tire psi

[Chimmy76]

what psi is everyone running? i have 36 psi in all of mine,the factory 35 psi seems too low on the 20" wheels it rides slightly on the sidewalls. i am used to truck tires. does anyone run anything higher?

 

[boss377]

One PSI shouldn't make any difference, but whatever the manufacturer reccommends is what you should maintain for your safety and long tread life.

 

[peterk9]

what psi is everyone running? i have 36 psi in all of mine,the factory 35 psi seems too low on the 20" wheels it rides slightly on the sidewalls. i am used to truck tires. does anyone run anything higher?

I have the 20" tires and run them at 35 psi.

 

[Spengracin]

Currently running 35 psi, but me been around race cars for a long time, Ive learned a little from tire manufactures/rubber/compounds. Taking tire temps after some long highway drives, and a day of city driving, I,ll post my results.

 

[tmilicia]

I'm running 46 psi in my 20" tires. It gives it a little bit rougher ride, but the suggested psi of 35 is just too low for towing my camper.

 

[Sgt1411]

Im running 40PSI.

Not too hard of a ride, not a big change to the driving dynamics of the Ex.

Remember the suspension engineers set up the suspension based on their recommended PSI, which can be different then the tire manufacturer.

So if you change the PSI you can change the driving dynamics.

 

[esandye]

Im running 40PSI.

Not too hard of a ride, not a big change to the driving dynamics of the Ex.

Remember the suspension engineers set up the suspension based on their recommended PSI, which can be different then the tire manufacturer.

So if you change the PSI you can change the driving dynamics.

So what is the max inflation pressure of the Hankook 20 inchers?

 

[Car 54]

Probably should be restated that the manufacturer suggests 35 psi cold. This truly means not driven for many hours, and no direct sunlight on the tires.

Here's my issue and I'm not sure if this is standard but my valve stems claim that my tires are nitrogen filled. Now I should expect almost no rise in psi with temp, but engineers depend on that rise, and that is why they say cold.

I had 34psi of nitrogen, I added 3 psi of compressed air.

Don't look at your sidewalls, that's tire construction and no indicator of tire pressure.

Taking tire temps is difficult to do. You must use a probe and you must drive your car and immediately take the temperature. You cannot drive around, then come home, then take the temperatures. I sure hope there's no real inner/mid/outer differences during normal driving...tire really shouldn't be much above 100°. On a race track where you see 200°+ tire temps you tend to get a bigger delta%. Highway....hope there's not a big difference.

What kind of racing Speng?

 

[tmilicia]

So what is the max inflation pressure of the Hankook 20 inchers?

51 psi

 

[Bill #5 Explorer]

I like 34 PSI. 1 below OEM.

 

[Spengracin]

Car54: let's see soap box, gokarts, scca a production, score pro truck, nascar craftsman truck, NASCAR West Series, last cup start 2009. Been around a day or two, yes, have a probe or two laying around the race shop. Yes you can take temp averages, mostly to determine proper inflation, should be within a pound or two across the tire, hotter on the edges will show under inflation, hotter in center over inflation.
The tire will not read like race tires, but it does give you delta averages across the tread. Your right do not look at the side wall at all, but visually you can tell a lot about how the crown of the tire is meeting the road.

Here's my reading after 87 miles of all freeway, I'm 1/4 from the freeway to my garage, so the heat will dissipate a bit, you'll be surprised by the temps; set pressure; 36 psi

O. M. I.
124 123 124 (LF). 123 123 124 (RF)

119 118 119 (LR). 118 118 118 (RR)

Next step check the weight ratio, for distribution ( stock), will try 1 pound increase, see now this helps the tire foot print, the slight variables are compound differences. I don't think I have enough mileage to test for better fuel economy. My F150 with this same baseline, and adjustment for each set of tires, I was able to get 65k out of 50k warranty tires.

Temps on race tires above 200 really means you are way loose on the rear, which is fast, tires won't last long though.

Remember 2nd place is the first loser, if you not first, your last. Lol

PS

 

[Car 54]

Alright Ricky Bobby...

Thanks for taking the measurements. Did you happen to check tire pressure during your temp checks? Do you have one of those fancy computers that tells you what cold start temps should be? I'm thinking something like 37F/35R. I assume your goal would be to get the fronts down to the rears.

I have no round and round experience, my experiences are based on road course events.