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Old 05-26-11, 11:17 PM   #1
fugate
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tire not sitting in rim correctly?

hi. new.

got a '72 peugeot road bike. i can't remember if this has been happening since i bought these aluminum wheels late last year, but..

every time i change a tube/tire, when putting back the tire, i make sure the rippled "teeth" on the bottom edge of each side of the tire are uniformly peeking/stationed just above the top of the rim. but it seems that almost every time there is about 1/6 of the circumference of the tire where it is significantly sinking down into the rim. i try to prick it back up with a spoon, but it just appears that it's not sitting on the rim correctly. it's not a twist in the tube or anything, and it's hard to see but i don't THINK it's that the rimstrip is off to one side or something...

i usually can get it so it's not that bad, but this evening it seems to be a little more irreparable. thoughts? if i do end up riding on it anyways, how will it [negatively] affect my tires/wheels/whatev?

thangz for reading.
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Old 05-27-11, 12:14 AM   #2
Scrockern8r
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Uneven tire placement can cause problems. Fix it before you have to make the walk of shame.
Making it sit on the rim evenly is the priority. My practice is to put just enough air in the tire to hold it against the rim. I twist the tire sideways against the rim as necessary -working your way around the rim- to get it as even as I can. Do this on both sides. If it is problematic, I usually will do this in a couple/three steps while adding a bit more air to the tire each time. It never comes out perfect, but usually the variance is about 1/16th of an inch at the most. (thickness of a penny)
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Old 05-27-11, 12:28 AM   #3
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Try overinflating it until it pops in place then deflate to the correct pressure. The key words are "in place;" don't inflate it so much that it risks popping. Tires can hold a lot more pressure than they're rated for though.
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Old 05-27-11, 12:51 AM   #4
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Sounds like you are mounting tires desgned for hooked edge rims in straight sided rims. With this combination you cannot inflate your tires anywhere near the pressure printed on the sidewall without risking a blowout.
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Old 05-27-11, 01:44 AM   #5
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I pretty much follow post #2 pushing down the rest of bead rather than lifting up the low area inflating as I go. A little tire talc and a little over inflation at the end pops everything in to place nicely as in post #3.
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Old 05-27-11, 02:01 AM   #6
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i had a similar recurring problem with tire not seating properly. it turned out, after much, too much, time and effort, that it was the rim tape causing the problem. it had "ridden" up on the inside of the rim, preventing the tire from seating correctly. i ended up installing new VERY NARROW rim tape.

problem solved.

huey

i reread your post and saw that you dont think it's the rim tape. sooo... nevermind!

Last edited by hueyhoolihan; 05-27-11 at 02:05 AM. Reason: spelling
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Old 05-27-11, 09:51 AM   #7
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Try overinflating it until it pops in place then deflate to the correct pressure. The key words are "in place;" don't inflate it so much that it risks popping. Tires can hold a lot more pressure than they're rated for though.
This. 90% of the time, it works every time.
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Old 05-27-11, 09:58 AM   #8
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This. 90% of the time, it works every time.
????????
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Old 05-27-11, 10:03 AM   #9
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Where exactly on the rim is the tire sitting low? If it happens to be exactly opposite the valve stem try this:

1. Deflate your tire to about 5psi.
2. Push the valve stem straight into the rim. You don't have to go very far 1/4 to 1/2 inch is plenty.
3. Reinflate normally.

The area of the inner tube adjscent to the valve stem is thicker than the rest of the tube. Sometimes that thicker area gets caught under the tire bead.
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Old 05-27-11, 10:40 AM   #10
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????????
Uh, I was just agreeing that a little extra air pressure helps seat the bead uniformly around the rim, most of the time. Pardon my word-play.
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Old 05-27-11, 11:02 AM   #11
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A Kenda tire recently refused to seat on a 26" rim. I became frustrated after eight cycles of massaging the tire, and took Sheldon's advice. I turned up the pressure . . . to 120 psi. Either blow or seat. After a scrunchy rubber sound, it seated perfectly. I bled it down to 70 psi and rode.
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Old 05-27-11, 12:21 PM   #12
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Take spray bottle with some water...or some windex will also work. Spritz along the bead of the tire all the way round while turning the wheel. Gently inflate and knead the tire as you go and the tire should seat. The water/Windex acts as a temporary lub to help stubborn beads seat. Clean up your rims and you should be good to go.

Be cautious if you attempt over inflation along with this technique!
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Old 05-27-11, 07:36 PM   #13
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Uh, I was just agreeing that a little extra air pressure helps seat the bead uniformly around the rim, most of the time. Pardon my word-play.
I knew what you ment and frankly, I agree. I just couldn't resist the urge to poke a little fun. If you're offended, I apologize.
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Old 05-27-11, 09:17 PM   #14
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I knew what you ment and frankly, I agree. I just couldn't resist the urge to poke a little fun. If you're offended, I apologize.
Not offended at all! I'm the new guy around here, so I didn't know quite how to react.
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