Go Back   Corvette Forum > C3 Corvettes, 1968 - 1982 > C3 General
Sign in using an external account
Register Forgot Password?
Register Search Today's Posts Mark Forums Read FAQ Vendor Directory
Search
C3 General
General C3 Corvette Discussion not covered in Tech Sponsored by
Corvette America

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!


Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 06-06-2005, 09:27 PM   #1
1968 L79
Junior Member
 
Member Since: Oct 2004
Default 1968 tire size

First im a new guy so thanks in advance for your help. I have a 68 conv with the L79, 4 spd, posi. I bought it new in 68 and its been in and out of storage these many years. It has 30K original miles on it.
When I got the car, I put 1968 ...8 1/2 by 15 american s TT on it and later changed the tires to....yeah old size F-70 by 15 and G70 by 15 Goodyear polyglas tires which have lasted until now. While the tread is still good.....the sidewalls look a little sick...since its summer ,its time for new ones...while I have the orginal 68 wheels etc I kind of want to keep the americans.......my question, finally ...It looks like 215 and 225 by 70 tires will fit...wondering about 225, 235, 245 by 60 fitting without rubbing, either on the ralleys or the americans. I am concerned about the tires sticking out too far from the fenders, ie the actual tread width . Anybody with a 68 have any comments....suggestions thanks again BIll
1968 L79 is offline   Reply With Quote
Old 06-06-2005, 09:46 PM   #2
catfishgeez
CF Member
 
catfishgeez's Avatar
 
Member Since: Mar 2003
Location: Orlando Fl
Default

I have (believe it or not) F60 x 15 on my rear. I bought these tires back in 1978. They are on 10 inch rims. These are eqivilent to 235/60/R15. They donot extend past the fender. Originally when Ibought the car it had L60 x 15.
catfishgeez is offline   Reply With Quote
Old 06-06-2005, 10:40 PM   #3
BigBlockk
CF Senior Member
 
Member Since: Sep 2004
Location: North Bend Ohio
Default

The 225/70/15 is a good all around tire size. I had these on the front of my '70 with no rubbing. I ran 255/70/15 on the rear with no rubbing. These are both on 8" wheels.

BigBlockk

Later.....
BigBlockk is offline   Reply With Quote
Old 06-06-2005, 10:56 PM   #4
68/70Vette
CF Senior Member
 
Member Since: Jul 2004
Location: Torrance California
Default

My 1968 had, up until a year ago, G70-15 tires. These were mounted on the stock 1968 wheels.

Time to replace your wheel diameter? Unless you're NCRS oriented, it's probably time to start thinking about modern wheel diameters. To get a good selection of tires, you really need to get away from 15 inch wheels. CorvetteFever magazine did an article about wheels/tires a year or so ago. Maybe you can access the article on their website. Actually for performance tires, there are only a few 16 inch tires available. For a good selection of tires, you have to move up to 17 inch wheels.

I chose Wheel Vintiques 17 inch wheel that looks like the standard stock C3 rally wheel. That is "looks like" from a distance of maybe 15 feet. The wheel is all aluminum. Polished to replicate the "beauty rim" and grey powder painted in the center. It has the rally wheel hat. I have mounted 225/50 R17 tires. This tire/wheel combination resulted in a 1/4 inch clearance with the emergency brake bracket on the trailing arm. I switched over to offset trailing arms just to be safe.
....................

Some of the websites have drawings telling you what the dimensions mean, for example 225/50 R17. After I bought my wheels, I made cardboard templates of the tire cross dimension. With my unmounted wheel on the car, I used my cardboard template to scan and sweep around the wheel rotation looking for interference. The 225/50 R17 looked tight but ok. With only 1/4 inch clearance, I later chickened out and went for the offset trailing arms to get rid of any possible interference problem.
68/70Vette is offline   Reply With Quote
Old 06-06-2005, 11:05 PM   #5
Todd68
CF Senior Member
 
Todd68's Avatar
 
Member Since: May 2004
Location: Eagle WI
Default

I've got 235/60/15 on front 245/60/15 on rear (all 8" wide rims) no issues with rubbing. See My Corvette Photos for pics. Used to have 245/60/15 on front, no rubbing either.

