In Reply to: Racing tire fitment--no street tire need apply posted by tlane on June 05, 2000 at 05:54:27:
: I have 15x7 et30, 16x7 et17 and 17x7.5 et43 + 5mm spacer, but I think I'll have to buy another wheel set to meet my needs. I want to run a 17x8.5 or wider with 245/40 Hoosier A3S03's (or some other autox compound), has anyone done this?
: Note: racing tires are 10-15mm wider than street tires of the same size. (i.e., 225/45/16x7 Hoosier R3SO3 are 13mm wider than 235/40/17x7.5 Pilot SX)
Depends. What class are you running in?
I would imagine a big heavy 16 or 17 inch rim is going to actually slow you down. You are changing the rear end ratio by using those huge wide and slightly taller tires.
I run 225/50/15's on my stock rims and that works great. I'm currently using Kumhos but Hoosiers should be faster and will wear quicker as well. A light 15 wheel like a Kosei racing or something like that would be a good start. I believe Hoosiers are available in 225/45/15 and that should improve performance.
Now if you have a 2.5 or are turbocharged or supercharged then I'd say go for it, upgrade to 16 or 17" tires for competition. But I bet if your running the above engine upgrades, you're in a class where you're not going to be competitive. Always seems to work out that way.