Tire and Wheel Fitment Question for Rear 1968 Chevelle? - Chevelle Tech
Wheels & Tires What fits what?
Sponsored by:Discount Tire

LinkBack Thread Tools Search this Thread Display Modes
post #1 of 3 (permalink) Old Nov 23rd, 12, 8:28 PM Thread Starter
Tech Team
Join Date: Jan 2010
Location: NY
Posts: 133
Tire and Wheel Fitment Question for Rear 1968 Chevelle?

I'm looking to change out my rear wheels and tires and I would like to know if a set of 8" SS steel wheels with 4.5" inside offset will fit a stock setup and a set of 295/50R15 will fit under the wells 26.7" tall by 10" wide, 1968 Chevelle 12 bolt GM posi stock ride hight.
OURSS396 is offline  
Sponsored Links
post #2 of 3 (permalink) Old Nov 24th, 12, 12:59 PM
Senior Tech Team
Join Date: Apr 2011
Location: Ottawa, On, Canada
Posts: 3,302
Re: Tire and Wheel Fitment Question for Rear 1968 Chevelle?

Does your car have it's factory wide rear end ?

Do not know anyone who makes a 295/50/15 tire that has a Side Wall Width of only 10", who is the tire maker & model # ??

A 15" x 8" Rim with a 4.5" to 4.75" maybe 5" BackSpace has been known to fit other guys cars,
but it all depends on how much room there is in your car's Fender Wells.

Backspace of the mounting rim and the tires Side Wall Width & Diameter play the biggest part
in whether a 8" or 10" rim and a big tire will fit within your cars Fender Wells.

The stock factory Rear Ends in 68 - 72 Chevelles are wider than the 64 - 67s.

A. First you should clarify which Rear End width you have in your car .
Here is the source for rear end widths http://chevellestuff.com/qd/generic_rear_axle_info.htm
* 1964-67 Chevelle rear ends were manufactured by the Chevrolet Gear and Axle Division.
The housing measures 53.25 inches from backing plate to backing plate
and with the brake drums in place, the total width is 60.00 inches.
Axle tube flange-to-flange is 54.25 inches.
* 1968-72 Chevelle rear end housings measure 58.5 inches from flange to flange,
and with the brake drums in place, the total width is 62.5 inches.
(Note: Other sources put the total width at 61.125" to 61.25".)
Axle tube flange-to-flange is 55.25 inches.
* A second measurement to check is centerline distance between spring perch seats.
1964-1967 are 35 1/16 inches between seats
where 1968-1972 are 34 31/32 inches.

B. How much room do you have in your Rear Fender Wells ?
eg. from outside to inside, Fender Lip to Frame/Wheel Well
from front to back of outside part Fender Well
By measuring the room you have in your fender wells from the inside of
the outer finder lip to the frame/ inner finder well for width
and the max room from front to back within the fender well as well .
eg. Basically there are various measurements to be made within the rear fender wheel wells;
1. RIM SPACE inside curved lip of Rim to bottom part of Shock Nut for DR & Pas Sides
(DR Side = ? PASS Side = ? )
2. OUT SPACE from inside Lip of outside Fender to Side Wall of Tire for DR & Pas Sides
(DR Side = ? PASS Side = ? )
3. IN SPACE from Side Wall of Tire to Frame/inside face of Fender well for DR & Pas Sides
(DR Side= ? PASS Side= ? )
4. WheelWellSpace from inside of bodyfender to frame/fender = ?? "
and from grd to top of the inside of fender well = ?? + height / diam
5. SPACE from Face of Rear Brake Hub to Shock Nut = ? DR & PASS sides
6. SPACE from inside of Fender to Face of Rear Brake Hub = ?
7. Rear End Width from face of mounting surface on Drum/Disc Brake DR side to PASS side = ?? "
8. SPACE from Front of Fender Well to front of current tire when mounted to rear end .

C. What are your current rims & tires measurement details ?
eg. rim width & backspace / tire Sidewall Width / Diameter (height of tire)
The Backspaceing of a 8" or 10" rim will depend on the measurements of
your Fender Wells width & height and the width of the rear end you currently have in your 68.
And each side can be different !

Other items can also obstruct your rim & mounted tire,
eg. outside front part of your Fender Well if the tire is to hi / rear lower shock bolt / exhaust pipes etc .

67 Chevelle Malibu SS Cdn
Born 283 / PG / A51
Now 468/Th400 2,500 stall/ S60 3.70 Gs
Prev M&H MSS001 street Tires/dress 2015/9/20
60' = 1.756 1/8 = 7.815 et / 89 mph
1/4 = 12.253 et / 111 mph
NEW Best on M/T S/R #6641 street Tires/dress 2016/10/9
60' = 1.720 1/8 = 7.747 et / 89 mph
1/4 = 12.112 et / 112 mph
Kirk's67SS is offline  
post #3 of 3 (permalink) Old Nov 25th, 12, 8:47 AM
Lifetime Premium Member
Join Date: Mar 2006
Location: South Carolina
Posts: 4,354
Re: Tire and Wheel Fitment Question for Rear 1968 Chevelle?

I wouldn't put any bigger than a 275 wide tire on a 8" wide wheel.

I never make mistakes, but on occasion I present myself with an opportunity to get very creative.
animal69 is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Old Thread Warning
This Thread is more than 1644 days old. It is very likely that it does not need any further discussion and thus bumping it serves no purpose.
If you still feel it is necessary to make a new reply, you can still do so though.

Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome