Tyre Explosion!

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John-Paul

New Member
I started commuting again after the clocks went forward and I plan to carry on through the winter (well that's what I say now!). I decided to buy some puncture resistant tyres for my journey which is 12 miles each way along the south coast.

I bought Schwalbe Marathon Plus 28 after reading a few blogs and forums. They arrived and I fitted them on my 700c wheels. I thought at the time that the tyres were slightly 'baggy' on the rims and was a little concerned that they might come off as little or no force was needed to push the beads over the rims. However, I fitted them evenly around the rims and pumped up to about 60-70lbs.

I had done about 500 mies on these tyres when I was sitting at my desk at work and there was an almighty BANG (followed by another an hour later). I went out to inspect my bike after lunch and both inner tubes had exploded. (tyres look fine though).

I wonder has anyone else had a similar experience?
Shouldn't tyres require a little more effort to fit?
 

steve52

I'm back! Yippeee
i found then easy to put on too ,a long time since ive not had a folding tyer im running 110 psi and haveing no prbs , maybe you had a bit of tube traped in the bead? that seems a bit on the low side presure wise to me but hay ho what would i know
, my attitude to cycling is just keep peddaling just keep peddaling just kee-----___________ ectect
 

frank9755

Cyclist
Location
West London
Both tyres exploded at the same time? My first thought was that you should buy a lottery ticket!

Was the bike in hot sun? I've heard of inner tubes exploding when a bike was left in a car on a hot day, but never outside. 60psi is a very low pressure for 28s so even more puzzling.

I can't see it being anything to do with the tyres, which are usually harder than average to put on due to their stiffness.
 

Beebo

Firm and Fruity
Location
Hexleybeef
Tyres shouldnt go bang when a bike is sitting around.

The only things that would cause that are an increase in pressure or a sharp object. I dont know where you store your bike but I would suspect foul play from someone tampering with it, OR it could be possible that the tyres got too hot was the bike was stored in direct sun light?
 
Tyres shouldnt go bang when a bike is sitting around.

The only things that would cause that are an increase in pressure or a sharp object. I dont know where you store your bike but I would suspect foul play from someone tampering with it, OR it could be possible that the tyres got too hot was the bike was stored in direct sun light?

This is a worrying escalation....

We all know that our old friend the P*nct*re Fairy has had problems with the Marathon Plus .... now she has taken an explosives course!

What will the tyre manufacturer's reply be to this?
 
OP
OP
J

John-Paul

New Member
Hi, thanks for your replies.

The bike was sitting in a bike rack in full sun for 4 hours. One tyre went bang and the other an hour later.

Interesting about the sun. Maybe the sun heated the tyres and beads so much that they expanded and blew though a gap between the tyre and the rim? Is that possible? The pressure may have been a little more, but not much more because I used a small hand pump to top them up.

I think it's unlikely to be inner tube trapped as both tyres went bang and I'd already cycled 500 miles on them.
 

sleekitcollie

Well-Known Member
I've has experience of this once . I was out on my 1st ride with cc ecossee and we stopped at Blackness castle for a break ( don't cycle on the grass guys ;) ) we had been there for 15 min or so when there was a huge bang that shook the ramparts of tge castle send people scurrying for cover and birds made off in fear of there lifes . It really was a huge bang . On inspection of the bikes mine was found to have the back tyre blown off the rim on 1 side and a 6 inch split in the inner tube . . We found nothing in the tyre and after replacing the tube I was able to get the tyre back on and cycle home ( 5 miles ) even with the bead being slightly damaged . Scary thing was we had ( only 30 min b4 ) descended from the Bathgate hills at 49 mph , don't know if that had something to do with it . Tyre's came supplied with spez tricross sport & were at max psi .
 

sleekitcollie

Well-Known Member
Sorry decent from hills should read 40mph not 49 ;) . Message posted from I phone . Small keypad big thumbs lead to 9mph increase in downhill speed ( can't edit from I phone hence this post )
Sorry guys
 

al-fresco

Growing older but not up...
Location
Shropshire
I've had an inner tube split on the inside (i.e. the bit that's against the rim tape) which I put down to over inflation and cheapo wheels.
 

frank9755

Cyclist
Location
West London
I've has experience of this once . I was out on my 1st ride with cc ecossee and we stopped at Blackness castle for a break ( don't cycle on the grass guys ;) ) we had been there for 15 min or so when there was a huge bang that shook the ramparts of tge castle send people scurrying for cover and birds made off in fear of there lifes . It really was a huge bang . On inspection of the bikes mine was found to have the back tyre blown off the rim on 1 side and a 6 inch split in the inner tube . . We found nothing in the tyre and after replacing the tube I was able to get the tyre back on and cycle home ( 5 miles ) even with the bead being slightly damaged . Scary thing was we had ( only 30 min b4 ) descended from the Bathgate hills at 49 mph , don't know if that had something to do with it . Tyre's came supplied with spez tricross sport & were at max psi .

Using brakes on a fast descent can heat up the rims to high temperatures and cause the rubber to disintegrate. Sounds most likely in your case.
 

sunnyjim

Senior Member
Location
Edinburgh
I've had a marathon explode like that- bike sitting in the lobby, about an hour after I'd replaced the tube - Bang!.
The hole was a long slit, so I'd probably nipped it against the rim. IIRC there was/is an explaination of the delayed bangture effect on Sheldon Brown's site.
 
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