Overinflated Tires
#1
Overinflated Tires
I let someone borrow my car and I didn't notice until weeks later that he had overinflated my tires to ~55psi on 2 of the tires, 30's and 40's on the other 2. Chalk it up to a bad gauge at whichever gas station and him not knowing about the built-in sensors visible in the dashboard.
I guess the numbers weren't a big deal because I drove a few weeks without problems and the dashboard didn't issue any warnings. But it got me wondering, what are long term effects of having overinflated tires?
This is more of a general question but mods seem to like to route all my threads here anyway lol. I guess the specific model can make some difference.
I guess the numbers weren't a big deal because I drove a few weeks without problems and the dashboard didn't issue any warnings. But it got me wondering, what are long term effects of having overinflated tires?
This is more of a general question but mods seem to like to route all my threads here anyway lol. I guess the specific model can make some difference.
#2
Ride quality issues and wearing the centre of the tyre out first are both overinflation related issues.
You sure the pressures were what you measured? That would (should) have set off a light in the dash...
You sure the pressures were what you measured? That would (should) have set off a light in the dash...
#4
Racer
I actually run my fronts at about 46psi and the rears at 35ish. I don't think the light will come on for being over-inflated, but like BROlando said, those are the issues.
Most tires I've seen aren't supposed to go over 54psi or they can blow out.
Just reduce the pressure and it'll be fine.
Most tires I've seen aren't supposed to go over 54psi or they can blow out.
Just reduce the pressure and it'll be fine.
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#8
Racer
Bolstering sidewalls and better contact with the road. I autocross frequently and just leave them at my desired specs.
Good info here if you are curious: https://www.tirerack.com/tires/tiret....jsp?techid=58
Good info here if you are curious: https://www.tirerack.com/tires/tiret....jsp?techid=58
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xtcnrice (09-20-2018)
#9
Senior Moderator
So, great for 'competition' handling, but for daily driving, probably unnecessary, you'd say?
#10
Racer
#11
Burning Brakes
Agreed. While higher pressures in the front stiffen the sidewalls and can reduce oversteer in FWD vehicles, the smaller contact patch will increase braking distances.
#13
Racer
Give it a try if you want, don't if you don't, lol.
I'm gonna keep doing what I do.
I'm gonna keep doing what I do.
#14
I only noticed when cycling through my dashboard info, never measured with a gauge. Was cold.
#15
Oh yea it's interesting stuff. I tried it inadvertently for a few weeks due to not noticing the pressures. I guess I drive too tame to have noticed a difference . Hands are tied being in a more urban environment recently.
#16
I've personally found most cars handling goes down when tires are overinflated, but I don't autocross.
#18
Racer
When you increase tire pressure you are making the tread push out. Both over-inflation and under-inflation will worsen handling.
You'll notice on the sidewall of your tire some dots below where the tread stops. These are all the way around. You want the tread to contact just at the top of these dots. The pressure I run accomplishes that. It's a front-end heavy car which is why I run so much in the front. It'll vary depending on tires too.
Edit: Could just be weather fluctuation that made them so high: https://www.tirerack.com/tires/tiret....jsp?techid=73
https://www.tirerack.com/tires/tiret...e.jsp?techid=1
You'll notice on the sidewall of your tire some dots below where the tread stops. These are all the way around. You want the tread to contact just at the top of these dots. The pressure I run accomplishes that. It's a front-end heavy car which is why I run so much in the front. It'll vary depending on tires too.
Edit: Could just be weather fluctuation that made them so high: https://www.tirerack.com/tires/tiret....jsp?techid=73
https://www.tirerack.com/tires/tiret...e.jsp?techid=1
Last edited by t3hhcaptain; 09-27-2018 at 09:23 AM.
#19
Don't feel like I have a good grip on the road, doesn't handle in turns as well, ride gets really bouncy. Nothing specific like "at 40mph into the hard left turn on the Hwy 92 uphill it slides out"
#20
Burning Brakes
Just wanted to point out that Acura and tire manufacturers specify the psi not just for handling reasons. They factor in tire wear and road noise as well. It's a balancing act. Over-inflate or under-inflate by 10% and I'd say you're still within balance (engineers always build in a margin of safety). +10% will accommodate hyper-milers and canyon carvers. -10% are for softer rides. Beyond those boundaries, however, you need to know what you are doing, i.e.: track driving and auto-crossing (hard) or driving on a beach (soft).
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