Tire pressures

Hmmm, Not considering premature of uneven wear of your tires? If they are inflated too much over or under the rating you can mess up the even tire tread wear. Under inflated tires can over heat. You know what it can cause on prolonged high speed cruising. You don't drive on highways? Under inflation can be dangerous. Too over inflated, you lose control/handling. What's wrong with WRX? I have one in the family. Kids drive Subaru, I am a Honda man. Truck is Ford.

when the factory Only gives One pressure rating for an empty or fully loaded vehicle, to me it can only be right in one situation, or an average. If 33psi is the right pressure for the front tires with 58% of the weight on them, than 30psi can't be right for tires with 42% of the weight. Fully loaded maybe.

For the streets I test drove the WRX on and even drive the 2,5i on, and Maybe because of the newness of the suspension and seat, that initially felt like the lumbar area was too stiff or protruded too much, and damaged sensitive muscles, even my 2.5i Hopped over slight irregularities in the streets, that was very uncomfortable. I am probably more sensitive than most do to an injury, but don't enjoy something that jolts me, that doesn't in other cars. All my cars have had HD suspensions, since that's what I prefer. Now after some mileage things are much more acceptable, even with slightly higher than factory recommended tire pressures.

I don't think 24psi in the unloaded rear of an Impreza wagon is too little. I run 20psi in a mid sized Chevy FWD car, though that has oversized tires in the rear, and never put more than 25 in the rears of any cars, and never had a problem with uneven tread wear, or failures.

Hi, Manual shows typical cover all situation tire pressures. Can I make a suggestion? with 20 psi pressure, go out to turn pike and cruise about couple hundred miles and see what happens. Often see all those shredded tire thread rubber pieces on the road? What do you think happened? I always raise pressure ~5% when towing. Same with hypermiling. All cars/trucks in my family has upgraded suspension. I like to drive vehicle which gives feedback from the road. I am a driver not a vehicle operator. Been at it over 50 years. Look at the tread evenness across your tires. Do they all look even?

one of the rear tires in my old car has a very slow leak from a brad in the tread, that I haven't fixed, since it is mainly driven in a city, but it has been down to 7psi after I drove it on the highway, and it still is intact. Being oversized and on the rear of a FWD car, it has to get really low before it looks low. Since I never had a tire fail or uneven wear in my 50 yrs of driving, I guess I do something right. Those oversized tires have some pretty big cracks in the sidewall on the inboard sidewalls. Good thing I only see them when I have the tires off. )) To me the outer rubber is mainly to protect the fabric from abrasion, which it isn't going to get very easily on the inner sidewall. I worry more about the smaller, recommended size front tires for the car, because of the extra weight they have to carry. The rears can probably carry double the weight they do.

Hi,

I'd suggest it's more likely Mr. Darwin just works slowly.

Rick

I agree. 7 PSI is damned close to where the bead will collapse.

too true!!!

Yea, Mr Darwin never met me. Guess it wasn't wise to not plug a puncture sealing tire after pulling a roofing nail out, a few hrs before a 420mi trip on the Interstate. It only lost 3psi in 4 hrs before the trip.

Things like wet weather traction, and tire load cap are important to me, not things that aren't a concern. My dad was Real old school, and wouldn't park in a tire that had had a flat in any water. They Used to think that a Tube Type Tire that the tube was patched, the cotton cord in the carcass would rot, from water that got in an unplugged puncture, and blow out. Didn't make any difference that tires were tubeless at the time, and you plugged the carcass.