[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.