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Ultgra vs. Dura Ace bottom bracket?(7 posts)

Ultgra vs. Dura Ace bottom bracket?DERICK
Dec 6, 2003 6:34 AM
I just purchased a Giant TCR1 and am in the process of removing the Ultegra group and installing a Dura Dce group from my old bike. I'll be selling off the new ultegra group later.

My question is. Should I keep the Ultegra bottom bracket or use the Dura Ace and why?

Thanks, and I'll post some pics when I'm finished.
Keep your Ultegra BB....davet
Dec 6, 2003 8:21 AM
..while it weighs a only a few oz more that the Dura Ace, it's much easier to set up, maintain and adjust. It is a sealed unit, while the Dura Ace bearings are exposed. If you don't maintain (clean & re-grease) your Dura Ace BB, it won't last more than a season or two at best. The D/A is fussy about installation and adjustments. The Ultegra BB, being a sealed unit, is sort of an install and forget type.
Ignore the slams against the DA Bottom bracket.Uncle Tim
Dec 6, 2003 11:26 AM
Just overhauled the DA BB on one of my road bikes. That thing is pristine and I've lost track of the time and the miles on it.

If you want to buy a good bottom bracket that you will use until it fails, then by all means, go with the Ultegra. But there's no adjustment, no maintenance, no nothing with it. It fails and you buy another.

The DA BB is lighter and it's smoother than the Ultegra. It's noticably better.

The bearings are not exposed as the other writer said. They have some small plastic/rubber seals that work quite well. The only damage I've seen on a properly maintained DA BB is outside of the seal area.

Installation of a DA BB is easy - slightly more difficult than the Ultegra. You will need two tools: the standard Shimano BB tool, and a lock ring tool. I made my lock ring tool myself.

The final adjustment is pretty easy, too. You've got plenty of wiggle room. You could tell very easily if the adjustment is either too tight or too loose.

You will have to overhaul the BB from time to time, but it is no biggie. If you are still scared, just take the bike to a LBS every couple thousand miles and have them overhaul it for you.

RBR has overhyped the alleged weakness of some components. The DA BB has been unfairly maligned. (I'd say the next most maligned product on RBR is the very tested and true Mavic Open Pro rim.) I see the anti-DA BB chant as a kind of urban myth.

I am one of those who is tired of going through Ultegra BB's.
Dura Ace bottom brackets are:Alexx
Dec 7, 2003 11:46 AM
1) light.

2) expensive.

3) smooth.

4) expensive.

5) poorly protected from the elements.

6) expensive.

7) fragile.

8) did I mention that they were expensive?
Yes, you mentioned the word "expensive"...Uncle Tim
Dec 7, 2003 3:05 PM
A DA Bottom bracket costs all of $8 more than an Ultegra BB...

Fragile? No.

Poorly protected from the elements? No. They just need to be overhauled from time to time.
Thanks I think I'll...DERICK
Dec 7, 2003 6:29 PM
install the Dura Ace and sell the Ultegra with the rest of the group. I've overhauled it once already and don't mind doing it again.
Don't do it!MShaw
Dec 8, 2003 11:01 AM
Stick with the Ultegra. In the long run, you'll be glad you did.

As the owner of two D/A BBs sitting on my workbench and two Ultegra BBs in my bikes, I can say for certain that D/A aren't worth the hassle.

Listen to me now, hear me later!

Mike