GreenPlease wrote:
Anecdote: I'm in a tubeless experimentation phase right now. Just mounted up an S-works Tubeless 28mm on to a Belgium+ rim. Got the tire on with just a touch more effort than a normal clincher. Had the tire mounted and seated within two minutes. Measured width inflated is 31mm. I also have a Specialized Roubaix 30/32 that I'm trying to mount to a Belgium+ rim. I could barely get the first bead on and the 2nd bead looks impossible to mount. I suspect a lot of this comes down to variations in the bsd from rim to rim, tire to tire. Millimeters seem to really matter to tubeless tires.
My hope is that Mavic's Road UST standard catches on... so long as someone makes tires to the dimensional spec without the butyl liner.
In my experience, the first bead always goes on better if:
1. First place the rim inside the tire so that each tire bead is outside it's respective rim-flange.
2. Pull bead from outside of rim-flange onto rim with the inner surface of the tire dragging over the flange.
I'll refer to this as Left (Bead) over Left (Rim) and Right over Right
This is different from home many people mount tires in that they just start putting the tire on such that the "left" tire bead is pull over the Right rim flange and then the right tire bead is pulled over the right rim flange.
Additionally, when mounting tubeless tires the "twist" method is where it's at.
1. Mount first bead as I suggest (left over left, right over right)
2. Follow Tom's advice above.
3. When you get to that point where the bead does not want to go over the rim flange try this (ie: never use a tire lever again):
a. Kneel or Squat
b. Hold wheel vertically in front of you, such that it is perpendicular with the unmounted bead at the top of the wheel and facing away from you (cannot see the bead)
c. Place your right hand near the right edge of the unmounted bead
d. As your grasp the tire/rim combination, place the "callouses of your palm" just underneath the unmounted bead. The natural fold in your palm will act like a hook.
e. While gripping the tire and rim tightly, rotate your hand (like a motorcycle throttle) such that you are twisting the bead up and over the rim flange
f. Move hand and repeat until bead fully on.
*can be done with tubed tires, just be carefully to not damage the tube
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