Mombu the Chevrolet Forum sponsored links

Go Back   Mombu the Chevrolet Forum > Chevrolet > '69 Vette Correct Tire Size
User Name
Password
REGISTER NOW! Mark Forums Read

sponsored links


Reply
 
1 17th May 02:05
charles halliman
External User
 
Posts: 1
Default '69 Vette Correct Tire Size


I've been running the following tire size on my vette for years:
225-70-R15. I now believe that the tires may be causing my fender to
crack along the seams. If I turn the wheel, and hit a bump, the under
side of the fender sometimes touches the tire.

I'm considering a slightly smaller sized tire to try to correct the
possible problem. I'm considering the following time sizes: 215-70-R15;
215-65-R15; 205-75-15; 225-60-R15.

Here are my questions:

1. Are the 225-70-R15 tires causing anyone fender-crack problems on
their
'68-'72 C3?
2. What tire size do most people run on '68-'72 vettes?

Thanks,
Charles


-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----
  Reply With Quote


  sponsored links


2 17th May 02:06
tom in missouri
External User
 
Posts: 1
Default '69 Vette Correct Tire Size


I've run 235/60R-15 on a '68 with 8 inch Rally wheels with no rub. The '68
and '69 have slightly smaller fenders than the '70 to '72.

If you are running the 7 inch Rallies, you are missing out on what your car
can do. Only use the 7s for show on a '68. The '69 should have the 8 inch.

I found 255/60R-15 to rub the emergency brake cable bracket on a '68 with
the Rally wheels. The Aluminum '76-up Corvette wheels have about 3/8 - 1/2
inch more offset and so a 255/60R-15 will fit the rear with the Aluminum
wheels. I can't remember if they rubbed anywhere on front.

In '78, they put the 255/60R-15 on as the optional tire. They did trim the
underside of the fender lip at the factory.

Many are putting 50 series and 40 series on 16 inch rims and getting even
wider. Something to think about.

You can put a lot more tire under with the lower profile series and get much
better handling.

Your original size was F70-15, which if memory serves is a 215/70 - 15.

If you are running aftermarket wheels, then you need to be sure that your
backspacing is the same as the rally wheels (3-1/2 inches) and the wheel is
8 inches wide.

Do not go skinnier because you will not like the way it handles. Let's say
it is embarrassing that nearly any Chevy truck will go faster through the
curves than your Corvette on skinny tires.

Simple solution - Your Corvette isn't a 4wd truck with 20 inches of
suspension travel. Don't hit bumps when you turn the wheel.
  Reply With Quote
3 17th May 02:06
charles halliman
External User
 
Posts: 1
Default '69 Vette Correct Tire Size


This means that 225-60-R15's would work fine, I'm assuming.

The 225-60-R15's should handle about like the 225-70-R15's, don't you think?


Well, that's one of the options. I've been told by tire people that other
compatible options are 215-70-R15, 215-65-15 and 205-75-R15.

How do you do this? Sometime you can't help it.. Charles


-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----
  Reply With Quote
4 17th May 02:07
fast1970vette
External User
 
Posts: 1
Default '69 Vette Correct Tire Size


Tom had good info ; im running a set of 255x60r15's on my 1970 without
any problems with clearance. I used to have 235x70r15's ..... the 255's
put more meat to the road and handling is greatly improved.

Dave

___________________________________________
'Wrap your be-hind in fiberglass , and drive a piece of Americana'
___________________________________________
  Reply With Quote
5 17th May 02:07
charles halliman
External User
 
Posts: 1
Default '69 Vette Correct Tire Size


Dave,

My primary problem here is cracks in the fender when I turn the wheel. So,
let me ask you: Even though the clearance on my '69 might be different from
the clearance on your '70, did the 235-70-15's contribute to any cracks
along the seam of either of your fenders?

Charles

-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----
  Reply With Quote
6 17th May 02:07
charles halliman
External User
 
Posts: 1
Default '69 Vette Correct Tire Size


Dave,

I my last note, I meant to say that I have a problem when I turn the wheel,
and HIT A BUMP. the fender sometimes comes in contact with the turned tire,
and may be contributing to cracks that eventually appear in the seam of my
fender.

Have you seen this problem with any of the tires you've used on your '70
vette?

Charles


-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----
  Reply With Quote
7 17th May 02:07
joe m
External User
 
Posts: 1
Default '69 Vette Correct Tire Size


Charles... If you are talking about the horizontal seams toward the top of
all four fenders, these began to show after only a few years on many of
these cars. It is the result of the fiberglass and/or bonding material
shrinking which causes cracks in the paint along the seam. I don't think
minor tire contact with the fender would accelerate this "aging" process.

My 72 shows the seams all up and down both sides. I am running 235/70-15s
which contact the fender lip slightly on turns ( I plan to change to 225s).
As others have said, you can go with 255/60s or 215/70s to stop the contact.

Good luck - Joe, 72 coupe
  Reply With Quote
8 17th May 02:07
charles halliman
External User
 
Posts: 1
Default '69 Vette Correct Tire Size


Joe,

I'm considering 225-60-R15. This would retain the width I now have, but lower
the height of the tire. I'm hoping this will greatly minimize the fender
contact. In your opinion, am I right about this?

Charles


-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----
  Reply With Quote
9 17th May 13:26
fast1970vette
External User
 
Posts: 1
Default '69 Vette Correct Tire Size


Charles, Cracks on the top seams of corvette fenders is part of the
trademark with all C3's . I doubt it was because of the 235x70R15's i
had on there....i think they are a combo of stress and most likely poor
preparation of surface by whoever painted my corvette last.

Dave

___________________________________________
'Wrap your be-hind in fiberglass , and drive a piece of Americana'
___________________________________________
  Reply With Quote
10 17th May 13:29
joe m
External User
 
Posts: 1
Default '69 Vette Correct Tire Size


The 225/60 is about 2 inches in diameter smaller than the 225/70. This
should run with no fender contact, but will also put the car 1 inch closer
to the ground increasing the odds of chassis parts contacting the road!.. If
fender contact is only slight when turning, I would try the 215/70-15 (this
is the modern equivalent of the original F70-15)...
This should give fender clearance without losing too much ground clearance.
You don't need more tire width unless you are into hard cornering. Use the
225/60 in that case. - Joe
  Reply With Quote
Reply


Thread Tools
Display Modes




Copyright 2006 SmartyDevil.com - Dies Mies Jeschet Boenedoesef Douvema Enitemaus -
666