Back tires, how big can I go? - Hot Rod Forum : Hotrodders Bulletin Board -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 08-22-2002, 09:37 PM
Join Date: Jul 2002
Location: Minot AFB, ND
Posts: 78
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post Back tires, how big can I go?

I have an 81 camaro with a soon to have 454. How large of a back tire can I run? I don't know much about this area. How, what and when do spacers come into play? How do I know if I need them? I don't want to tub it either. Just want to know how big I can go without cutting anything. Thanks for your help. Bill

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 08-22-2002, 10:34 PM
Halloweenking's Avatar
Fantastically cannibalistic!
Last photo:
Join Date: Mar 2002
Location: Spooksville
Posts: 1,353
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts

Bill! measure how deep your rear wheelwells are and you can get within an inch of that if your rims have the right backspacing.

Whats backspacing you ask? backspacing is where your center or the hub of the rim that bolts to your car is centerd at. Example, the rim is 10" wide if you habe 8" of positive backspace your rim hib will be two inches from the from of your rims allowing the wheel to fit inside the wheelwell without having the rim and tire stick out past the fender like a roller skate effect.

Go to your local tire place and ask them to help you out, you can go to yokohama and they have a nice informative pamflet type thing one wheel sizes and etc.

Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-23-2002, 04:20 AM
dollybud's Avatar
Last photo:
Join Date: Apr 2002
Location: Trenton, On. Canada
Age: 68
Posts: 181
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts

Bill: HK has pretty well said it! Wheel spacers will give you added backspace clearance. Make sure you have correct bolt pattern if buying new rims. If you have a Summit cataloque, check out page 252 for some tips. I'm looking to put MAXIMUM size slicks on my 67 without tubbing, anyone out there can help us with rim and tire sizes that have worked for his 81 and my 67? Thanks.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 08-23-2002, 05:28 AM
Registered User
Last wiki edit: Mopar tapered axle rear brake conversion
Last journal entry: What I'm doing now...
Last photo:
Join Date: Jan 2002
Posts: 4,263
Wiki Edits: 49

Thanks: 0
Thanked 8 Times in 7 Posts

Wheel spacers do nothing but move the rim to the outside of the car. They don't change the backspacing of the rim.

The way to do this correctly is to first measure the total width of the wheel well(measurement A in the link below). Then measure the distance from the inside of the fender well to the mounting surface of the rear end (measurement B). Now that you have those two measurements you need to determine the backspacing of your rims. To do this lay one on the ground with the outside of the rim towards the ground and lay straight edge across the inside lip of the rim (not the tire). Then measure the distance from this straight edge to the mounting surface. This is the amount of backspacing your rims have (measurement C).

With all these measurements in hand get a piece of graph paper and draw out the wheel well width and the location of the mounting surface of the rear end. Then draw in your wheel using the backspacing you measured and you can then see how much clearance you have. Don’t forget to allow for the width of the sidewall of the tire you’re planning to use and add at least 1 ” for clearance both on the inside and outside of the tire. Based on how your car measures out you may want to go with wider rims with different backspacing or in the best case scenario just a couple of wheel spacers, but in most cases there is more room to the inside of the tire than the outside and wheel spacers won't do the job.

Take a look at the link below to get an idea of how to draw this out so you can see what you have to work with. This is the only way to do this and be sure it will work.

<a href="" target="_blank"></a>

<a href="" target="_blank"></a>

[ August 23, 2002: Message edited by: Centerline ]</p>
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 08-23-2002, 07:23 AM
41willys's Avatar
Blowin' it
Last wiki edit: Choosing a trailer
Last journal entry: Running again...
Last photo:
Join Date: Aug 2002
Location: Cat Spring, Tx
Age: 41
Posts: 417
Wiki Edits: 11

Thanks: 0
Thanked 0 Times in 0 Posts

Another thing that can be done, and of course a lot easier, go to Discount Tire or another type wheel tire shop. They should have the tools that take precise measurements for rim size and tire combos. It doesn't get any easier than that...
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos

Quick Reply

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last 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 for yourself.
Email Address:
Please select your insurance company (Optional)


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.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

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

All times are GMT -6. The time now is 02:29 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.