RX-Nut

Hey guys,

I just got my set of 245/40-18 and am curious what is the proper psi to use? The discount tire I went to filled it to 30psi. But they seem sorta flat.. where do you go to find out the correct inflation? How do you get this info for ANY tire for that matter??

All I know is what are the recommended specs for the stock RE040 tires since it's ON the car lol...

ken-x8

It should be the same as the stock tires. Tire pressures are generally set according to the car maker's recommendations.

I believe the owner's manual says that snow tires should be a little hgher than the standard 32 psi. I don't know whether that applies to all-seasons.

You should usually not trust a tire vendor to set the right pressure. The discount place you went to set yours 2 psi (or more, if the snow rule applies) too low. A common problem is that they'll inflate the tires to 40 psi or so to seat the bead, but never bleed it back down to the right pressure.

Ken

RX-Nut

awesome.. thanks! So regardless of tire size and brand, model, the key is to follow the actual car's recommendation?

Sweet, thx for the info.

ken-x8

Right. Unless the tire maker or a truly knowledgable vendor gives specific information otherwise. (If you've got tires sized much different from OEM, you need to be dealing with a knowledgable vendor.)

And don't listen to anyone who says that the maximum psi listed on the sidewall is the right pressure.

Ken