air pressure
 

I've got some 215/45 r17 tyres and wanted to know if Im running the right psi and what you guys run?

ive got it on 32front and 34back

Check inside your drivers door. Pretty sure for that size its 32 front 29 rear

using the Perth-WRX mobile app

Not sure on official answer, but I have the same size tyre and run 39 front 37 rear. Anything less and you may get premature tyre wear.

The front tyres should be inflated an extra 1-2 psi more than rears to my understanding.

Run 40 in both, what I got told or else you'll get sag and wear

35psi front and rear

Recommended front 33.5 rear 27.5. Im running front 35 rear 31 cold

using the Perth-WRX mobile app

I run 36/34 (f/r) on 225/18/40

People who are running more than 34 ... are you setting your pressures hot or cold?

Mostly done late at night, so... cold?
How much are they going to expand in the heat/when warmed up?

When I got my tyres put on, John said they'd take 38/40 just fine and to just watch my tyre wear and adjust accordingly if I encounter any noticeable wearing at the edges or across the middle section of the tyre.

40 PSI F&R, usually cold. I do the same for cars at work with tyres 45 profile or below.

Going on 50k kms and they're still evenly worn with about 40-50% tread remaining.