Tyre Pressures

what pressure should i be pumping my tryes up to to achieve the best performance?

There was a post somewhere about this stick 36/7 in the fronts and 35 in the rears..

depending what size wheels !, i had aftermarket 18" and was running 38-39 all round to keep even tread wear!..

Lots of threads on this (fairly) hot topic for the Stilo.

A greater footprint (lower pressure) will give you better grip and also a softer ride.

Higher pressure will always return better mpg. It will also tend to reduce uneven tyre wear and tyre wear in general but does generate a harsher ride.

For performance considerations it's important to remember that tyre pressure is very tyre dependent and excessive pressure can degrade grip quite significantly (excessively under-inflated can be just as bad of course - although this tends to degrade the handling of the car rather than any actual reduction in grip)

this will sound stupid but that PSI right?

....maybe I should up mine then, been running at 34psi all round on 225/40/18's

I think it was decks that brought this info into the forum from the french fiatforum..he brings lots of info over from that one for us here..so yes I believe it to be correct..

2.3bar 17s all round as the book says,no probs with tyer wear.i do have aftermarket rims on tho much lighter

When I had the claws and Ultrac's fitted the garage filled them to 32psi and ive not noticed any performance/consumption issues!

Mine:
215 45 R17
35 front / 33 rear.
Seems ok...
What do you experts think?

I'd say yours are spot on and Coyotes is just a spot on the low side

Having tyres at 37psi is very green but personally I'd feel a bid insecure generating a bit of 'g' on the curves

Just depends how you drive really and how you value good mpg.

Handbook gives 2.1 bar (30.5 PSI) normal & 2.3 Bar (33.5 PSI) fully laden for 205/55VR16's. Have found that 32 PSI (2.2 bar) - 33 PSI is good in terms of comfort / fuel economy / tyre wear on the JTD... bearing in mind that the wheels are 16vt Coupe Alloys

Yes; I tend to use the fully laden figure of 33/34psi on my 205/55/16's most of the time

Bit of a harsh ride on the P7's mind you. Have been thinking of lowering the psi a bit but price if diesel puts me off

36/7 sounds a little high.

I have my standard steel wheels (195/65/15) at 33 front and 31 rear. The handbook says 29/30 all round but thats a little too low imo.

I may try putting a little more air in, to see if it evens out my front tyre wear.

To a degree, but once you get too low pressure, the sidewall will take most of the weight and the centre wont be taking much weight at all. So again there will be less of a footprint, as the centre of the tyre wont be pushed down onto the road as much.

in the hand book the 215/40/18's are 37 front and 34 rear

no problems with handling