Jump to content

Recommended Posts

The attached spreadsheet is set up so that anyone can enter a tire size and get the approximate diameter, widths, and recommended rim width.  Axle ratios can also be entered and the engine RPM at 60mph is shown, based on the tire size. The engine RPM can also be entered to check speeds, based on axle ratios and tire sizes.  The second tab shows gear ratios of various Ford transmissions.

NOTE: Added a tab for wheel and tire clearance calculations  5/7/19, corrections on 12/8/2020 and added a table of axle widths.

Because changing tire diameters will affect speedometer accuracy you can find information and a speedometer gear calculator here:

https://www.7173mustangs.com/thread-speedometer-gears?pid=163384#pid163384

Tire Sizes-v6.xlsx

Tire Sizes-v6.xls

Edited by Don C

 

 

“If you can't explain it simply, you don't understand it well enough.”

--Albert Einstein

 

Link to comment
Share on other sites

  • 3 years later...

Thank you guys for all the inputs! :D I have decided to go with the 3.50 gears, as long as the pinion was 28 splines. He was unsure and going to check today.

1972 Mercury Cougar XR-7 2dr hardtop

Link to comment
Share on other sites

  • 2 years later...

I added a tab to the spreadsheet (Clearances) that will make it easy to calculate the distances between the inside and outside edges of the rims and tires for measuring and estimating the clearances from springs, fenders, etc.

 

 

“If you can't explain it simply, you don't understand it well enough.”

--Albert Einstein

 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...