Here's my setup:
18x8.5 TR Motorsports MT1
225/50/18 Bridgestone Blizzak LM-60
25mm Spacer in the Rear
No TPMS
Total wheel/tire weight: 48lbs
Lowered yet no problems.
Having had this setup through 2 seasons now, I am very happy with the dry/wet/snow performance. I know the tires can handle up to 120+mph, and handle spirited runs in the curves as well. I'm more worried about the 225 width than the tires themselves when it comes to traction. Next set I will probably go for a 245/45/18 setup.