Sidewall Height on Front tires
 

Hello all,

I am running Base 18" wheels.
- OEM Front spec: 245/45/18
- OEM Rear spec: 275/40/18

Question
Any thoughts on running a smaller sidewall on the front?
- I.E. 245/40/18
...if I keep the rear size: 275/40/18

Details
This is without TPMS.
These will be track tires.
I am leaning towards Nitto NT-05

Why do you want to run a smaller sidewall on the front?

It will lower your front by about an inch.

245/40 = 25.7 inch tire height
245/45 = 26.7 inch tire height

...Nitto doesn't make the 245/40/18.

I cannot find a decent track tire in 245/45/18.

Trying to find something less expensive than Michelin PSS.

Can you get 275/35/18? That would keep you level front to back while lowering it overall about an inch.

did you look at RE-11's?

cheaper than PSSs and seem to have better grip so far for me.

i changed from PSSs to RE-11s and love them.

as for your sidewall issue most people have beat me to it.

if you take the size difference from F to R out of a certain percentage then the traction control light will stay on constantly as well.

my F/R are 265/35/19 - 305/30/19 and they are bang on identical overall diameters. 26.3" i believe.

Here's the tire size calculator

Tire size calculator

youll want to compare load rating... and why nitto's. :icon08:

Nobody makes a decent tire with the two sizes listed below, besides PSS, and those are too much for a Track Tire.

- OEM Front spec: 245/45/18
- OEM Rear spec: 275/40/18

i thought OEM Z base wheels (the 18s) came with 225/245 setup?

i know sport packages OEM Rays have 245/40/19 and 275/35/19 tires

Run the 245/40/18 and 275/35/18. Problem solved.

Is 1/2 inch less sidewall something to be considerate of when tracking ur car?
- These are track tires btw...

Only if you are on coilovers and already sitting low then the lower tire height would become more of a concern.

I run 35 profile tires on all 4 corners.

shorter sidewall = better tire performance, everything else being equal

The shorter sidewall helps combat the tires squirming when under cornering loads.

i had always run my tires at OEM or damn-near spec.

Never run a shorter sidewall than stock... learning process here. :tup:

So, my track tyres are 265/35R18 on 9.5" wide wheels all round (square setup), +22 in front and +12 on rear. I could go +12 on front and +0 on rear but would need to roll inner fender lips.

My DD wheels are 8.5 front an 9.5 rear and I now run 245/45R18 fronts and 275/40R18 rears to get the gearing with the 4.08:1 diff gears I now run as close to OEM as I can.

Before the diff gears were changed, I ran 245/40R18 front and 275/35R18 rear as DD tyres.

What you cannot do is use tyres with OD more than 4-5mm diameter difference as that will confused the stability control.

thats not even an answer..

like 2 geezers talking...

man that samich was good, how was yours? :yum:

yep agree, psi should read 35 cold.


:ugh:

Nope. It will only lower the ride height by 1/2".