Hi there
i have some 40psi 150 x 26 tyres. but, inflated fully, they are not very hard and as i am using them racing, i would like them to be harder. can i over inflate the tyre? what could happen if i do this?
i dont really want to buy another set, but i will if i have to
cheers
2007-07-11 11:37:46 · 14 answers · asked by Anonymous in Sports ➔ Cycling
There's a couple of things that could happen. If you overinflate the tube, the most immediate thing that could happen is the tube will explode (I've done it before at 5am using a petrol station's compressor on my mountain bike!)
When riding with the tyres at higher pressure than the manufacturers maximum rated pressure, more than anything you're just asking for an uncomfortable ride. The tyres are the first line of shock absorption on your bike, and having them too "hard" will result in a loss of this, and you'll fell all the bumps of the road.
There's also the risk of the bead popping off the rim under excess pressure, but you would have to pump it up quite far for that to happen, and I think the tube would blow out before you even rode it.
But... I never heard of a tyre with a maximum pressure of 40psi. MINIMUM maybe... but not maximum. Most moutain bike tyres have a max rating between 60 and 65psi, and road tyres higher still... so please check you read it right.
My MTB tyres are rated for 40-65psi, and I tend to run them around 60 for road use (less rolling resistance) and around 45 off road, to soak up the rocks and roots better.
2007-07-11 17:34:50 · answer #1 · answered by ashypoo 5 · 1⤊ 0⤋
Recommended tyre pressures normally air on the safe side so you could possibly over inflate your tyre without damaging it or the rim. However the ride would be firmer than your used to. As already mentioned you might blow the tyre off the rim but more seriously if your bike is equipped with rim brakes and the braking surface is a bit thin the rim will split and you'll need a new wheel! For all things technical on tyres try Sheldon Browns cycling site. http://sheldonbrown.com/tires.html
2007-07-11 11:59:10 · answer #2 · answered by Snowgoose 1 · 1⤊ 1⤋
Hopefully I can shed some light on your question, after some rather murky answers...
Usually there is a range of pressures on the sidewall...if 40 psi is the high number then keep reading...
Most tires have a "maximum" pressure, or a recommended pressure range marked on the side of the tire. These pressure ratings are established by the tire manufacturers after consultation with the legal and marketing departments.
The legal department wants the number kept conservatively low, in case the tire gets mounted on a defective or otherwise loose fitting rim. They commonly shoot for half of the real blow-off pressure.
The marketing department wants the number high, because many tire purchasers make the (unreliable) assumption that the higher the pressure rating, the better the quality of the tire.
So, since any manufacturer always wants to provide a large margin of error to prevent customer loss and lawsuits, they're going to suggest a maximum pressure lower than the true maximum...although that pressure isn't a good idea...
Honestly, if 40 psi is the higher number in the suggest pressure range, then I'd go no higher than about 5-10 psi higher (AT MOST) or simply get tires that will be stiffer/harder.
2007-07-11 15:46:42 · answer #3 · answered by Anonymous · 0⤊ 3⤋
Have you reached 40 psi? One thing I can recommend is to dispense with the usual hand pump in favour of a manual (foot) pump which will inflate car tyres. The only consequence I think of inflating too hard may be to fetch the tyre off the rim and it is unlikely to do so with sufficient force as to land you a blow.
2007-07-11 11:45:55 · answer #4 · answered by Eddie D 6 · 1⤊ 1⤋
COME ON - USE YOUR COMMON SENSE!!
What do YOU think will happen if you inflate your tyres beyond the manufacturers maximum?? eh??
If you want high pressure tyres then buy higher pressure tyres and tubes.
2007-07-11 11:48:59 · answer #5 · answered by onlyme Mr G 5 · 2⤊ 3⤋
Well, besides the chance of having the tire blow up, it will not work too good. It wont deflect on rocks or whatever, just bounce and not provide good control, and really won't be faster.
2007-07-11 15:23:09 · answer #6 · answered by Roberto 7 · 2⤊ 1⤋
You will hear a loud ringing noise in your ears for about 5 minutes after the tube pops. Enjoy!
2007-07-11 11:46:34 · answer #7 · answered by DCG 2 · 0⤊ 3⤋
Overdo the psi and you could get a blow out
2007-07-11 11:42:07 · answer #8 · answered by Anonymous · 2⤊ 1⤋
They will just blow out if you hit anything hard in the road. Then you'll have to buy more.
2007-07-11 11:54:33 · answer #9 · answered by ? 5 · 2⤊ 2⤋
when you pump you wheels up make sure you do it outside NOT IN THE A/C.....i did it today and got i blow out....lucky i was stoping...think about it if i were sprinting.....
2007-07-11 13:57:16 · answer #10 · answered by muchi_mac003 2 · 3⤊ 1⤋