Burst Tyre

Has this happened to anyone else?

This morning I put a bit more air into my tyres (120psi), rode to work fine, parked my bike in the office (electronics lab), then 20 minutes later bang, everybody craps them self thinking something large and electronic has blown up, but it happends to be my rear tube has gone pop! I've been riding to work on this tyre for the last week and a half, storing the bike in the lab in the same place, no problems.

any idea what may have caused this, the wheels are mavic open pros, the tubes are specialized std 700c x 20-28 and the tyres schwalbe marathons in 700c X 28. I know I'm at the upper end of tyre pressure limits, but why has it not gone before when I've been hopping up a kerb or similar and go now when it was just stood in the corner of the lab!!!

wheres it blowing?
you putting it somewhere hot?

it was leaned up next to a radiator, but that was barely warm, the lab is a reasonable temperature, and it was pretty cold outside when I pumped them up to 120psi. I'd be suprised if the change in temp (probably 15deg) was enough to raise the pressure in the tyre to burst it.

run you fingers round your rim (!) sometimes a little ding in that can cause many flats in a row... happened to me pissed me right off, mavic open sports though...

may have caught the edge of the tube in the tyre and finally blew???

Meh, I'll pull the tyre off at lunch time and see where it split.

i put some 700x25 gatorskins on a friends bike and went through 3 tyres, couldn't believe it :(

hmmm maybe check your tape as well? spoke?

I reckon it's the tube caught underneath the tyre. It's happened to me before. The first time I thought I'd been shot.

I also had this when I was using an ancient rim and tried to get past 100psi. Got through 3 (admittedly, also old) tyres before setting for 90psi. I suspect the rim was bent somewhere and pushed into the tube at high pressure.

i had this problem, happened with two tubes in a week, sounded like a shotgun going off.

Problem was I want pump it up just with a hand pump so couldnt have been near capacity pressure, then a bulge would appear in the tyre. I wouldnt notice the bulge tili was riding and would feel a bump. I bought new tyres and the problem stopped. I think the tyres just got weaker and weaker through the years,cos I had them for about a year and a half.

How old are your tyres?

dogsballs may have caught the edge of the tube in the tyre and finally blew???

Trapped tube between tyre and rim, caught me out this week too
I'm with "canine testicles" on this one

Put talcum powder on your rim errrr well actually on your tube, stop things getting so caught up in the lever/rim/tyre/tube bidniz. Am I stating the obvious? Sorry ...

Skullhead Put talcum powder on your rim errrr well actually on your tube, ...

Are you referring to the wheel problem or just thinking out loud about your usual foreplay methods?????

Well, the tube has a 1" long x 1/16" but missing where it blew, and the tear then extends 3-4" beyond either end of this, the bead of the tyre on that side has had the surface pulled off where it hooks under the edge of the rim. IMHO despite being careful I must have caught the edge of tube under the tyre bead.

must be more careful in future, anyone got an idiots guide to fitting tyres properly, or is it just a case of plenty of talc round my rim and be careful ;)

with bigger tyres, i inflate to 20-30 psi, then deflate to check, then inflate to max psi

always put a little bit of air in the tube, just enough to give it shape, it will less likely get caught between the rim, once tyre is seated run the tyre between your fingers pulling away from the rim, to properly seat tube, then pumpity, pump,pump, pump!!

I usually get the tube in, get the tyre on over the bead, put a few PSI in and then pinch the tyre, pulling it away from the rim and look to check the tube is not visible, so cannot be pinched between the tyre bead rim. evidently this is not quite good enough and I must have nicked it.

I hope I'm not stating the obvious, but many cheaper rims can't cope with pressures much over 100psi.

fair point. but I thought Mavic open-pros were fairly decent rims. its not like I'm having a catalogue of tyre failiures, I just want to know why this one went so It doesn't happen again for the same reason.

BillB fair point. but I thought Mavic open-pros were fairly decent rims. its not like I'm having a catalogue of tyre failiures, I just want to know why this one went so It doesn't happen again for the same reason.

Yeah, they are. I was speaking more generally. My guess, like a lot of the preceding posters, is that it was the tube/tyre interface. Probably won't happen again for a long time.... fingers crossed.... ;-)

MR Brown...

http://www.sheldonbrown.com/flats.html

if your tube was pinched the temp change probably put it over the edge, one summer day i had a puncture in the front wheel in front of the cop shop, had the bike upside down while changing the tube the rear blew out (had put it up to max that morning when it was cool) had one of the coppers dropping to the ground.