Plus size 17" rear tires?

[ReallyDirtyThirty]

I guess the first question would be why?

Because racecar...

[DenverSteve]

If you're worried about inner rubbing, use spacers.

[jmatta]

I have 10" rears et47 with 265/35/18 (no spacer) and needed to tie back the e-brake cable to avoid rubbing. I can mount a 285 on the wheel, but would likely need a spacer to clear the inside strut, so to answer your question; yes, it would rub on the inside.

To the original question; I suppose you have 255/40s presently? Mounting a 265/40 is going to create a taller tire and if you mount a 265/35 on a 17" rim, you will have a shorter tire.

Stick with OEM sizing...

[thstone]

On my stock 17" wheels, I run wider in the fronts (225/45/17 vs stock 205/50/17) in order to reduce understeer and improve initial cornering bite. The wider size/lower aspect ratio also keeps the tire diameter constant.

Keeping the overall tire diameter constant is important because the four-wheel ABS system relies on wheel speed sensors and if the tire diameter changes then the actual wheel speed can be either lower or higher than expected by the ECU and the ABS calculations will be off which may affect proper ABS operation.

In the rears, I run the stock size because increasing the rear width would add understeer and there is no reasonable width increase (265 or 275) that can be combined with a correspding change in aspect ratio to keep the tire diameter nearly constant (265/40 and 275/40 are too tall and 265/35 and 275/35 are too short).

The 285/35/17 is the right answer in terms of matching the stock tire diameter but going 30mm (1.2") wider on the stock 8.5" rear wheel is too much of an increase. Of course, you could just do it (we've all seen worse!) but as Topless said, you really need to go to a larger wheel (9.5") to properly mount a 285.