Tyre Pressure?

[jake33]

yeah.. well runnning 40 all round. 19s 245front 275rear

seems to be the go for me

[8110]

Just changed tyres yesterday. What tyre pressure should I be running?

FRONT - 225/40/18

REAR - 255/35/18

Currently on 36psi all round? Should I be running it lower???

HELP!!

[BaysideBlue]

Just changed tyres yesterday. What tyre pressure should I be running?

FRONT - 225/40/18

REAR - 255/35/18

Currently on 36psi all round? Should I be running it lower???

HELP!!

I would go 36psi front and 34psi rear for 18s. but even 34 and 32 psi should be fine and will give you more traction.

[Modena]

38 PSI on all wheels. I find it easier to cruise on the freeway (save petrol).

[4drftn]

what PSI for a 225/35 R20 and 245/35 R20

iv been putting 32 all round is that a bit low for a 35 series tyre...

[Taleb Tyres]

what PSI for a 225/35 R20 and 245/35 R20

iv been putting 32 all round is that a bit low for a 35 series tyre...

a bit low, 36-40

just remember these are cold pressures. ie dont check your tyres after a long drive and wonder why the pressure is so high and then deflate them! you'd be amazed how often people forget this little fact.

[NRV155]

I use 32 front and 30 rear.

I had 20's on my MR2 and used 40psi all around.

Edited December 21, 2007 by NRV155

[Victory]

I am running Toyo 245/40/18 on an R33 GTS-T with 38 psi cold all round.

Tread wear is good but it tends to be wearing the edges more than the centre on the fronts and the opposite on the rears to even them up.

[r33cruiser]

if u have no idea on 225/40/16, a save level is 35 all around.

[HotPlates]

The factory tyre pressure info for the standard 16's on an R33 is located on the inside of the drivers door for anyone wanting to know. I usually do 32 all round. Some cars require a couple extra psi in the front to compensate for the front being heavier than the rear. But always cross reference your car manufacturer and tyre manufacturers recommendations. The higher the psi above manufacturers recommendations the less tread you will have in contact with the road. For example, 36+ psi on a wet day for 16's is way too high and will cause your car to lose traction easier. This is because the centre of the tyres tread baloons out, therefore giving you less surface traction. This is also why people at the drags deflate their tyres so they have more rubber in contact with the surface for better traction and less wheel spin.

So, more psi is better for fuel economy, but worse for traction. The opposite applies aswell. If you have non standard factory tyres then check for recommendations on the side wall or ring where you got them from.