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Tire Not Seating - Another Thing To Check

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Tire Not Seating - Another Thing To Check

Old 11-15-21, 01:57 PM
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Tire Not Seating - Another Thing To Check

moderator please delete this double post - sorry
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Old 11-15-21, 01:58 PM
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Tire Not Seating - Another Thing To Check

Been humbled recently with mounting economical ChiCom made tires. They have actually been well worth the money but I have had a few issues. One of those issues has been the tire beads. On one of the tires the wire was not adequately covered with rubber and separated when mounted. Now I check all my tires closely ChiCom made or not. I was having some problems with a recent tire not keeping seated. It was not really a surprise as it is a Folding tire and needed time to conform to the shape of tire and tube. Still the bead would not hold even though it looked good. On feeling the thickness of the bead itself with my fingers I noted that it was appreciably thin at the place it would not seat. Measuring the thickness I noted a 2+mm change at the place it was not holding. Rats!!! So now I gotta check thickness of the bead too.... Ha




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Old 11-15-21, 02:12 PM
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Unsure what ChiCom tires are... Google didn't bring up any single brand or company when I did a quick search. Are you referencing a country of manufacturing?

Typically folding tires don't need any time to conform to a tube or rim. Some air pressure but the seating and shape should be pretty much done with inflation (excepting those hard to seat tire/rim combos). It would be odd if a tire need to sit before it became shaped as intended. (And I'm not talking about glued on sew ups)

A couple of MMs of tire bead dimension differences on the same tire does seems to me to be a big tolerance range. One that would not instill confidence in the tire's manufacturing or even safety perhaps. That much difference would make me consider returning the tire and maybe getting another brand. Have you shown it to the shop where you bought it? (Knowing that most likely the tire was bought from an online source).

We have seen a general drop of quality in many parts/bikes made since the pandemic began. There are a number of likely reasons for this. Andy
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Old 11-15-21, 04:35 PM
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I'm a little confused. Probably a normal state of mind for me, but I'm not sure from your post what your issue is.

Are you not able to get the last part of the bead over the rim? Or is the tire bead popping off the bead seat of the rim?

For either, I think the varying thickness of the tire bead is irrelevant.
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Old 11-15-21, 04:43 PM
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Originally Posted by Iride01
...I'm not sure from your post what your issue is.
Sorry... Let me clarify... The bead is simply not thick enough or rather high enough, to grab the edge of the rim. I have not had problems with tire mounting and beads before and suspect this to be a matter of recent problems with quality control during manufacture.
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Old 11-15-21, 04:53 PM
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So when the tire is on the rim completely, there is a gap between the rim and tire when inflated? Still having trouble understanding why 0.28 mm or less than 1/64th of an inch is a problem.

ooops, missed the first pic when I scrolled back up...

But air pressure on the inside doesn't really care how thick it is. It should still seat to the rims.
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Old 11-15-21, 04:53 PM
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Originally Posted by Andrew R Stewart
Unsure what ChiCom tires are...
Understood... Simply put "Made in a Chinese Communist Country"... and the list of those countries is changing. Unfortunately it includes many Bicycle Tire and part manufacturing plants.
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