Out-of-round tire

Downeaster · Mar 13, 2012

While investigating my front suspension issues, I noticed a pretty significant shake at low speeds. Initial suspicion was that I had a tire balance problem.

This morning I put the bike on the center stand and spun the front wheel.

Using the front edge of the fender as a reference point, there's about a 4 or 5 inch section of the tire that "dips" about 1/4" when it comes around. It appears to be a casting issue in the tire carcass.

I checked the rim with my "Phillips Dial Indicator"

and it runs true around the circumference as well as side-to-side.

I bought the tire (A Bridgestone S11) through Bike Bandit so I have a note in to them asking about ways to resolve the issue.

gggGary · Mar 13, 2012

Are you sure the tire is "popped' so the side wall line is a consistent distance above the edge of rim all around? When fitting tubeless tires this often takes a few inflations deflations bouncing around etc before the tire seats evenly.

littlebill31 · Mar 13, 2012

My bike had the same problem. I'm assuming the bike had been sitting on a flat front tire and warped it, but it might have just been the tire. I took it to a good tire guy and he couldn't even get it back on correctly. He put something like 100psi in it and the bead would not seat. I had to get a new tire.

Pic one, you can see how it is turned.

It's not plyable either, it's tough to straighten it.

Pic two, you can see the line the rim made under the writing where it was seated.

Downeaster · Mar 13, 2012

Ah. Good Call gggGary! I just checked and it is seated a little deep in that spot.

I'll do the deflate/wiggle/reinflate drill a couple of times and see if it seats properly.

Thanks!

5twins · Mar 13, 2012

You may need to break the bead free in that area and apply some lube.

Dusty · Mar 13, 2012

I always lube mine up real good with dish soap. That works for me most of the time. If it won't seat in that area,try the soap thing.

Tomterrific · Mar 13, 2012

It isn't uncommon to have a tire bead not pop out properly. I've had a very difficult time with this same problem. Lots of lube on the bead is the solution. To get the lube in the correct place you may need to break the bead and use a brush. I absolutly hate when I need to do a job twice. The 100 psi thing is a bit dangerous, don't you do that!

Tom

XSLeo · Mar 13, 2012

I have had a few tires that are hard to seat completely. I have left the tire a bit soft, around 15 to 20 lbs, and took it for a ride. Not to fast or too long. Ride a bit, check tire, repeat a few times. It usually wont take much. The extra weight of the bike flexes the sidewalls more than mounting, bounceing, pounding does.
Leo

littlebill31 · Mar 13, 2012

Tomterrific said:
The 100 psi thing is a bit dangerous, don't you do that!

Tom

LOL, that was the tire guys idea, not mine. I walked out of the shop when he did it.

hooktool · Mar 13, 2012

You can put a strap around the circumference of the tire which helps apply pressure to the bead area.

John

Downeaster · Mar 20, 2012

Well, I finally found (made) time to dick with that front tire. While there are issues with the way the bead is seated, there's nothing that reseating or lubing can do about it, because the tire casing is warped in two planes.

I sent video to Bike Bandit and we're working on a replacement now.

manofsteele · Mar 20, 2012

I had an out of round rear tire that was transfering the vibration to the front (I gotta a hardtail), new tire, no more vibration.

Out-of-round tire

Downeaster

Everything in XS

gggGary

If not now, When?

littlebill31

Smells of Raw Fuel

Downeaster

Everything in XS

5twins

XS650 Guru

Dusty

Dusty

Tomterrific

XS650 Junkie

XSLeo

XS650 Guru

littlebill31

Smells of Raw Fuel

hooktool

XS650 Junkie

Downeaster

Everything in XS

manofsteele

XS650 Addict

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