Brand new front tire went flat at 80MPH! What caused it?
- bLodi
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Had a brand new Kenda K671 100/90-19 and brand new tube mounted and balanced. Put it on the bike and went for a cruise, put probably 20-25 miles on it at about 40-45 mph, then decided on the way home to hop on the freeway. Opened it up a little bit and was coming up to my exit and suddenly I could tell something wasn't right, it was pulling and felt wobbly. I looked down and sure enough the front tire was flat! Well I eased the speed down and pulled it onto the shoulder of the exit. Can't believe I didn't get hurt or dump it. I nursed it up to a safe spot right off the exit. The tire was dead flat.
So I called my wife, she picked me up, I brought my air compressor back to it and it filled up just fine! I rode it the few blocks home (very cautiously).
So I plan on taking the wheel off and taking it into the shop again tomorrow and having them look at it all and remount and balance it.
I guess my big question is. What could have caused this??? It holding air fine now, and was for the 25 or soe miles before that, but I don't want it happening to me again. Any ideas?
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- bountyhunter
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FYI, I always run Slime sealer in my tires to hopefully prevent sudden flats.
1979 KZ-750 Twin
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- jjdwoodman
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Seriously, I wonder if your tube was pinched during mounting or picked up a hole or something and in the process of going flat it shifted so the holes are now misaligned? It's a long shot, but except for the afore mentioned valve stem, it's all I come up with. When you find the answer to this mystery, let us know... Enquireing minds you know...
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- PLUMMEN
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Still recovering,some days are better than others.
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- bountyhunter
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1979 KZ-750 Twin
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- BSKZ650
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77 kz650, owned for over 25 years
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- Z1R rider
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- bountyhunter
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I am thinking valve problems, as for tire sealer, I only use it in a emergency sitiuation, the stuff moves around in the tire and will cause the tire balance to change all the time, plus its nasty as hell to clean
Actually, it does move to whatever place minimizes the wheel vibration (all systems migrate to lowest energy state). It actually improves balance, it used to be sold as balancing fluid.
Protects Balance: True Goo acts as a good balancing fluid. The low viscosity of True Goo has been engineered to put it in the "Sweet Spot" for tire balancing (if True Goo were thinner it would not balance tires as well, and conversely, if True Goo were thicker it would not balance tires as remarkably as it does). The thin film of True goo that coats the inside of the tire dynamically adjusts to balance the tire as the tire rolls.
The problem is, you must balance the tire first before putting it in or it will mess with the spin balancer.
It is slimy, I would not put it in a tubeless tire....
1979 KZ-750 Twin
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- bLodi
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I took it back to the shop. They took it all apart and checked the tube, tire and rim all out and said everything looked fine. They were as perplexed as we all are.
So they mounted it all up again. I put it back on the bike, but havn't had a chance to take it out for a spin yet, but its sitting in the garage holding air just fine.
The only thing I can come up with other than if it was a valve issue, is if part of the tube got stuck between the rim and the tire when it was mounted, then on the freeway it worked its way free and so suddenly there was extra volume to the tube thus, the air pressure suddenly dropped. Make any sense?
Hopefully I never have to experience that again though...it was scary.
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