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.
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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
