Hondo Gravel

AnkleWork

How much wobble -- in mm?

Just so you'll know: no wheel, tire, anything can be perfectly round, true, etc.

DrIsotope

With such limited information, I would select bad mount. Let all the air out of the tube, use a small paintbrush to run soapy water (or bubble juice) all the way around the beads on both sides of the tire. Nine times out of ten, that straightens it out.

JohnDThompson 

Is it the tire that wobbles, or the rim? If the tire, it's probably a poorly seated tire bead. Deflate the tube, lubricate the bead with soapy water, and reinflate. The bead should pop into place uniformly.

If the rim, re-true the wheel.

Hondo Gravel

DannoXYZ 

You've not mounted tyre with tube fully enclosed. Some of that tube is trapped between tyre and rim and is pushing tyre-bead away from rim. Otherwise known as "pinched tube". Here's some steps to avoid it:

1. no levers needed

2. pre-inflate tube slightly (1/2-3/4 pump of hand-pump) so it's round and not flat (flat gets pinched easier)

3. install one side of tyre onto rim

4. stuff tube's valve-stem into rim, then rest of tube

5. start pushing 2nd bead of tyre onto rim somewhere AWAY from valve-stem, 90-180 degrees away. DO NOT start and stop installing 2nd tyre-bead at valve-stem

6. finish pushing rest of 2nd tyre-bead onto rim. By hand if possible, aim at spot where bead wraps over rim-edge to push. Might be easier with some air let out.

7. Now, push valve-stem away from hub, INTO tyre in case it's pinched, very , very easy to do

8. let out 1/2 of air.

9. push tyre sideways so you can see inside gap between tyre and rim-edge all way down to rimstrip. See any tube? No? Good, move over 3-4 inches and push tyre sideways away and inspect gap between tyre and rim edge. Work your way around entire edge of rim verifying no tube is showing. Then repeat on other side of rim.

10. only and only when you've inspected tyre 360-degrees around rim on both sides, and verified no tube is showing anywhere, then you can inflate.

Guess what? Perfectly even tyre mounting with no wobbles! Good work!


BTW - Pinched tube is also cause of mysterious spontaneous giant >BANG< in middle of night as tube squeezes out between tyre & rim-edge and explodes!!! Tell-tale signs are asterix-shaped massive hole.


step 9 - checking for trapped/pinched tube between tyre and rim-edge

altenwrencher

I would add to Danno's good advice only this: Powder the tube with baby powder (shake in a bag.) That helps the tube distribute itself evenly inside the tire.

Colnago Mixte

I'm also a big fan of baby powder, I keep my spare tube in a ziplock sandwich bag with some baby powder in the seat bag on my bike and let it bounce around for a few hundred mile., Kinda like Shake and Bake chicken except you don't need to bake it.

Be sure to use the correct size inner tube. One that's too big will try to fold up inside the tire, cause a lumpy tire profile, and will probably go flat on the first ride from a pinch.

One that's too small will be a breeze to mount, but you can end up with what looks like a defective tire, because it will stretch out unevenly due to the rubber being thicker in some spots than others. Same as a balloon that's overinflated, just before it bursts.

A while back I started using 700 x 35 mm tires, and tried using my old 700 x 23 tubes, Lots of uneven tires and nonstop flats until I started using the correct size tube. Makes a big difference, though YMMV.