is there any reason for this or are did they make a mistake??? stock 17inch rims with cooper zeon sport a/s tires 235/45ZR17

the psi has been at 42 for about a month until i checked it today. the ride did not seem harsh compared to my old tires. what will over inflating the tires do?

 

anytime a tire service or someone else has put air in my tires like at an oil change...i make sure and set to correct pressure...and thats exactly what i recommend to you....

over inflated tires will wear out quicker, and provide a harsher ride...now just a few pounds wont hurt, but in your case, 10 pounds is a lot...

 

10lbs is over doing it, it is only 4 or 5 lbs over, because you don't know if his 42psi was cold or already driven on

I drive my tires hard, 35psi all around

 

if you hit a big enough pot hole, you will see. It will have the same effect as blowing the balloon to its max, and then hitting it with force....pop...Plus that 42 psi goes up 1 psi per every 10mph (highway speeds)

For TLS 35psi in the front and 32 psi in the back is recommended by Acura.
(32/32 for TL-P)

On low profiles, I usually run 5psi below the max, so if max is 44, ill run them at 39psi.

Your tires are the only thing keeping you on the road, take care of them

 

should of mentioned 42 was on a cold tire. i set them back down to 32 but i have not driven on the highway yet to see if i can feel a difference in the ride.

does a few pounds more then the recommended pressure of any benefit? grip the road better etc?

 

should of mentioned 42 was on a cold tire. i set them back down to 32 but i have not driven on the highway yet to see if i can feel a difference in the ride.

does a few pounds more then the recommended pressure offer any benefit? grip the road better etc?

 

I've done many corners... emptying and filling, the mismatch method 32 in rear 35 in the front felt loose... 34-36 all around felt about the best it could

 

A little more air = stiffer (less flex) tire sidewall when cornering and better steering feel. MPG may go up a little, and the car will feel more responsive, sharper and less mushy. If the tires/suspension are in good shape, the tires may also wear more evenly, and less on the shoulders.

Anything up to 40psi measured cold is OK; feel free to experiment between 32 and 40 psi to see if the higher pressure feels OK for you. Mine are at 36F/33R right now on stock 17" wheels; they are sometimes set for 37F/34R.

 

lower tire pressure = more contact patch = better grip...usually when you go to the race track, you lower your tire pressure....this is not opinion...

 

^ that only works with drag radials, on stock michellin's lol ftl

 

As stillhere153 says, that may be correct for drag cars, but not road racers or autocross, where handling in turns requires firm sidewalls and tire pressures are increased to 40+ psi.

Low tire pressure will cause wear on the shoulders from tire rollover, excessive heat buildup and possible tire failure (blistering, etc.) from heat on every type of car besides dragstrip cars.