tires?
Racer
Joined: Jun 2004
Posts: 433
Likes: 0
From: Brookfield WI
No expert but...
I'm no expert but I would think that it could be potentially unsafe to run different types of tires on a car that was not used for special applications (e.g, drag racing). I'm thinking about the guys years ago who used to run snow tires in the back (because of RWD) and normal tires in front and end-up sliding into something because the front tires did not grab. Maybe not the best analogy but I personally could see problems in certain conditions (say wet streets) where the run flats might tend to slip and some nicer tires in the rear would just keep gripping.
Just my $0.02
Just my $0.02
Le Mans Master
Joined: Mar 2002
Posts: 8,466
Likes: 51
St. Jude Donor '17
i think if i remember correctly from old posts it is looked down upon.
THe front sidewalls will be stiffer and the back will flex more and could possibly cause you to loose control on hard cornering.
If you go with new tires i would suggest 295 rear and 275 front. It makes the car handle soooo much better.
THe front sidewalls will be stiffer and the back will flex more and could possibly cause you to loose control on hard cornering.
If you go with new tires i would suggest 295 rear and 275 front. It makes the car handle soooo much better.
Race Director
Joined: May 2001
Posts: 15,324
Likes: 2,079
From: Guelph, Ontario
I bought my car used and it came with run flats out back but non run flats up front. I notice that the run flats get hotter, as their pressure ends up being 2psi higher on the highway. All four tires start out at the same psi on the DIC, but on the highway after a long drive the fronts end up at 35 while the backs end up at 37. So that runflat technology comes at the price of hotter tire temps.
Racer
Joined: Jun 2004
Posts: 319
Likes: 40
From: Hemet CA
Originally Posted by Old One
Really, really, really bad idea!
Asking for trouble...
You won't be happy with handling or ride. May be OK for putting slicks on at the drags, but first high speed turn you hit, get a good grip and hang on! 
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
Race Director
Joined: May 2001
Posts: 15,324
Likes: 2,079
From: Guelph, Ontario
Originally Posted by Old One
Really, really, really bad idea!
I've owned many high performance cars, and many times have run totally different tires on the back compared to the front. I even owned one car where I ran bias plies on the back (cheater DOT "slick type" tires) and skinny radials up front, and never had a problem. I knew where it's limits were, and respected them.
So I seriously doubt anyone on here will have a problem running non run flats on one end and run flats on the other. Just know your cars limits and don't go beyond them and you'll be fine.
Look at it another way, these cars come with 245s up front and 275s out back, so that alone will create slightly different handling characteristics too, but it obviously still works well.