New wheels, traction control issue
Thread Starter
4th Gear
Joined: Oct 2008
Posts: 4
Likes: 0
New wheels, traction control issue
Hey guys. I have a wheel/tire shop in Arizona. We just did 20's on a good friend of mine 07 'vette. Now he is having issues with traction control is this normal? Any help would be greatly appreciated.
Safety Car
Joined: Oct 2003
Posts: 3,644
Likes: 13
From: South of Boston MA
I'm no expert here but the '07 had 18's on the front and 19's on the rear. Did you go with 20's on all four corners? If so, that might mess up the traction control. I'll let the engineer types toss in their .02 cents. 
Race Director
Joined: Oct 1999
Posts: 13,298
Likes: 14
From: Somers NY
I don't think the actual wheel size matters, what matters is the "overall" diameter of the tire.. if the front has an 18" wheel but the over all tire hight is 26" and the rear has a 20" wheel but the tire has a shorter sidewall making it also 26" there should be no problem..
On the C6 they have 18 front and 19 rear but the overall tire diameter is the same...
On the C6 they have 18 front and 19 rear but the overall tire diameter is the same...
Pro
Joined: Aug 2004
Posts: 534
Likes: 0
From: Ann Arbor MI
Spot on to each other, or spot on to the original 18/19 setup? The tire circumfrence needs to match the original set up, or at least keep the same F/R ratio.
Did you have the TPS swapped into the new wheels?
Did you have the TPS swapped into the new wheels?
Melting Slicks
Joined: Mar 2008
Posts: 2,835
Likes: 5
From: Avon Park FLORIDA
St. Jude Donor '08-'09-'10
Most 20" wheel and tire are usually taller than the 19 stock
my 20's 305/35/20 are 27.2 and stock are 26. so you need to tell the ECU to recalibrate the speedo/gear change/roll out diff.
Phil
my 20's 305/35/20 are 27.2 and stock are 26. so you need to tell the ECU to recalibrate the speedo/gear change/roll out diff.
Phil
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
Stock C6 has different tire diameters front and rear, if you want the Active Handling to function you have to retain the different diameters, Stock front is 25.4" and stock rear is 26.7".
http://www.1010tires.com/TiresizeCalculator.asp or
http://www.miata/garage/tirecalc.html
http://www.1010tires.com/TiresizeCalculator.asp or
http://www.miata/garage/tirecalc.html
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
Drifting
Joined: Jul 2005
Posts: 1,969
Likes: 8
From: NJ
The run out is what is important like mentioned. If he has 20s on all corners with the same size tires it will throw the TCS off. I've got 19/20 setup and the diameter is within 5% of the stock sizes. No issues at all.
Race Director
Joined: Sep 2001
Posts: 11,907
Likes: 1
From: Between a rock and a hard place, S.E. PA
Listing actual tire sizes could help determine just how far off the "almost spot on" sizes are in reality.
An improper setup installed by a professional could have "lawsuit" written all over it. Fix it before it's too late.
An improper setup installed by a professional could have "lawsuit" written all over it. Fix it before it's too late.
Le Mans Master
Joined: Jan 2005
Posts: 5,611
Likes: 5
From: Thousand Oaks California