Have you seen this article:

More Bite for Old Sharks

Click the image to open in full size.
Todd68 is offline   Reply With Quote
Old 06-07-2005, 09:43 AM   #6
BlueL36
CF Senior Member
Cruise-In V Veteran
Cruise-In VI Veteran
 
BlueL36's Avatar
 
Member Since: Mar 2002
Location: End of the Ike IL
Default

Hiyas to another '68 owner

When I replaced my tires, I explored all options. My concerns centered on rubbing, speedometer error, and wandering. I decided to keep the stock 215R70x15 size to eliminate all of those concerns. I could've gone with 225's, but the diameter would have thrown the speedo off and there was a small chance the tires would rub on turns. I was thinking 255R60x15, but there was a chance of rubbing both the front on turns and e-brake besides wandering on grooved roads. So, since mine is a cruiser, I decided to stay stock. Good luck with your decision.
__________________

'68 Roadster
enjoy the ride
BlueL36 is offline   Reply With Quote
Old 06-08-2005, 11:01 PM   #7
1968 L79
Junior Member
 
Member Since: Oct 2004
Default

Quote:
Originally Posted by catfishgeez
I have (believe it or not) F60 x 15 on my rear. I bought these tires back in 1978. They are on 10 inch rims. These are eqivilent to 235/60/R15. They donot extend past the fender. Originally when Ibought the car it had L60 x 15.
thanks for the info
1968 L79 is offline   Reply With Quote
Old 06-08-2005, 11:05 PM   #8
1968 L79
Junior Member
 
Member Since: Oct 2004
Default

Quote:
Originally Posted by BigBlockk
The 225/70/15 is a good all around tire size. I had these on the front of my '70 with no rubbing. I ran 255/70/15 on the rear with no rubbing. These are both on 8" wheels.

BigBlockk

Later.....
Thanks.....my concern is that the 68 had smaller wheels and no flares which may impact the size...and then i added the americans to the mix....then g's in the back have a slight rub now with two on board and a full tank if i stick to the 70s i think i will go with 215 in front and 225 in back.....bill
1968 L79 is offline   Reply With Quote
Old 06-08-2005, 11:06 PM   #9
1968 L79
Junior Member
 
Member Since: Oct 2004
Default

Quote:
Originally Posted by 68/70Vette
My 1968 had, up until a year ago, G70-15 tires. These were mounted on the stock 1968 wheels.

Time to replace your wheel diameter? Unless you're NCRS oriented, it's probably time to start thinking about modern wheel diameters. To get a good selection of tires, you really need to get away from 15 inch wheels. CorvetteFever magazine did an article about wheels/tires a year or so ago. Maybe you can access the article on their website. Actually for performance tires, there are only a few 16 inch tires available. For a good selection of tires, you have to move up to 17 inch wheels.

I chose Wheel Vintiques 17 inch wheel that looks like the standard stock C3 rally wheel. That is "looks like" from a distance of maybe 15 feet. The wheel is all aluminum. Polished to replicate the "beauty rim" and grey powder painted in the center. It has the rally wheel hat. I have mounted 225/50 R17 tires. This tire/wheel combination resulted in a 1/4 inch clearance with the emergency brake bracket on the trailing arm. I switched over to offset trailing arms just to be safe.
....................

Some of the websites have drawings telling you what the dimensions mean, for example 225/50 R17. After I bought my wheels, I made cardboard templates of the tire cross dimension. With my unmounted wheel on the car, I used my cardboard template to scan and sweep around the wheel rotation looking for interference. The 225/50 R17 looked tight but ok. With only 1/4 inch clearance, I later chickened out and went for the offset trailing arms to get rid of any possible interference problem.
thanks for you thoughts.....
1968 L79 is offline   Reply With Quote
Old 06-08-2005, 11:09 PM   #10
1968 L79
Junior Member
 
Member Since: Oct 2004
Default

Quote:
Originally Posted by Todd68
I've got 235/60/15 on front 245/60/15 on rear (all 8" wide rims) no issues with rubbing. See My Corvette Photos for pics. Used to have 245/60/15 on front, no rubbing either.

