1968 tire size
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Le Mans Master
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From: Richmond Kentucky
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1968 tire size
What is the largest tire that can be used on a stock bodied 68 with stock wheels and stock suspension?
Thanks,
Rex
Thanks,
Rex
Safety Car
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From: Lafayette Louisiana
one piece of data, anyway.
I do not know the answer to your question, but I can tell you I put 255 60 15's BFG on AG rims on my all stock 68 and everything clears ok. However, there is not any extra room anywhere either.
Hope this might help.
Drifting
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Le Mans Master
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From: Richmond Kentucky
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I should have clarified.............................I' m looking for 15 inch tires. 
Thanks,
Rex
Thanks,
Rex
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Le Mans Master
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Has anyone used a 255-70 x 15 tire on a 68 Corvette with stock 7 inch wheels, stock suspension and no flared fenders? Any issues?
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From: New Or-leens Loo-z-anna
You probably would have to be careful when making hard turns with 255's.
Just a rookie guess though.
Burning Brakes
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From: Crestline CA
When I got my 68 it had 255/60-15s on 15x8s, never heard it rub but there were slight rub marks on the frame where it opened up behind the front wheels. I once put 245/60-15s Radial T/As on 15x7s(not on a corvette) and I dont think Id go any wider(looked funny) although you might get away with it in a 70 series tire.
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From: New Or-leens Loo-z-anna
When I got my 68 it had 255/60-15s on 15x8s, never heard it rub but there were slight rub marks on the frame where it opened up behind the front wheels. I once put 245/60-15s Radial T/As on 15x7s(not on a corvette) and I dont think Id go any wider(looked funny) although you might get away with it in a 70 series tire.
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From: Crossville TN
The widest tire you can install on a '68 that will NOT rub ...guaranteed... is a 235R60-15 (assuming that you want an R60-15 tire). Some folks have installed 245's with no problem; others get rubs with that size.
Safety Car
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235 x 60 will safely fit, anything larger than that, and you may run into fitment issues. good luck
I just remembered these 16 not 15 Dia. . ....sorry for any confusion !
pic of 235 x 60 Tire front and back, the rear spring had not quite settled down yet in this pic.
I just remembered these 16 not 15 Dia. . ....sorry for any confusion !
pic of 235 x 60 Tire front and back, the rear spring had not quite settled down yet in this pic.
Last edited by 69Vett; Mar 19, 2015 at 06:47 PM. Reason: add pic.
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Le Mans Master
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Thanks everyone for your input. I am now considering the old 70 series tires............................specifi cally 255-70x15....... 29 inches tall and 10 inches wide, on a 15x7 American Racing Torque Thrust D,. with 3.75 inch back spacing. Anybody have experience with this particular size tire?
Thanks in advance for your help.
Rex
Thanks in advance for your help.
Rex
Melting Slicks
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From: San Diego California
Dr L-88,
I can only answer the question If you go too big, you end up with this:
Driver's side.
Pax side.
My project came with some old tires I never checked out as to their size, on a set of spare stock steel rims. I trashed the tires, powder coated the 8X15 wheels, and put 225 X 70R 15 Cooper Cobras on them. About as close to G70's as possible without breaking the bank.
Steve
I can only answer the question If you go too big, you end up with this:
Driver's side.
Pax side.
My project came with some old tires I never checked out as to their size, on a set of spare stock steel rims. I trashed the tires, powder coated the 8X15 wheels, and put 225 X 70R 15 Cooper Cobras on them. About as close to G70's as possible without breaking the bank.
Steve
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From: Crossville TN
70 series tires in that width would be HUGE! You want the OD of the tire to be about the same as the OD of the stock tires. The 235R60-15 diameter is almost identical to the F70-15 tires (stock on '71's).
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Le Mans Master
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Actually I was considering the 255s for the rear only in order to "fill up" the wheel well a little better, but after looking at the car, I think I'll just keep the repro Firestone race tires on it. They look pretty cool. 
Thanks for everyone's input.
Thanks for everyone's input.
Instructor
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Beautiful tribute car. Like your parts. That's the right size tire for the #3. Guess you have seen the larger rear size on the #2 DX. Think it must be the 29.9 almost 9" wide. Coker? How do they drive on the street?
Have looked for pictures of the #3 car when Fred Kepler raced it for Quaker State. You wouldn't possibly have one with the QS colors?
Sometime would like to order the AIR extension!
Have looked for pictures of the #3 car when Fred Kepler raced it for Quaker State. You wouldn't possibly have one with the QS colors?
Sometime would like to order the AIR extension!
Last edited by racervette69; Mar 22, 2015 at 08:31 AM.
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Le Mans Master
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From: Richmond Kentucky
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Beautiful tribute car. Like your parts. That's the right size tire for the #3. Guess you have seen the larger rear size on the #2 DX. Think it must be the 29.9 almost 9" wide. Coker? How do they drive on the street?
Have looked for pictures of the #3 car when Fred Kepler raced it for Quaker State. You wouldn't possibly have one with the QS colors?
Sometime would like to order the AIR extension!
Have looked for pictures of the #3 car when Fred Kepler raced it for Quaker State. You wouldn't possibly have one with the QS colors?
Sometime would like to order the AIR extension!
https://books.google.com/books?id=el...rvette&f=false
http://www.c3registry.com/index.php?...te&car_id=6688
Last edited by Dr L-88; Mar 23, 2015 at 10:34 AM.
Instructor
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Thanks for the kind words. I was not aware that the #3 DX car went on to life another life as Fred's car. Here is a link that shows the QS paint scheme. It's in Pete Gimenez's book, Corvette Racing Legends.
https://books.google.com/books?id=el...rvette&f=false
http://www.c3registry.com/index.php?...te&car_id=6688
https://books.google.com/books?id=el...rvette&f=false
http://www.c3registry.com/index.php?...te&car_id=6688
Like the registry of corvette race cars. Own two that are listed in the registry.
http://registryofcorvetteracecars.com/
Last edited by racervette69; Mar 22, 2015 at 06:33 PM.