Re: Wheel offsets and older rims
Yeah, you're gonna need a full winter set. I live in Canada too, Niagara Peninsula where there's not much snow, but lots of ice and slippery streets. I've been checking out the possibilities while waiting for the '13 SRT8 to come along with the 8 speed trans.
You can check out Tire Rack and Direct Tire online. Tire Rack doesn't show any gear yet, but suggest you call them for fitment. Direct Tire has V-Tec offroad and G-FX OR9 rims packaged with correct sized Yokohama W.drive tires for USD 1880.00 - 2052.00....plus shipping, customs and HST. Not sure if TPMS is included or extra, but either way the top priced set should come in under $2700.00 delivered and ready to mount. That's a pretty good deal for a 20" winter set.
Tire Rack's price for a similar set and size for a Porsche Cayenne 20" set is $3164.00, Plus S&H and HST.
Buy the DVD package, turn up the volume, and the kids won't be bugged by the exhaust note! If their mother doesn't like it, you can get her earmuffs...