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Clincher tires not "clinching"?

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Clincher tires not "clinching"?

Old 06-02-07, 06:03 AM
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Collegefour
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Clincher tires not "clinching"?

Today I ran into a problem I've never had before. I have Kenda Kontenders (700x23) on my road bike. It came with them. I pumped both tires up to 120psi. The front tire was fine, but about ten minutes into my ride, the rear tire was actually lifted up off the rim by the tube, on BOTH SIDES. I heard the rubbing sound and managed to deflate the tire before the tube blew out, but I could not reseat the tire and get it to hold at any more than about 75psi. I limped it home, threw on a different tire, and it's good as gold. Anyone ever have a weird tire that wouldn't "clinch" anymore?
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Old 06-02-07, 06:49 AM
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Kenda Kontenders...
Good tires are not cheap,
Cheap tires are not good. Get it?

IMO, you get what you pay for in terms of quality in regards to tires.
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Old 06-02-07, 11:52 AM
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johnny99
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What rims are you using?
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Old 06-02-07, 02:29 PM
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I run a cheaper brand of higher pressure tire (ricorso) that I used to keep up near 110psi or more. Same thing happened to me....still have the same tire but now run around 95psi. Cant tell the diff. When I wear these tires out I'll spring for a better brand high pressure tire.

I like running higher pressure but really cant tell the diff in that 15psi or so lower pressure.
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Old 06-02-07, 03:07 PM
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I'm no shop mechanic but it sounds like your rims are too wide for 23 width tires. Given a poor fit some grades of tubes inflate more at thin points on their circumference and could lift a loose fitting tire off of the rims.. Suggest fatter tires, thiner rims, better tubes.
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Old 06-02-07, 04:41 PM
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Old rims do not have the hook that newer rims have. I have accidentally blown tires off my wife's older Cannondale twice. Be careful with these rims. If you really like the bike and want to ride high pressure tires, I would get a better wheel set, or at least have the wheels rebuilt with hooked rims. My solution was to limit the bike to 80 psi tires.
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Old 06-02-07, 06:04 PM
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same thing has happened to me with ricorso's too. Their max psi is total bull.
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Old 06-03-07, 06:02 AM
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Collegefour
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Cool, thanks guys! *Mental note, cheap tires = no good*
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Old 06-03-07, 11:24 AM
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The Conti Ultra Sports I'm rolling on are cheap and aren't too bad of a tire. I keep them at around 120 and have never had an issue with them coming off the rim
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Old 06-03-07, 01:57 PM
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I've never been able to get a Vredenstein Fortezza to stay on my Bonty's. Gave 'em to my buddy, they blew off his Shimano's, too. Some tires are made with tighter beads than others, just as some rims are larger than others.
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