Bronco Hut  
 

   Ford Bronco Parts - Classic Vintage Early Bronco Parts   Toms Bronco Parts   BC Broncos
Community
 Message Forum
 Photo Gallery
 Event Calendar
 Book Reviews
 Bronco Wallpaper
 Bronco FAQ
 
 600+ Bronco Links!
 
Search all Bronco Links
Buy / Sell
 Classifieds / Want Ads
 Vendor Forum
Rust Bullet
Bronco Tech
Recent Tech Articles
 •Holley Carb Tips
 •Aussie Locker
 •C6 203 205 Doubler
 •4 Link
 •Clutch Replacement
 •Early Turn Signals
 •C4 Improvements
 •Threaded Dipstick
 •NV3550 5 spd
     More Tech...
Bronco Auctions

Welcome to the ClassicBroncos.com Forums.

You are currently viewing our boards as a GUEST which limits your access to viewing only. To take advantage of all the forum features please take a moment to register. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact the admin. If you've lost your password click here.

Go Back   ClassicBroncos.com Forums > Archives > Bronco Tech - Archives

 
 
Thread Tools
Old 01/18/10, 05:22 PM   #1
malibubronco
Full Member
 
Newbury Park
Joined: Jan 09
Posts: 200
Original EB Tire Size

What size tires do I look for If I want something close to the
original EB size.? The only tire I have left is the orig. spare
and it just says 15x7. Thanks!!
malibubronco is offline  
Old 01/18/10, 05:26 PM   #2
Jonboy69
Full Member
 
Joined: Jan 09
Posts: 340
225 75 15 is probably a current size that is close to the original. I think original size was like a g78 x 15 but not sure what exactly it means. Do you have a stock & uncut bronco you are trying to make 100% correct ? I just removed 235 75 15 tires from my stocker because I wanted to go a bit bigger & more aggresive. I put on BFG 30 x 9.5 x 15 & this is about as big as you can get on a stock/uncut.
Jonboy69 is offline  
Old 01/18/10, 06:36 PM   #3
Quick & Dirty
Sr. Member
 
Joined: Feb 04
Posts: 544
Original tires varied by load rating
E78 x 15
G78 x 15
L78 x 15
7.00 x 15

The 7 x 15 was the heavy duty truck tire, the others were passenger car tires.

Here is a conversion chart from the old bias designations to the modern.

http://www.vintagecarconnection.com/...sion_chart.htm
Quick & Dirty is offline  
Old 01/18/10, 06:41 PM   #4
deltarat
Contributor
Bronco Guru
 
deltarat's Avatar
 
Drew,Ms
Joined: Jul 06
Posts: 3,228
Quote:
Originally Posted by Quick & Dirty View Post
Original tires varied by load rating
E78 x 15
G78 x 15
L78 x 15
7.00 x 15

The 7 x 15 was the heavy duty truck tire, the others were passenger car tires.

I believe the 7" was tread width rather than section width as modern tires are measured. 7" = 178mm, so a 225 section width would probably be close.
What height are stock tires? Trying to figure the ratio for 35s back to stock.

It's OK to give out, but NEVER give up.
deltarat is offline  
Old 01/18/10, 06:42 PM   #5
blubuckaroo
Contributor
Bronco Guru
 
blubuckaroo's Avatar
 
Ridgefield WA
Joined: Jun 07
Posts: 6,443

My Gallery
Our '77 came with Firestone G78-15 fiberglass belted tires and it had the 4900 lb package.

'77. 2" suspension lift, 1" body lift, 32" tires. 302, Windsor Jr heads, 4bbl, headers. NV3550, 4.11s, Yukon posi.
Vintage Air, Pioneer tunes, Toms seats.
All the comforts!
blubuckaroo is offline  
Old 01/18/10, 06:57 PM   #6
Quick & Dirty
Sr. Member
 
Joined: Feb 04
Posts: 544
I have the owners manual for my 74, and it lists the E78 for 4300 and 4450, and G78 for 4500 and 4900. I believe the larger sizes were optional.

Here is another conversion chart

http://www.angelfire.com/on/geebjen/tires.html

It lists the E78 as 26.6" the G78 as 27.7"

Diameter of P metrics are easy to calculate. Say 225/75-15
225 is the section width, 75 is the aspect ratio.
225 x .75 = 168.75 this is the height from tread to rim

168.75 x 2 = 337.5mm = 13.29
13.29 + 15 = 28.28"
Quick & Dirty is offline  
Old 01/18/10, 07:19 PM   #7
malibubronco
Full Member
 
Newbury Park
Joined: Jan 09
Posts: 200
Thanks for all the great info. Anyone is Thousand Oaks Ca area want to get rid of some stock tires let me know! Thanks again guys!!!
john
malibubronco is offline  
Old 01/18/10, 10:38 PM   #8
mlaird
Sr. Member
 
mlaird's Avatar
 
Houston,TX
Joined: Jun 09
Posts: 421

My Gallery
nebraska tire has some 7-15 mud tires for $69 right now. that size is almost obsolete with aggressive tread
mlaird is offline  
 

  ClassicBroncos.com Forums > Archives > Bronco Tech - Archives

Thread Tools

Forum Jump


All times are GMT -6. The time now is 11:05 PM.


Bulletin Board Software by: vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.


This site created, owned and maintained by Jon Hanna
Copyright 1996-2014 All rights reserved. Privacy Statement
ClassicBroncos.com is not affiliated with Ford Motor Company