Originally Posted by
rapwithtom
Tire roundness question
In mounting tires (Vittoria Open Pave CG 25's; Conti 4000's; Conti Force/Attacks) to my Zipp 404's (clincher) with latex tubes, there's always some wobbliness. You can see the center of the tire wiggle slightly as you rotate the wheel, and you can see that the bead is not always perfectly roundly set into the wheel. (The wheels with no tire have no wobbliness - they're true).
I often repeatedly mount the tire, while paying careful attention to the lay of the latex inner tube, just to minimize this, but I never get it perfect.
Now I've started riding rollers, and on the rollers you can feel the asymmetries in the tire mounting (or perhaps it's partially an imperfect lay of the latex tube?).
My question is: Do others have this issue? What's a tolerable level of asymmetry? What does everybody do to minimize this?
You could try over inflating the tire to see if it pops into position. I've had this issue with Conti GP4000s too. A little baby powder inside the rim helps the tire not stick as much. I don't put it there specifically, but I do coat my tubes with powder before mounting so everything ends up sliding a bit easier.