leisinjp

Hey CL,
I did a Google search and a ClubLexus search and couldn't find the answers I was looking for. One thread had to do with PSI in 20 inch tires but I'm looking for more specific to what sizes I have.

Summer - Fronts 255/35/19 Rear 285/30/19
Winter - Front & Rear 225/45/18

The door jamb says 36 PSI from what I recall or something close to that. I'm no mechanic or engineer but to me I feel like the PSI would need to be different for a 225/45/18 tire than a 285/30/19 tire?

With that said, what do you all do? Especially if you run a summer and winter set of wheels like I do. The stock rims and tires never are on the car so I want to make sure I'm not hurting the performance of the car or the MPG with the wrong PSI.

Thanks!

MileHIFcar

I run summer tires year round and run 37 psi cold on 275/30/19 & 245/35/19 MPSS....seems to do fine with that psi

leisinjp

Do you think 37 in both sets of wheels is good?

flowrider

iTrader: (9)

I run 38 PSI.

Lou

leisinjp

Do you run 38 in both your summer and winter wheel setup?

flowrider

iTrader: (9)

^^^^I'm in Arizona and don't need winter tires If I did, I'd probably run them at 36PSI, since I would expect less performance out of them. But, also, I am lucky enough to own more than one vehicle, and if I lived in winter, I would probably put the F in hibernation for the cold months,

Lou

j3ff

From what I've read, I just go with whatever is on the door placard. I believe the psi is mostly vehicle weight dependent and not so much about tire size; maybe tire type could be considered. And this is all for daily driving..obviously if you're at the strip you could lower psi temporarily and such.

MileHIFcar

Depending on the temperature in winter time for the winter set-up I would run a few psi less like maybe 34-35 psi cold in winter then a little bit higher in summer like what Lou said above.

I do have another vehicle to drive in the winter, but when the roads are dry I don't hesitate on taking out the F in 35-40 degree weather, I'm just a little bit more careful as I don't have the grip like I do when it's above 45 degrees F

leisinjp

I appreciate the info and help guys! I will set them at 36 and see how it feels and drives and adjust from there. I'm thinking for the summer wheels I will start at 37 or 38 PSI and experiment with them.
Thanks!
Jordan