Reply With QuoteHi,
I've found tyre pressure makes a big difference to ride quality but you have to be careful when you change brands/types.
I switched my OEM Wranglers over to Scorpion ATRs and got them at the usual tyre shop 'recommended' rock hard, over 40PSI setting. I found them harsh and a little skittish in the wet (although I've been told increased pressure in the wet actually helps with traction....that may depend on just how much of an increase). I dropped to the placard 33 + 36, with a much improved ride.
Problem with this didn't become apparent for a little while though. I have effectively reduced the life of my Scorpions as they all wore (all 4) on the outside edges quicker than the inside. Which is indicative of pressures being too low.
I had to pick the best of the worst for the back and spare, buy one new one and employ the spare tyre (never used), so that I had two good tyres on the front. I'm now operating just below 40PSI in the front and above in the rear (so that I get some more use of the middle, where the tread is still good).
I'll have to monitor wear much more closely now.
You'd hope manufacturers would be able to supply the correct data...but I guess there are lots of variables...weight of vehicle, usage, power, etc.
I face the same dilemma with the new 18" Zeon LTZs I just bought as I don't know what pressure to run those on the road at....came from tyre place at 42PSI.
Anyway, as other have suggested, play with the pressures until you get a good ride. If the corresponding pressures are at placard or above, it was your tyres. If not (as in the pressure is lower), I'd be taking the car back.
And as I've learned the hard way...watch wear carefully.....it's a bloody expensive mistake on 19" tyres.
Cheers,
Kev.
Originally Posted by pwillo
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