I just finished installing the 185/65/15 Bridgestone Blizzak WS70's with black steel wheels on my 2009 Prius. I ordered the entire setup from TireRack.com. It showed up at my front door three days later mounted and balanced for a very reasonable $690 shipped (I opted not to get the $220 TPMS sensors installed). I did notice that they weighed a pound or two more than the stock wheels/tires, but they went on just fine. However, I snapped a wheel stud on the rear drivers side while removing the stock lug nuts. I'm guessing at some point before I bought the car, it had the lug nuts over-torqued by one of the mechanics, which can actually stretch and weaken the studs. Replacing the stud (from what I've read online) seems pretty simple. I might give it a shot myself if it would just warm up to above freezing already (WI winters...I tell ya)!