Have you seen this article:

More Bite for Old Sharks

Click the image to open in full size.
I had read that article before but had forgotten about it thanks for the reminder...photos are a great help and the fact you had them on 8 inch rims...your ride looks just right......very helpful ...bill
1968 L79 is offline   Reply With Quote
Old 06-08-2005, 11:14 PM   #11
1968 L79
Junior Member
 
Member Since: Oct 2004
Default

Quote:
Originally Posted by BlueL36
Hiyas to another '68 owner

When I replaced my tires, I explored all options. My concerns centered on rubbing, speedometer error, and wandering. I decided to keep the stock 215R70x15 size to eliminate all of those concerns. I could've gone with 225's, but the diameter would have thrown the speedo off and there was a small chance the tires would rub on turns. I was thinking 255R60x15, but there was a chance of rubbing both the front on turns and e-brake besides wandering on grooved roads. So, since mine is a cruiser, I decided to stay stock. Good luck with your decision.
Your right the 225 is a little larger.....if i change to the stock rims I might follow you lead.......thnaks for your answer ,,bill
1968 L79 is offline   Reply With Quote
Old 06-09-2005, 07:48 AM   #12
holley505
CF Senior Member
 
holley505's Avatar
 
Member Since: Nov 2004
Location: Longwood Florida
Send a message via Yahoo to holley505
Default

255/60R15 fit on my car at all four corners....w/ factory 15x8 wheels

Current I have 205/15 in the front on 15x4 rims and 275/60R15 drag radials on the back. 15X8 rims

Plan to upgrade to C5 wheels
__________________
Old time 12.03@114.6 1.72 60ft old setup
1/8th mile 6.9@100 1.52 60ft
1/4 mile 10.75 with 3rd gear@125!


One owner 77 vette ** LS3 stroker with a CARB! It RUNS! TS&P 418 wicked cubes

00 SLP SS M6 Camaro sold
00 FRC cam and headers 375rwhp with ls1 intake
holley505 is offline   Reply With Quote
Old 06-09-2005, 10:47 AM   #13
CGGorman
CF Senior Member
 
CGGorman's Avatar
 
Member Since: Jun 2004
Location: Smile, it's just the internet.
Default

Quote:
Originally Posted by 68/70Vette
My 1968 had, up until a year ago, G70-15 tires. These were mounted on the stock 1968 wheels.

Time to replace your wheel diameter? Unless you're NCRS oriented, it's probably time to start thinking about modern wheel diameters. To get a good selection of tires, you really need to get away from 15 inch wheels. CorvetteFever magazine did an article about wheels/tires a year or so ago. Maybe you can access the article on their website. Actually for performance tires, there are only a few 16 inch tires available. For a good selection of tires, you have to move up to 17 inch wheels.

I chose Wheel Vintiques 17 inch wheel that looks like the standard stock C3 rally wheel. That is "looks like" from a distance of maybe 15 feet. The wheel is all aluminum. Polished to replicate the "beauty rim" and grey powder painted in the center. It has the rally wheel hat.
I had the same thoughts. Did the same thing.

To put a picture to the description, see my sig.
__________________
...this is my badass signature...
CGGorman is offline   Reply With Quote
Old 06-09-2005, 10:47 AM
 
Go Back   Corvette Forum > C3 Corvettes, 1968 - 1982 > C3 General
Reload this Page 1968 tire size
 
 
 
Reply

Tags
17, 1968, 68, c3, camaro, corvette, fenders, fits, inch, original, prevent, rally, rubbing, size, tire, tires, turning


Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -4. The time now is 04:24 PM.


Emails & Password Backup