Bubble Tire


Information and questions on GL1500 Goldwings (1988-2000)
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TAZZ
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Bubble Tire

Postby TAZZ » Thu Jun 05, 2014 12:23 pm



I was going to a Doc. App this morning an down the street from my house I felt my back tire bumping up and down I stop to look at the tire and I see this! My rear tire is a Dunlop E3 with about 20k has any of you seen this on your tire.
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Re: Bubble Tire

Postby WingAdmin » Thu Jun 05, 2014 12:35 pm

TAZZ wrote:I was going to a Doc. App this morning an down the street from my house I felt my back tire bumping up and down I stop to look at the tire and I see this! My rear tire is a Dunlop E3 with about 20k has any of you seen this on your tire.


You're very lucky. I have seen this on a tire before (although it was a car tire, not a motorcycle tire). This is a tire that is on the verge of blowing out.

This can can be caused by damage to the tire (pothole, running over sharp object), or a manufacturing defect. Either the tire was pushed inward enough that the inner layer has failed, allowing air to escape through to an outer layer, or some other defect has caused the layers to separate. In some cases it can also be caused by insufficient inflation.

In any case, the layers inside the tire have separated, and it is these layers that give the tire its strength. It's only a matter of time before this tire fails completely (and usually catastrophically). Time for a new tire.

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Re: Bubble Tire

Postby thrasherg » Thu Jun 05, 2014 1:38 pm

That tyre is dead!! If you got 20K miles on it, it's about ready to be changed anyway, but that bubble indicates a failure inside the tyre construction. you should NOT drive any further on it, good call to stop & check the tyre when you felt the bumping. Very lucky catch.

Gary

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Mh434
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Re: Bubble Tire

Postby Mh434 » Thu Jun 05, 2014 4:04 pm

Wow! Delaminations like that are uncommon and, on motorcycles, are frequently followed immediately by catastrophic blowouts, usually at speed! :shock:

Good on 'ya for stopping immediately. Your vigilance probably saved you & your bike from a world of hurt.

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Re: Bubble Tire

Postby ct1500 » Thu Jun 05, 2014 6:50 pm

I too have seen that on a car and was due to a tire injury from a road hazard.

At the top of injury is the split where initial contact was likely made and at the bottom of injury is a whitish vertical line in the good tread block or the blackish triangle area just to the right where contact finished. The injury would have been in the recent past mileage wise.

Could be the angle but the picture shows very little crown of tire likely due to under inflation for a long time would be a guess.
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Re: Bubble Tire

Postby kwild » Thu Jun 05, 2014 7:56 pm

Looks like you took a sharp hit to the tire just below the top groove. With 20k that tire had to be worked over anyway, and the sharp hit must have broke the inner linings. 20K is a lot of miles for a rear, almost double what I get out of the same tire. I run bias ply tires though. We have all probably push a tire or two beyond their expected lifespan, I'd say that bubble did you a favor. Glad you caught it before "POP".
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Re: Bubble Tire

Postby harvey01 » Thu Jun 05, 2014 8:04 pm

I had a similar bubble on a Dunlop Elite tire back in the early 1990's. I was travelling at the time and had to have the tire replaced(long story) so when I got home I sent a letter to Dunlop with photos of the tire and the bubble. Several days later I received a phone call from a Dunlop representative. Long story short, the company felt the problem was caused by a manufacturing mistake.

Dunlop would not reimburse me my motel bills for the couple days my son and I were in Pecos, Texas, but they did send me a new tire.
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Re: Bubble Tire

Postby ct1500 » Thu Jun 05, 2014 9:16 pm

I rode this E3 for all it was worth with local riding only towards the end and got 25.5k miles. ;)
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TAZZ
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Re: Bubble Tire

Postby TAZZ » Mon Jun 09, 2014 11:16 am

Thank all I have a question for some out you that say UNDER INFLATION I run my Dunlop tire at 40psi is the under what do you guys run your rear tire at :?:

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Re: Bubble Tire

Postby harvey01 » Mon Jun 09, 2014 2:29 pm

Tazz,

When I had my problem, the rep from Dunlop assured me it had nothing to do with under/over inflation, riding in heat on a hot road or anything that I did or failed to do. He said such a bubble was caused during the manufacturing process, perhaps someone inadvertently touched where he should not have or something else when the tire was made. Obviously they assumed all blame as they gave me a new tire and shipped it to me.
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TAZZ
Posts: 139
Joined: Tue Aug 25, 2009 11:46 am
Location: Del Rey CA
Motorcycle: 1997 Honda GL1500se
1968 Honda CL350 Scramble,
1970Honda 750k,1976 Suzuki GT550,
1979 Kawasaki 1000st, 1983 Suzuki GS1150se
1986 Kawasaki Ninja 1000R
1981 Honda CBX (not for sale)
1982 Honda GL1100 Aspencade 1994 Yamaha700

Re: Bubble Tire

Postby TAZZ » Mon Jun 09, 2014 3:25 pm

Ok guys Dunlop Rep. just call me and say the my tire is 7yr old and I got 20k out off it is NOT under warranty anymore the warranty is 5yr the Bubble was cause tire was OLD and 20k I'm just glad it having by my house and I was going about 10-15 mile and in the FREEWAY at 70m. with wife. Thank All.

harvey01
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Re: Bubble Tire

Postby harvey01 » Mon Jun 09, 2014 3:38 pm

Heavens Tazz,

That tire was 7 years old with 20,000 miles, you have no complaints. Probably should have been replaced 4 years ago if wife was riding on the bike to protect her.


harvey
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