Tire Size
Thread Starter
Instructor
Joined: Jun 2010
Posts: 120
Likes: 1
From: CT
Tire Size
I’m currently running old Dunlop Qualifier 225/70/15s on post 76 aluminum wheels. I need to replace the tires and have seen many C-3s with 235/60/15 BF Goodrich ties on the front and 245/60/15s on the rear with OEM 15X8 wheels.
Anyone know if there are any significant tire rub issues before I go and spend the money?
Anyone know if there are any significant tire rub issues before I go and spend the money?
Thread Starter
Instructor
Joined: Jun 2010
Posts: 120
Likes: 1
From: CT
Well I'm a 75
I eventually want to go with American Racing Torque Thrusts 15x8.5 Boltpattern 5x4.75 (5x120.65) Offset -25 Hub Bore 83.06 Partnumber VN1055861. Corvette Central sells these as a C-3 direct fit.
I still need to replace the old Dunlops from 1993. They are hard and beginning to split in the centers.
I have seen many many Corvettes with the 235 in front and 245 in back. they are typically 71-71 and even earlier though.
I eventually want to go with American Racing Torque Thrusts 15x8.5 Boltpattern 5x4.75 (5x120.65) Offset -25 Hub Bore 83.06 Partnumber VN1055861. Corvette Central sells these as a C-3 direct fit.
I still need to replace the old Dunlops from 1993. They are hard and beginning to split in the centers.
I have seen many many Corvettes with the 235 in front and 245 in back. they are typically 71-71 and even earlier though.
Instructor
Joined: Jun 2011
Posts: 183
Likes: 1
From: Litchfield CT
Well I'm a 75
I eventually want to go with American Racing Torque Thrusts 15x8.5 Boltpattern 5x4.75 (5x120.65) Offset -25 Hub Bore 83.06 Partnumber VN1055861. Corvette Central sells these as a C-3 direct fit.
I still need to replace the old Dunlops from 1993. They are hard and beginning to split in the centers.
I have seen many many Corvettes with the 235 in front and 245 in back. they are typically 71-71 and even earlier though.
I eventually want to go with American Racing Torque Thrusts 15x8.5 Boltpattern 5x4.75 (5x120.65) Offset -25 Hub Bore 83.06 Partnumber VN1055861. Corvette Central sells these as a C-3 direct fit.
I still need to replace the old Dunlops from 1993. They are hard and beginning to split in the centers.
I have seen many many Corvettes with the 235 in front and 245 in back. they are typically 71-71 and even earlier though.
Wheel backspacing is critical for clearance. if you keel it 4" or less, you can go as large as my old car.
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
Advanced
Joined: Jan 2010
Posts: 65
Likes: 0
From: Houston TX
I have a '75 with 255/60-15's on all 4 wheels. The fronts rub when I cut the steering wheel all the way, say when I'm backing out of my garage. I pulled a rear tire recently and there were slight rub marks higher up on the fender well, so I'm guessing the rear rubs when the car bottoms out.
Racer
Joined: Feb 2010
Posts: 362
Likes: 10
From: nashville tn
Instructor
Joined: Oct 2005
Posts: 244
Likes: 1
From: Brighton Michigan
I have a 74. Just put 225/70/15 BF Goodrich T/A's on stock rims...proper clearance....they look sweet! Not the best picture, but I'll try to get a couple others posted. 
Last edited by Peeps9823; Jun 23, 2011 at 02:40 PM.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
The nice thing about the 255/60/15 tires is that they are about the same diameter (about 1/3rd of an inch shorter) as the 225/70/15 tires, so they fill up the fender opening properly, and there is very little speedometer inaccuracy. A 235/60/15 will have a smaller diameter than a 255/60/15. I'm not sure if it would be noticeable to the naked eye, but here are some numbers I got from a pretty cool calculator online.
http://www.1010tires.com/TireSizeCal...?action=submit
225/70/15 diameter:27.40 in
255/60/15 diameter:27.04 in % difference:1.32%
235/60/15 diameter:26.10 in % difference:4.75%
Scott
http://www.1010tires.com/TireSizeCal...?action=submit
225/70/15 diameter:27.40 in
255/60/15 diameter:27.04 in % difference:1.32%
235/60/15 diameter:26.10 in % difference:4.75%
Scott
