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15-01.-2004, 03:22 PM
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#1 |
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Registered User
Join Date: Nov 2003
Posts: 4
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Dura Ace 2004 bottom bracket question
I have heard that DA's BB is not sealed, so it has to be cleaned on a regular basis, especially if riding in the rain. Is the 2004 DA any better?
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15-01.-2004, 11:26 PM
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#2 |
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Registered User
Join Date: Jul 2003
Location: Maryland
Posts: 321
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Re: Dura Ace 2004 bottom bracket question
All Shimano BB's are cartridge bearing sealed ....... have been for years, unless something has changed for this year ......
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'05 Aussie version Giant TCR C Zero ...... finally went over to the dark side and riding a carbon bike. But you can't beat a 17 lb. ride!! Eagleman 70.3 half ironman - 6/11/06 - here I come!! |
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16-01.-2004, 12:38 AM
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#3 |
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Junior Member
Join Date: Nov 2003
Posts: 1
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Actually, the 9 speed Dura Ace Bottom Bracket is not sealed and must be serviced regularly. That's why many use the Ultegra BB instead.
The 2004 D/A is compatible with the 9 speed. It is a completely different design and combines the BB with the crank arms. So, if you do go with the new design, you must replace the cranks as well. But, the new design is lighter, stiffer and should be less maintenance. Ferg |
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16-01.-2004, 01:37 AM
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#4 |
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Registered User
Join Date: Jul 2003
Location: Maryland
Posts: 321
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Interesting .... thanks for the info.
Back in my day as a mechanic, all Shimano was sealed ..... 
__________________
'05 Aussie version Giant TCR C Zero ...... finally went over to the dark side and riding a carbon bike. But you can't beat a 17 lb. ride!! Eagleman 70.3 half ironman - 6/11/06 - here I come!! |
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16-01.-2004, 02:00 AM
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#5 |
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Registered User
Join Date: Sep 2003
Location: atlanta, GA
Posts: 653
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I just finished building a bike with Ultegra/Dura Ace. I used DA STI and derailleurs. But my LBS mechanic suggested to use Ultegra BB instead of DA....and I believe it was for this same reason.
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17-01.-2004, 05:21 AM
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#6 |
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Registered User
Join Date: Jun 2003
Location: Maine, USA
Posts: 116
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True the DA BB is not sealed, HOWEVER it is MUCH lighter (+/- 75 Grams) and I get apx. 2k miles on my DA between repacks. I keep an Ultegra BB for winter riding.
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KUOTA Kredo: 14.5 lbs Dura Ace Controls FSA Carbon Pro Team Crankset C.A.T. USA Brakeset Kuota Carbon Post / San Marco Carbon Saddle Cinelli RAM Bar/ Stem American Classic Carbon Tubular 700c Tufo S3 Lite 215 Tubulars **Team SMCC Racing** |
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18-01.-2004, 05:05 AM
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#7 | |
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Registered User
Join Date: Nov 2003
Posts: 4
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Quote:
So the 2004 DA BB is not sealed? And do the 2004 DA shifters work with the ultegra BB? |
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