looking for good rubber... stock sizes or something a little wider that fits the stock wheels and doesn't throw out the speedo too much
i will pick up within 1 hr from the Greater Toronto Area

 

I have a good set of 245/40/18 in hamilton.

 

pm'd

 

nudge

 

bump

 

I live in Waterloo.
I have a set of Bridgestone Potenza RE050A that I took off my 2011 G37s sedan purchased in Aug 2011. They were on for 10,000 km and have 7/32" tread. (tread is 10/32" depth when new)
They are staggered sizes 225/50 18" & 245/45 18"

1010tires.com (Canada) they cost $1,189.96 plus shipping
Tirerack (U.S.) they cost $968.00 plus shipping and fees.

PM me if interested.

 

are you sure the fronts are 225/50 ? that would put the diameter of the tire larger than the rears
225 x .5 = 112.5
245 x .45 = 110.25

just askin

 

Yes they are 225/50 and 245/45.
It looks like you have calculated the sidewall height in millimeters.
It's the circumference that matters the most and it's a widely accepted standard that there can be up to a 3% difference in diameter.

 

I've got some 245/45/18 Goodyears. Little life left on em, $50.

Little larger than you want but they're sweet for burnouts.