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I'm currently running 205 Victoracers on my 15x7 Kosei K1's for autocrossing. The guy that won street mod in Steel Cities and codrove 1 event with me last year in my Mini insists I can/should be running 225's on these wheels.
I'm not running those (I'm in G stock) but I would have to agree. Wider is better for autocrossing. Don't worry about the gearing change from a taller tire, it's just not an issue compared with more grip. At nationals you mainly see super light wheels like SSR's, taking advantage of the +/- quarter inch off-set rule, with the widest tire that can be squeezed onto the rim. We ran a 225/45/15 on a 6" wide wheel. You have to cut them off when they're spent.
A guy in our region is running 225/50/15's in STX, but on after market wheels, so the offset may be slightly different. His doesn't rub on course, I'm not sure about street driving.
I'm currently running 205 Victoracers on my 15x7 Kosei K1's for autocrossing. The guy that won street mod in Steel Cities and codrove 1 event with me last year in my Mini insists I can/should be running 225's on these wheels.
Anybody run this setup? Thoughts?
Thanks,
Gene
Gene,
With 15x7" rims you'll want to use the widest tire size that fits available for that tire. Some tires only come in 205/50-15 and that will do. While other tires come in your choice if sizes including 225/45-15 (better choice).
225/45-15 will fit nicely with 15x7" rims and there should be no rubbing issues when wheel offset is about +37mm to +45mm. You should expect the tires to look quite wide and extend out beyond the wheel wells. This also means that the wider stance will sneak you up closer to the cones and maybe shake a few so make some adjustment to your line.
You will gain about 3 pounds on each tire moving from 205/50 to 225/45.
This is OK since you gain in grip.
__________________
#43 Street Modified (SM) Class SCCA Hawaii Region
2005-2009 Solo Run Off and Points Champion (Hawaii)(2nd 2006 Points)
2005-2008 Overall PAX: 8th 2006, 7th 2007, Tied 10th 2008.
2010-2011 Modified FWD RallyCross (Points Champion) http://www.sccahawaii.org/pics2008/s.../img_38944.jpg
My 205's are about 1/2 used up. I've got Evo I and II in May (can't wait). Since they estimate 30 runs per day I'll probably order 225's shortly after.
Will 225/55s work ok. Unfortunately, the Victoracers do not come in 225/45 - only 205/50 and 225/55. I have V700s in 225/45 now, but was considering changing to Victos.
Any thoughts?
Quote:
Originally Posted by minihune
Gene,
With 15x7" rims you'll want to use the widest tire size that fits available for that tire. Some tires only come in 205/50-15 and that will do. While other tires come in your choice if sizes including 225/45-15 (better choice).
225/45-15 will fit nicely with 15x7" rims and there should be no rubbing issues when wheel offset is about +37mm to +45mm. You should expect the tires to look quite wide and extend out beyond the wheel wells. This also means that the wider stance will sneak you up closer to the cones and maybe shake a few so make some adjustment to your line.
You will gain about 3 pounds on each tire moving from 205/50 to 225/45.
This is OK since you gain in grip.
You have to cut them off when they're spent. 
His doesn't rub on course, I'm not sure about street driving.
