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I am looking for some help on what size tires to purchase (to go on Z06 wheels). The tire rack is telling me that 305-30-18 for the rears and either 255-40-17 or 275-40-17 for the Ft. Any suggestions or reccomendations?
Also how about tire pressures for the Victoracers?
I don't think Victoracers are gonna help you since they don't come in 18". The Kumho Ecsta V700s would work but I've heard better reviews of the Toyo RA-1s and would check those out first if I were you. I'd be trying them myself but they don't come in my size (315x17). When I used to run Victoracer 275s & 315s I used hot pressures of 36fr 34rr. A search and/or post on the Autocross/Roadrace board would probably yield lots of helpful info. Good luck.
Fair warning about those 305's .. they are a few inches shorter than the stock coupe w/sock size runflats. If you have an auto you'll most likely want to change the settins (no I don't know how) as it will through your speedo off, and unles you go with equally smaller-ish sizes up front you'll possibly confuse your abs/ah computer resulting in DIC messages about it.
I run the 305s in autocross ... on all fours.
Given that I had the cruise set at 55 and was beign followed by a sherriff when a pickup flew by us both and the cop did nothing, I figure my MN6 speedo was a bit off.
But damn they stick to the road err I mean parking lot surface.