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Old 04-28-2013, 09:39 PM   #1
Joined: Apr 2004
Location: Gig Harbor, Wa.
Oddometer: 51
Tire change question, need help.

When mounting a tubed tire is vertical centering of the tire critical when putting air in the tube. I am seeing a quarter inch difference between one side of the wheel and the opposite side. I have deflated and reinflated several times and resoaped the rim to reduce friction but it just won't center radially on the rim. I am wondering if just riding it won't cause things to center up due to centrifigal force and tire loading.
The tire is a 3:00x21 Avon Distanzia on a Yamaha XT 250. I am seeing a similar thing with the back tire which is a 120x80x18 Avon Distanzia.
Any suggestions or advice out there?

George K
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Old 04-28-2013, 09:46 PM   #2
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Joined: Feb 2007
Location: Corvallis, OR
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Sounds to me like the bead hasn't seated. What happens if you put 50 lbs of air in it?
There is no problem so big you can't make it worse
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Old 04-28-2013, 10:06 PM   #3
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Joined: Oct 2011
Location: Bucharest
Oddometer: 77
Are those tires you are mounting marked as TT or TL? Especially if they are marked TL they may require a much higher pressure for the bead to seat properly. IIRC my TL marked anakees required several reinflations up to around 70 psi and a lot of soapy water to seat properly (on normal spoked rims using tubes). By contrast the TT MT21s required only 40psi and no re-inflation at all.
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Old 04-28-2013, 11:18 PM   #4
Joined: Dec 2009
Location: Las Cruces, NM
Oddometer: 308
I always spray a little silicone spray lube on the rim. Helps the tire "blomp" onto the thingy. Works well.
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Old 04-29-2013, 06:54 AM   #5
Joined: Apr 2004
Location: Gig Harbor, Wa.
Oddometer: 51

Thanks guys. They passed the overnight leak check so I think I will do a test ride to see how lumpy they are, or are not, and to see if bead dimensions change. If needed I will deflate, lubricate with silicone spray, and re inflate to higher pressure as suggested.
They are S rated tubeless with a tube so a bit of a bastard configuration...
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Old 04-29-2013, 10:19 AM   #6
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Joined: Apr 2011
Location: Pittsburgh
Oddometer: 2,632
you need to get the bead seated. i wouldn't trust riding at street speeds without it being seated myself.

when i have a bead that doesn't want to seat, i spray a bunch of dish soap/water mix in/on/around where it won't seat. then i pump them up to about 70 or 80psi (DOT knobbies that i actually run at 8 to 20psi depending on terrain). then i put the tire near a heat source or our in the sun so it warms up.

never had one not seat after a few hours with high pressure in it and sitting near a heat source (warms up the tire and makes it more pliable so it slips over the bead easier and also increases the air pressure inside while it heats up).
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Old 04-29-2013, 10:26 AM   #7
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Joined: Aug 2005
Location: Da UP, eh! (Marquette, MI)
Oddometer: 2,877
I have found that bouncing the tire/rim combo like a basketball while rotating it slightly between each bounce, helps to "push" the bead into the proper location.
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Old 04-29-2013, 11:02 AM   #8
Joined: Apr 2004
Location: Gig Harbor, Wa.
Oddometer: 51
Good info!

Thanks again. I will work the problem before the ride as suggested. Good idea on the high pressure and sunshine. I had been tenative about using such high pressure but it sounds like it has worked for others safely so I will give it a try. I did try the bouncing techniue which has worked before but these two tires are tough customers...
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Old 04-29-2013, 11:21 AM   #9
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Joined: Jan 2006
Location: Ridgefield, WA
Oddometer: 2,732
i always talc my tubes, and put a little on the bead. that helps.
if they do what yours are doing, i pull the valve stem to de-air and smoosh the tire around a bit, then air up again.
go up to 40 or 50 psi and let them sit a bit.
none of us is as dumb as all of us
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