom bracket for 3 years before it gave up the ghost. It's replacement was the new smaller style ones and it has only lasted 11 months before sounding like a can of marbles. In fact it became so bad so fast I've stopped riding the bike with it in, I can usually put up with a wonky bottom bracket for a while before having to replace it.

Is anybody else having issues with these BB's or did I just get a dud? I've got a new Ultegra one but they are also of the smaller variety now as well, bit worried because I installed a small XTR one on the MTB as well.
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Duck!
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Re: New Dura Ace bottom brackets don't last

Postby Duck! » Fri Nov 24, 2017 10:05 pm

My similar slim-line XTR has been in for around 18 months and is still running like new.
I had a thought, but it got run over as it crossed my mind.

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Bentnose
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Re: New Dura Ace bottom brackets don't last

Postby Bentnose » Sat Nov 25, 2017 8:19 am

Hopefully just a rare dud one then.
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Bentnose
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Re: New Dura Ace bottom brackets don't last

Postby Bentnose » Sat Nov 25, 2017 6:15 pm

Interestingly, the Ultegra BB is a little bigger than the Dura Ace one, it uses a different adaptor plastic tool thingy, wonder if this means bigger bearings and better wear?
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biker jk
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Re: New Dura Ace bottom brackets don't last

Postby biker jk » Sat Nov 25, 2017 6:45 pm

Bentnose wrote:Interestingly, the Ultegra BB is a little bigger than the Dura Ace one, it uses a different adaptor plastic tool thingy, wonder if this means bigger bearings and better wear?


I have over 17,000km on an Ultegra 6800 bottom bracket and it's fine.

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Bentnose
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Re: New Dura Ace bottom brackets don't last

Postby Bentnose » Sun Nov 26, 2017 10:21 am

Cool, I only got about 3000km out of my Dura Ace one.
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tallywhacker
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Re: New Dura Ace bottom brackets don't last

Postby tallywhacker » Mon Nov 27, 2017 10:26 am

went through 2 in about 18 months. I think they are made out of cheese. Back to using a good old reliable square taper

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Bentnose
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Re: New Dura Ace bottom brackets don't last

Postby Bentnose » Mon Nov 27, 2017 7:17 pm

I got a Wheels Manufacturing one for my new MTB, may have to move away from the Shimano ones if short lifespans keep occurring.
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