May 9, 2001 3:42 PM
|Can anyone post comments about the differences between Ultegra and DuraAce hubs from their personal experience? I am not really interested in technical differences (materials, weight), but I would like to know if you can actually 'feel' the difference out on the road -- such as how smooth they feel or how quickly they accelerate, etc. Also, I would like to hear about the American Classic's ultralight hubs if anyone has tried them. Thanx.|
|re: Hubs||grz mnky|
May 9, 2001 4:09 PM
|You can't really feel the difference while riding. You're paying for something that will last longer, is better built, lighter, better finish, and will hold an adjustment longer. It's a common misconception that some $300 high zoot hub will actually make you faster. If you want something that is more robust get the DA, if you want to save a little $$ then get the Ultegra. It would be best to match the quality of the rim and spokes with the hub - no point in having one component die much sooner than the others.|
|I Disagree, to a point.||blue bayou|
May 9, 2001 4:25 PM
>You can't really feel the difference while riding.
enough miles and you can.
>You're paying for something that will last longer, is better built, lighter, better finish, and will hold an adjustment longer.
At least what we hope for.
>It's a common misconception that some $300 high zoot hub will actually make you faster.
Plenty of riders would disagree. Especially higher ranking riders, pros, top Ams, etc.
I will agree that the differences between DA and Ultegra hubs are tough for the average rider to feel. Is that what you meant?
|Sorry for the soddy msg. nm||blue bayou|
May 9, 2001 4:27 PM
|Yes and No||grz mnky|
May 9, 2001 5:22 PM
|Well, in theory I'd like to agree with you, but the data isn't there. |
I was mainly refering to the difference between DA and Ultegra, but it holds true with the other after market hubs also - to a point. It doesn't really matter what people want to believe - it comes down to the guys with the slide rules and pointy heads doing the analysis.
When you get all into careful analysis of bearings and hubs you'll find that any differences are extremely small. We actually did an analysis in my Mechanical Engineering program with the professor who was the faculty advisor for the Cornell bicycle land speed project back around 1979 and became head of the department - he's way into racing cars and bikes. You can make a bigger difference in rolling resistance with your tire choice and infaltion pressure. Part of the rub is the diameter of the bearings in comparison to the diameter of the bike wheel. This is why it makes a bigger difference on something like a roller blade. If you really want to run fast you should clean all of the grease out, replace it with WD-40, then ride your race and throw away the trashed bearings afterwards.
If things were so obviously true the industry would have all settled on the optimum design. It's pretty hard to make much improvement on ball bearings - they're well understood and the manufacturing tollerances are amazing. The component cost doesn't mean much when you're at the elite end of competition. Carry it one step further - what about the little _journal_ bearings in the rear der. cage? Wouldn't this be a huge loss - they rotate a lot faster than the wheels.
What you're really paying for is ease of maintenance and durabiltiy - and some swank finish.
|Yes and No||Cleat|
May 9, 2001 8:33 PM
|"It doesn't really matter what people want to believe"
Just like you want the poster to believe what you wrote,eh?
|4 pints later....still, hose the shi*t off me...||blue bayou|
May 9, 2001 10:53 PM
|First, we agreed about DA and Ultegra being nearly identical, so what about it? Second, your student "analaysis" may be seriously flawed. I'm sure you doubt it. No rider will put together new wheels and then run them at a low pressure, say 60 lbs or something.
Good hubs are a source of speed. Do you have grease fittings? Do you run open bearings? Do you use heavy grease?
The only thing that impressed me about your "knowledge" was the word SWANK. Do you really know what that means?
Main Entry: 3swank
Variant(s): or swanky /'swa[ng]-kE/
Inflected Form(s): swank·er or swank·i·er; swank·i·est
Date: circa 1842
1 : characterized by showy display : OSTENTATIOUS
2 : fashionably elegant : SMART
- swank·i·ly /-k&-lE/ adverb
- swank·i·ness /-kE-n&s/ noun
Sounds like you... not the finish.
|4 pints later....still, hose the shi*t off me...||grz mnky|
May 10, 2001 11:08 AM
|So "swank" wouldn't be a good word to use for the Fruit Loop colored Chris King hubs? |
So which hubs are the "fastest" and where's the data - it's intuitively obvious to the most casual observer, right?
Just 'cause you believe something doesn't make it true. Like the bumber sticker says, "Too bad ignorance isn't painful."
May 9, 2001 8:48 PM
|I have to disagree with grz mnky, while I've never noticed a difference in acceleration the dura ace hubs feel smoother while riding. Yes tires can make a big difference but I'm too cheap to actually have 2 sets of tires and has a result simply move the tires over when I go to use the other wheel set for races. TTFN|
|Thank you all for your comments+suggestions (nm)||5ive|
May 10, 2001 6:55 AM
|it is absolutely impossible that you could feel a dif.||Jimbob|
May 10, 2001 3:53 PM
|between DA and Ultegra hubs while riding. Its in your head!! Heck, you can barely feel it at the axle let alone at the tire. Like Monkey said, this would be and is much more noticeable on something smaller like a skateboard or rollerblade wheel.|| |