Ding, ding. We have a winner. Great observation. To go to a 30 aspect ratio, IMO the tread needs to be a bit wider to look right.
Will 305/30/19....
Burning Brakes
Joined: Oct 2006
Posts: 995
Likes: 2
From: Virginia Beach VA
Check out the math:
285/35-19, 285 x .35 = 99.75mm sidewall (GYSCRF)
295/35-19, 295 x .35 = 103.25mm " (KDW2)
305/30-19, 305 x 30 = 91.5mm " (PS2)
325/30-19, 325 x 30 = 97.5mm " (GYSCRF)
IMO the more tire filling the fenderwell the better the look, unless you lower the car dramatically to fill the gap which looks good too, but comes w/ some tough sacrefices. Check out a 19/20 combo w/ low profile tires w/ the car slammed & it looks really good, but it then dwarfs the rotors along with tougher ride.
Instructor
Joined: Mar 2007
Posts: 223
Likes: 0
From: Casper WY
I went with the Nitto Invo's in 305/30/19 and the 255/35/18 in the front. The overall height compared to stock is really close. Won't affect ABS or anything and the speedo is 1.5mph at 80 I believe. The ride quality is much better than the runflats. I can't really report on the traction as it is so cold here in Wyoming and the tires were put on in November. But soon I will be able to test it out. The tires have rave reviews and are priced right so do yourself a favor and check them out!!
Team Owner
Joined: Jun 2007
Posts: 31,088
Likes: 23
St. Jude Donor '08 thru '13
My concern too on going this route, vs KDW2s 295/35-19 which is 27 tall vs 26.3 on the PS2. It's not the width that makes it look funny it's the size of the sidewall, 30 is 30% of the width of 305mm, 30% of a 325mm tire translates to more sidewall. The only thought I've had to lower the rear further than I already have, because realistically the stock tires are 26.9 -26.3 is about a 1/2" resulting in a 1/4" deficit in the fender well space to the tire, thus by lowering there rear 1/4" effectively would eliminate the visual effect.
Check out the math:
285/35-19, 285 x .35 = 99.75mm sidewall (GYSCRF)
295/35-19, 295 x .35 = 103.25mm " (KDW2)
305/30-19, 305 x 30 = 91.5mm " (PS2)
325/30-19, 325 x 30 = 97.5mm " (GYSCRF)
IMO the more tire filling the fenderwell the better the look, unless you lower the car dramatically to fill the gap which looks good too, but comes w/ some tough sacrefices. Check out a 19/20 combo w/ low profile tires w/ the car slammed & it looks really good, but it then dwarfs the rotors along with tougher ride.
Check out the math:
285/35-19, 285 x .35 = 99.75mm sidewall (GYSCRF)
295/35-19, 295 x .35 = 103.25mm " (KDW2)
305/30-19, 305 x 30 = 91.5mm " (PS2)
325/30-19, 325 x 30 = 97.5mm " (GYSCRF)
IMO the more tire filling the fenderwell the better the look, unless you lower the car dramatically to fill the gap which looks good too, but comes w/ some tough sacrefices. Check out a 19/20 combo w/ low profile tires w/ the car slammed & it looks really good, but it then dwarfs the rotors along with tougher ride.
I also thought about lowering the rear if I went with the 305, but then the stance of the car might be different, and my headlights would shine higher if the rear was lowered disproportionately (no big deal to adjust, but it did cross my mind).
I did not want a 19/20 combo, because the roads here in CO can be rough, and have RR tracks and potholes. Not enough sidewall for me.
I probably way overanalyzed the whole thing, as I tend to do, but in the end, I'm glad I did it how I did.
As more tires become available in a 325/30/19, I'll have more choices if I decide to try something other than the SCRF.
When you get your swap done, post up photos, I'd like to see them.
Burning Brakes
Joined: Oct 2006
Posts: 995
Likes: 2
From: Virginia Beach VA
Do a search, I've seen several posts w/ pics. They look very good & to be honest, after all this analysis, my head hurts, & I think I'm going to just get the KDW2s & be done w/ it!
Pro
Joined: Feb 2006
Posts: 632
Likes: 0
From: KINGS PARK NY
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Burning Brakes
Joined: Feb 2002
Posts: 1,232
Likes: 10
From: Montrose Colorado
Last edited by vettl83; Mar 5, 2008 at 11:56 AM.
Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
I agree, Mike. My speedo is dead on still, the look is like another car we've seen around (the Z06) runs that size tire, so it retains the original look, which is part of what I was after.
I also thought about lowering the rear if I went with the 305, but then the stance of the car might be different, and my headlights would shine higher if the rear was lowered disproportionately (no big deal to adjust, but it did cross my mind).
I did not want a 19/20 combo, because the roads here in CO can be rough, and have RR tracks and potholes. Not enough sidewall for me.
I probably way overanalyzed the whole thing, as I tend to do, but in the end, I'm glad I did it how I did.
As more tires become available in a 325/30/19, I'll have more choices if I decide to try something other than the SCRF.
When you get your swap done, post up photos, I'd like to see them.
I also thought about lowering the rear if I went with the 305, but then the stance of the car might be different, and my headlights would shine higher if the rear was lowered disproportionately (no big deal to adjust, but it did cross my mind).
I did not want a 19/20 combo, because the roads here in CO can be rough, and have RR tracks and potholes. Not enough sidewall for me.
I probably way overanalyzed the whole thing, as I tend to do, but in the end, I'm glad I did it how I did.
As more tires become available in a 325/30/19, I'll have more choices if I decide to try something other than the SCRF.
When you get your swap done, post up photos, I'd like to see them.
Drifting
Joined: Oct 2006
Posts: 1,732
Likes: 2
From: Naples FL
EDIT: I guess the only tire that size is goodyear. What has your experience been? I know it is bigger and should give better traction but those tires suck stock. I'll probably just go with something 305/30-19 because there are more options.
Last edited by NEV3R L8; Mar 5, 2008 at 04:59 PM.
Melting Slicks
Joined: Feb 2004
Posts: 3,307
Likes: 111
From: Tucson AZ
Michelin PS2 305/30-19 on the rear and 275/35-18
I put Michelin PS2 305/30-19 on the rear and 275/35-18 on the front. They fit the stock wheels just fine. Both front and rear stock wheels are 1/2" less than the recommended width, but that is just 1/4" on each side and you cannot visually tell the difference.
The larger front and rear tires look like they came on the car. No DIC warnings with this combination.
The first thing you will notice is the car rides much better and really sticks when you are on the throttle.
The larger front and rear tires look like they came on the car. No DIC warnings with this combination.
The first thing you will notice is the car rides much better and really sticks when you are on the throttle.
Pro
Joined: Nov 2006
Posts: 500
Likes: 0
From: Venice Florida
I put Michelin PS2 305/30-19 on the rear and 275/35-18 on the front. They fit the stock wheels just fine. Both front and rear stock wheels are 1/2" less than the recommended width, but that is just 1/4" on each side and you cannot visually tell the difference.
The larger front and rear tires look like they came on the car. No DIC warnings with this combination.
The first thing you will notice is the car rides much better and really sticks when you are on the throttle.
The larger front and rear tires look like they came on the car. No DIC warnings with this combination.
The first thing you will notice is the car rides much better and really sticks when you are on the throttle.
Pictures?
