I just finished the week long stretching, gluing, mounting process of my first set of race wheels/tubulars. Front and rears are Hed H3’s and I have a couple questions:
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When I mount the wheels on the bike, suspended on a stand, and spin them, they are not the most “balanced” of wheels (i.e. there is a small amount of wobble) These are brand new, and no, they are not Hed’s off-of-true “specials”. I took a lot of attention to detail to make sure the tubulars were mounted on as staight as possible… Is there some sort of unfixable, slight wobbliness of H3s spun in this nature or do I have a bad set? Or did I glue my tubulars wrong? (which I painstaking took hours to research methods and methodically installed). Am I over analyzing ever little minute detail of my bike and going insane? (probably!)
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This is most likely due to what I asked in question #1, but when I crank the pedal and allow my back wheel to spin, the rear cassette I mounted (for the first time ever) “wobbles” as well. It was really the wobble of the cassette that freaked me out and caused me to rant off on this crazed thread… much apologies to all! … HELP!
Wobble, as in left to right? or up and down? If it’s up and down, then the rotating mass is unbalanced. I believe that’s only a problem if you want to get perfect (most optimal) acceleration out of the wheel.
As for the cassette, if it’s wobbling a lot, then you might need to get the freehub body checked out. If it’s just a little, that should be normal as it’s part of the design to allow easier shifting.
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Wobble side to side or up and down? Regardless, I’d guess that’s a tire/glue issue and not a wheel issue. It’s very easy to not perfectly center the tire when you’re gluing it resulting in a weave or wobble and have more glue in some spots resulting in slight “rises” or hops in the tire… not to mention that some tubular tires are not perfectly round (Continental’s are notorious for that).
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The wobble in the cassette is normal because of how they are shimmed to center or true the wheels.
Call HED and ask them directly if you’re concerned or don’t get your answer here.
The cassette wobble on the rear is “normal” according to Hed. I even send mine back and was told that was within their manufacturing tolerance.
I don’t race on Hed H3’s anymore. For that kind of money I expect the wheel to spin a lot smoother than those crappy hubs. Great design, lousy choice of materials IMO.
Yeah, I’ve been reading now that it may be necessary for them to shim the hub to make the wheels true… Just looks inefficient to me! I spin the back wheel, the cassette wobbles and the wheel slow and stops. It slows and stops much quicker than spin the rear training wheel.
Yeah, I’ve been reading now that it may be necessary for them to shim the hub to make the wheels true… Just looks inefficient to me! I spin the back wheel, the cassette wobbles and the wheel slow and stops. It slows and stops much quicker than spin the rear training wheel.
That’s the bearings and the hub and not the cassette… and how it spins while bearing weight may be different than spinning unweighted.