Ozzy

Can I put F: 245/35/20 R: 275/30/20 on my IS250 AWD? Will I encounter and problems?

trinityhk

iTrader: (1)

ur gonna rub with the 245/35's.....big time.

Lama

Trinity is correct, the 245's will chew holes thru your fender liners real quick, if not rub themselves to death on metal.

Your AWD can run any tire width, as well as rim offset, that you wish.

You need to select a brand of tire, go to the manufacturers website, and find the tire chart for that brand.

Pay careful attention to the OD measurement of each size. (Outer Diameter)

You need to buy a front and rear tire that has exactly (within maybe .2) the same OD, front and rear.

For example: Falken FK452 235/35-19 and 275/30-19 have almost exactly the same OD.

This is what you need to shoot for.

Be careful you install these tires on the recommended wheel sizes listed by the manufacturer of the tire. Those will be on the sizing chart as well.

trinityhk

iTrader: (1)

I would actually suggest 235/30's in the front instead of 235/35's