Over inflating a tire causes it to micro bounce. Beat up the suspension and lose contact with the road. You could probably go over by one or two PSI but when you start doing that crazy nonsense 45 psi junk that people think is right. You wind up with the car that is all over the road and for what? Suspension is taking a beating where the tires should be doing that for you
We keep our Prime XSE in Mexico ... not the best roads but not that different than Tucson either. Dropped pressures to 30 front and 29 rear just to try and smooth things up a bit, rather take the hit on the MPG's than replace bushings (our last three Prius all wore through the suspension bushings before anything else gave out) so will walk that fine line between too low of pressure and damaged 19" wheels vs too high of a pressure with damaged bushings. Would love to find some tires with larger side walls ... maybe swap out for 17" wheels and larger sidewalls - we will see.
Not sure if you just mean for the Prius or in general but in general over inflating does make a big difference in efficiency. It reduces rolling resistance. BUT, BUT it can be at the cost of grip or cornering control.
Mine starts complaining about low pressure at anything under 34. They end up around 37 because my pump's gauge is kinda garbage.
I raise the tire pressure above my nominal setting by 10% and then reset the TPMS. Then I lower the PSI back to my nominal settings. This makes the TPMS alarm sooner than it's typical 20% PSI loss. JeffD
Curious if there are any updates or changes in thoughts regarding tire pressure now that these cars have been in the road for a couple of years. I don’t want to wear out suspension components early by putting PSI at 40 but I’m just as concerned about tire wear as I am about pinch flats. Maybe I should aim for something in between? Upon delivery tires had multiple PSI range of 37-39.
I suspect not; Daisy’s poised on the event horizon, of the black hole of 5th gen acquisition, eternally.
Yes! You noticed. Ha! I will definitely make a new thread. I received it last night. Things went smoothly. Trying to let go of the fact that someone put several scratches on the plastic along inside of door after I test drove it. There were additional 13 miles on it after I test drove it. This dealership is really strict about not letting people drive sold cars. I’m not worried about the miles just wish I could have berm tge inevt it except wishing I had th chance to put the fire scratches. Ha! Big reveal coming soon!
