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Old 03-24-07, 09:42 AM   #1
Drew12
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exploding tire!!

Getting ready for a ride this morning, taking my time so it can warm up a bit first.
Pump up tires,
get snack ready
reset computer
go fill water bottles....


BAMM!!

What the F is that?? somone shooting???
I can't hear now....
No, my tire exploded. ( Well actually, the tube, the tire looks OK0.
Now, these are brand new tires, never ridden, and new tubes.
HHmmmm,
I put these on 4 days ago, and everything is OK.

I put 120 psi in, which is a little more than I usually run, but it seemed OK.
What is the correct pressure??
100... 110... 120
What's your pressure!

I really don't want to have this happen a give me a coronary, or on a fast down hill.
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Old 03-24-07, 09:49 AM   #2
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If you haven't ridden the new tires/tubes it's most likely a pinch flat from the tube getting caught between the rim and the tire bead during installation. Maybe pumping the tires up to 120 psi was enough to trigger the flat if you pumped them up to a lower pressure earlier. Better at home than on the road.

120 psi shouldn't be a problem in general.
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Old 03-24-07, 10:08 AM   #3
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Quote:
Originally Posted by Indolent58
If you haven't ridden the new tires/tubes it's most likely a pinch flat from the tube getting caught between the rim and the tire bead during installation. Maybe pumping the tires up to 120 psi was enough to trigger the flat if you pumped them up to a lower pressure earlier. Better at home than on the road.

120 psi shouldn't be a problem in general.

I was really careful when installing the tires.
looked closely to avoid just that.
Might have not seen it I guess...
Or maybe the pump guage ( sounded like a 12 guage) is off.
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Old 03-24-07, 10:16 AM   #4
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yeah sounds like maybe the tube snuck around the bead....either that or there is already a slach in the tire that the tube is poking out of...sometimes guys get a little crazy with box cutters when there in a hurry to restock!
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Old 03-24-07, 10:43 AM   #5
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I would check the rim tape to make sure it's not onlt in place but also there are no indentation at the nipple hole. That did happen to me more than once. Especially when I went to the upper psi limit.
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Old 03-24-07, 10:59 AM   #6
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One of the tried and true methods that I always use to avoid this is to pump the tube all the way up maybe even beyond the max and then deflate and inflate again. As it deflates it will usually pull out of any gaps it may have worked into during installation.
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Old 03-24-07, 11:02 AM   #7
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I've had a new tube explode a few minutes after installation. Nice long cut in it, perhaps 4-5 inches long. I suspect I just accidentally pinched it a bit.

In any case, I've become a believer in the approximate tire pressure recommendations on the Michelin Pro2 Race packaging. As such, I typically run 80 psi front, 90 psi rear using 23mm tubes. I weigh about 140. I used to run 110 psi front, 120 psi rear, but there really isn't any need for nearly that much pressure when the tires are holding up a mere 165 pounds or so (rider + bike + gear).
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Old 03-24-07, 02:44 PM   #8
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Sounds like a pinch flat. I had it happen to me a few weeks ago as well.

I inflate to 120 psi without any problem.
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Old 03-24-07, 02:46 PM   #9
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Thanks for the ideas as to what could have occured.
I ran 110psi on my ride today, and all was well.
I'll take the time to check the rim tape, and nipple hole.

But like jschen mentioned, 120 is probably overkill.
I'm at 165-170, so with all gear and bike, maybe 190 max.

So today is tire awareness day #2. Off to get some more tubes.....
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Old 03-24-07, 02:51 PM   #10
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happened to me once, it felt like I lost hearing in my right ear.

This happened when I was pumping up the tires, popped around 100psi, awhile ago, not tire related. It was result of ****ty tubes.
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Old 03-24-07, 05:25 PM   #11
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Way to go Drew, that has happened to me 3 times...
The last time I took my wheels of to install new Tires...I'd just got one fully inflated just as one of the Cats was walking by and BOOM!! I've never seen a Cat run so quick!!

But yeah, 120 is a bit much...
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Old 03-24-07, 09:56 PM   #12
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This happened to me just today - I came back to the car from a stop at Walgreen's and was checking my bike (mounted on the rack) before I left. I found one bead of the front tire blown clean off the rim and a long slice in the inner tube. At first I thought it was a seem failure, but upon closer inspection, I had a small pinch on the side of the tube and it split open like an over-done bratwurst. Luckily it happened in the parking lot and not while descending. Gotta watch those pinches!
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Old 03-24-07, 10:40 PM   #13
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Quote:
Originally Posted by Jaguar27
But yeah, 120 is a bit much...
My tires are pumped to 120...standardly.
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Old 03-24-07, 10:47 PM   #14
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I use 110 front and rear. I've had 2 blowouts at 120. I can't remember why I tried 120; must have been some reason.
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Old 03-24-07, 11:04 PM   #15
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i've had a roadie tire blow up at 110psi in my bedroom when I w prepping it for the next day..yah it was loud.
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Old 03-25-07, 12:19 AM   #16
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135 all the time.
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Old 03-25-07, 09:09 PM   #17
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Better that it wasn't a Slime tube...I had a slime tube go off in my face once.

Once.


It was like a Jenna Jameson 'film'.
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Old 03-25-07, 09:52 PM   #18
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Quote:
Originally Posted by Mo'Phat
Better that it wasn't a Slime tube...I had a slime tube go off in my face once.

Once.


It was like a Jenna Jameson 'film'.

Thsat sounds so,..... dirty....
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Old 04-08-07, 12:11 PM   #19
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After Solvang Double, I put my bike in my car, and drove home for Northern California in the morning. I didn't get any flats of any kind during the ride ... in fact, I probably rode about 1000 miles on the same pair of wheels. So I go northbound on 101, then soon after passing Los Alamos, I heard a huge resounding pop. At first I thought I had a blowout on my car. No smoke or anything. Then, I open the hatch, and it was my front tire. Next time, I'll deflate my tires when driving over long distances, especially with elevation changes.
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Old 05-31-07, 05:39 AM   #20
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I was on a ride yesterday, and my rear tire exploded. I had just repaired a flat on that tire prior to the ride, so I was assuming what everyone else has said, a pinch flat. It blew the tire off the rim, and left about a 6 inch tear in the tube. This is why I always pack an extra tube, as well as a patch kit.
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Old 05-31-07, 07:23 AM   #21
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110psi for me
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Old 05-31-07, 07:34 AM   #22
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I tip the scales at 215 without the bike and I run 110. Used to run 120-130 for races and you do get a little extra zip, but you feel the road a lot more. I have seen the bead slip off a rim at higher pressures, but that is usually with beach cruiser type wheels and tires (big and cheap)
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Old 05-31-07, 08:10 AM   #23
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Quote:
Originally Posted by Mo'Phat
Better that it wasn't a Slime tube...I had a slime tube go off in my face once.

Once.


It was like a Jenna Jameson 'film'.
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Old 05-31-07, 08:37 AM   #24
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Can I ask if you used tools to install the tires? That's why I learned to change tires without tire irons, there is just too much of a chance to pinch them, no mater how careful you are, it happens.

Sometimes new tubes right out of the box have defects in them (I had 2 out of 4 Bontrager tubes that had tears in them right out of the box).

I run 120 in both tires ALL the time and have never had a problem, but I never use tire irons.
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Old 05-31-07, 08:39 AM   #25
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Has anyone noticed how many "pinch flats" come very soon after someone has fixed a tire?
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