Psi blowout!

[runner]

I was under the impression that I could pump my racing tyres up to 120 psi....but doing just that the other day I had a blowout...the side of the innertube was ripped to pieces. I have been told in good faith by my LBS that 120psi is ok but it is the max....should I lower my expectations...I pumped up the tubes today to 105psi with no problems...so I guess I should stick to this...anyone have similar problems?

 

[ianrauk]

What is the max psi stated on your tyres?

 

[endoman]

You likely had the tube trapped around the rim somewhere. Happened to me a couple of times, now I make sure I check it's fully seated very carefully. They will easily hold 120 psi if that's what you desire.

 

[ianrauk]

You likely had the tube trapped around the rim somewhere. Happened to me a couple of times, now I make sure I check it's fully seated very carefully. They will easily hold 120 psi if that's what you desire.

Yup, that would be my guess.
Easy done.

 

[Keenbfb]

I know that I can get 120 psi into mine without a problem.

 

[Sittingduck]

Even if the tyre says max psi 120, I reckon it wouldn't breach until you had put in waaaay over that pressure. The rim would probably go before the tyre?

 

[CopperCyclist]

Tyres can hold PSI easily when rated to do so - as above, the true maximum is normally higher than the 'rated' maximum. However, the issue is that the higher the PSI, the more any problems will be heightened - tube trapped normally means a blow out, weakened side walls would be the same.

 

[sabian92]

You can easily put 200PSI+ into a tube so it was likely pinched. Try to be a bit more careful when you fit them and you'll be fine It's easy done though.

 

[runner]

thanks for that guys....you could be right the innertube must have been trapped...there was a hell of a rip along the tube wall...just have to be a little more careful on fitting

 

[Schneil]

Seconded - If it's a spontaneous blowout, its a trapped tube.
Happened to me in a confined space. Another chaps roadbike tyre blew. I couldn't hear for the next 15 mins!