Hi guys,
Newbie here, I have read other posts still dont have the peace of mind so making this thread, sorry if a repeat.

I have a 2012 G7 X (Non-sport, just the X) and tire size is 225/50 R18 and from other posts & online research OE wheel size is 18"-7.5" 43+ offset (please correct me if I am wrong) and what brand/type of tires should I get, I live in Virginia, USA and during winter its freezing temperature. I was suggested the Indy500 tires by a Q50 owner.

(also my friend works at honda so I can order my tires on cash prices and get $20 cheaper than retail)
I want to know whats the widest tire i can fit on my OE wheels without having any issues. I am a aggressive daily driver and have a heavy foot.

Please help me out here.
Thank you

 

235 is the biggest you can go. If you want the best, you run a Summer/Winter setup, and switch your wheels as soon as the temperature comes down to whatever the mfg. says is dangerous.
I'm biased to Michelin. I run either Michelin Pilot Super Sport or Pilot Sport 4 S in the summer. 500 treadware cause I don't fancy spending $1000 per year on tires. Never needed more grip on the regular roads.

Blizzaks in the snowy Boston winters.
In VA, just get anything that is sticky in the cold, you don't get real snow outside Appalachia, and the whole state shuts down anyway.

For a compromise go with All seasons. Top end is the Michelin Pilot A/S 3+... X-tour, or M4VX are fine too.
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I spoke to a friend today and he was like 245 is the MAX I could go without any issues and suggested 245/45 R18 or 245/50 R18.......will these work ?

 

I wouldn't. You got a lead foot and love the turns? Would suck to pop a bead and total your car. Buy new rims if you want the width.
I'd also stick at a 50 profile, the 45 will change your speedometer accuracy and possibly screw with the AWD ( use a calculator to determine the difference in size. +/- 3% makes the AWD freak out). Also with the 50, you get better protection from potholes and better traction. Also looks better IMO, since there's ungodly wheel gap on the sedan with stock springs.

FWIW, I had 235 PSS last year, and 225 PS4S this year. No significant differences in grip, on or off the track.