problem mounting cheap tire

Steve and Amy Bernth said:

I bought a cheap Nashbar tire (700x23) to mount on an old wheel I had
to keep as a "spare tire". After I mounted it on the rim and began
to fill it with air, the bead on one side right next to the valve
(presta)started to work its way up and off the rim. I thought maybe
the tube was bunched up or something so I deflated it, took the tire
off, checked the tube, put the tire back on, same thing again when I
put air in it. It's like something is keeping the bead from seating
itself on the rim, but I can't see anything, there is no damage to
the rim, and nothing is wrong with the tube. Is this a case of you
get what you pay for, or am I missing something?

Does the unseating part of the bead feel different from the rest of the
bead?
--
Phil Lee, Squid

Steve and Amy Bernth said:

I bought a cheap Nashbar tire (700x23) to mount on an old wheel I had to
keep as a "spare tire". After I mounted it on the rim and began to fill it
with air, the bead on one side right next to the valve (presta)started to
work its way up and off the rim. I thought maybe the tube was bunched up or
something so I deflated it, took the tire off, checked the tube, put the
tire back on, same thing again when I put air in it. It's like something is
keeping the bead from seating itself on the rim, but I can't see anything,
there is no damage to the rim, and nothing is wrong with the tube. Is this
a case of you get what you pay for, or am I missing something?

Are you tightening the stem nut before you fill? If you are, try not using
the nut and pushing the stem up into the tire before you fill.

Bob

Steve and Amy Bernth said:

I bought a cheap Nashbar tire (700x23) to mount on an old wheel I had to
keep as a "spare tire". After I mounted it on the rim and began to fill it
with air, the bead on one side right next to the valve (presta)started to
work its way up and off the rim. I thought maybe the tube was bunched up or
something so I deflated it, took the tire off, checked the tube, put the
tire back on, same thing again when I put air in it. It's like something is
keeping the bead from seating itself on the rim, but I can't see anything,
there is no damage to the rim, and nothing is wrong with the tube. Is this
a case of you get what you pay for, or am I missing something?

Dear Steve,

Could be. "Damage" to the old wheel may be merely an almost invisible
spreading.

Try to mount a known good tire of the same width on the old wheel.

If the good tire creeps off the wheel in the same place, throw the
wheel away.

If the good tire stays in place, throw the cheap tire away.

Cheers,

Carl Fogel

Steve and Amy Bernth said:

I bought a cheap Nashbar tire (700x23) to mount on an old wheel I had to
keep as a "spare tire". After I mounted it on the rim and began to fill it
with air, the bead on one side right next to the valve (presta)started to
work its way up and off the rim. I thought maybe the tube was bunched up or
something so I deflated it, took the tire off, checked the tube, put the
tire back on, same thing again when I put air in it. It's like something is
keeping the bead from seating itself on the rim, but I can't see anything,
there is no damage to the rim, and nothing is wrong with the tube. Is this
a case of you get what you pay for, or am I missing something?

Nah, I just bought 5 of those cheapies myself. They've proven
themselves to as durable and nicely made as name brand stuff in the $20
range. I've used them for years on and off. Never had a dud. Now I have
bought tires that *were* poorly made, like the pair of 26x1 3/8s in the
garage that were 5mm out of round--so it does happen.

So definitely *could* be the tire, but I wouldn't blame it on those
*dang cheap tires*, just on bad luck. Could also be wrong rim width,
some other tube issues you're not catching, and so on.

Did you try inflating 10 psi at a time while bouncing the wheel gently
to get the bead to seat? Works for me sometimes.

Nashbar tires are the ones I've never had an isue with, FWIW, just a
normal puncture here and there. Otherwise they mount without levers,
wear pretty good, and are tires you can mount and forget. IRCs, Contis,
Hutchinson, WTB--I've had real [censored] tire examples with a lot of big
name logos silk screened on the side.

Quoted message said:

Could be. "Damage" to the old wheel may be merely an almost invisible
spreading.

Try to mount a known good tire of the same width on the old wheel.

If the good tire creeps off the wheel in the same place, throw the
wheel away.

But it's quite a coincidence that the area the tire tries to come off the
rim is adjacent to the valve... the one place most-likely to experience
problems due to improper tube installation. More likely, the new tire may
have a much-stiffer casing than what the OP has used before, and that makes
proper installation a bit more difficult, but is not an indication of either
a defective tire or damaged rim.

--Mike-- Chain Reaction Bicycles
www.ChainReactionBicycles.com

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Quoted message said:

Steve and Amy Bernth said:

I bought a cheap Nashbar tire (700x23) to mount on an old wheel I had to
keep as a "spare tire". After I mounted it on the rim and began to fill
it
with air, the bead on one side right next to the valve (presta)started to
work its way up and off the rim. I thought maybe the tube was bunched up
or
something so I deflated it, took the tire off, checked the tube, put the
tire back on, same thing again when I put air in it. It's like something
is
keeping the bead from seating itself on the rim, but I can't see anything,
there is no damage to the rim, and nothing is wrong with the tube. Is
this
a case of you get what you pay for, or am I missing something?

Dear Steve,

Could be. "Damage" to the old wheel may be merely an almost invisible
spreading.

Try to mount a known good tire of the same width on the old wheel.

If the good tire creeps off the wheel in the same place, throw the
wheel away.

If the good tire stays in place, throw the cheap tire away.

Cheers,

Carl Fogel

Robert Lorenzini said:

Steve and Amy Bernth said:

I bought a cheap Nashbar tire (700x23) to mount on an old wheel I had to
keep as a "spare tire". After I mounted it on the rim and began to fill it
with air, the bead on one side right next to the valve (presta)started to
work its way up and off the rim. I thought maybe the tube was bunched up or
something so I deflated it, took the tire off, checked the tube, put the
tire back on, same thing again when I put air in it. It's like something is
keeping the bead from seating itself on the rim, but I can't see anything,
there is no damage to the rim, and nothing is wrong with the tube. Is this
a case of you get what you pay for, or am I missing something?

Are you tightening the stem nut before you fill? If you are, try not using
the nut and pushing the stem up into the tire before you fill.

Like he said!

The thick area of the tube around the stem is pushing the tire out of line.

Ron

Mike Jacoubowsky said:

Quoted message said:

Could be. "Damage" to the old wheel may be merely an almost invisible
spreading.

Try to mount a known good tire of the same width on the old wheel.

If the good tire creeps off the wheel in the same place, throw the
wheel away.

But it's quite a coincidence that the area the tire tries to come off the
rim is adjacent to the valve... the one place most-likely to experience
problems due to improper tube installation.

Indeed, the reinforcing around the valve may coax the bead of the tire
off the hook of the rim. Just give it a little massage while inflating.
Marvin Gaye's "Sexual Healing" at about 30psi never hurt anybody, just
get it in there babe...

Thanks for the suggestions. I was able to get it to seat properly by taking
the stem nut all the way off and pushing the valve up into the tire.

SB