Welcome to the North American Subaru Impreza Owners Club Tuesday July 25, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Click here to visit TireRack
Brakes & Suspension Forum sponsored by The Tire Rack

Losing traction? Need new tires?
Click here to visit the NASIOC Upgrade Garage...
Go Back   NASIOC > NASIOC Technical > Brakes, Steering & Suspension

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 02-05-2002, 10:50 AM   #1
daytontp
Scooby Newbie
 
Member#: 9797
Join Date: Aug 2001
Location: South Carolina
Vehicle:
2005 Honda S2000
New Formula Red

Default Tire Fitment Calculator

NOTE: YOU WILL NEED WINZIP TO UNPACK THIS FILE, AND MS EXCEL TO LOOK AT THIS FILE.

A friend of mine found this the other day. It is a spreadsheet that calculates every aspect of change that can occur from a tire and/or wheel change on a car. Like ride height, speedometer changes, offset, etc... Everything is computed on the fly, as you change the values at the top. I zipped it so I could attach it to this forum post. The original file is ~38KB and the zipped version is ~10KB. If anyone knows if I can attach the *.xls version (original), please let me know.

Have fun, also, let me know if you have questions about how to use this.
* Registered users of the site do not see these ads.
daytontp is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 02-05-2002, 04:51 PM   #2
daytontp
Scooby Newbie
 
Member#: 9797
Join Date: Aug 2001
Location: South Carolina
Vehicle:
2005 Honda S2000
New Formula Red

Default

I case you are curious, this is what you enter into the spreadsheet. You can set the Original and Proposed Fitments to what ever you want.

Original Tire Fitment:
Width, Aspect Ratio, Wheel Diameter & Offset
(i.e. 205, 55, 16 & 55MM)

Proposed Tire Fitment:
Width, Aspect Ratio, Wheel Diameter & Offset
(i.e. 215, 45, 17 & 48MM)

And this is what the spreadsheet tells you:
1. +1 inch wheel potential fit.
2. +2 inch wheel potential fit.
3. +3 inch wheel potential fit.
4. Change in ride height.
5. Inward additional width required.
6. Outward additional width required.
7. Original tire height.
8. Proposed tire height.
9. Additional total tire height.
10. Additional vertical clearance required.
11. Additional rolling diameter.
12. Change in drive ratio.
13. Speedometer reading >> to >> actual speed.
14. Desired speed >> to >> speedometer reading required for this speed.
15. As well as a graph that shows what the proposed tire would look like in relation to the original tire. An outline with each tire on top of the other with the mounting surface as a reference point. Helps in seeing if you need a spacer or not.
daytontp is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Awesome tire size calculator with lots of info spt_impreza Brakes, Steering & Suspension 0 09-12-2002 12:43 AM
Need Tire conversion calculator. Dolphin Overton Brakes, Steering & Suspension 5 04-08-2002 05:27 PM
tire/wheel calculator question Ken Levin Brakes, Steering & Suspension 2 03-16-2002 09:43 PM
Attn: Autocrossers - Tire Pressure Calculator Opie Motorsports 10 04-04-2001 07:45 AM
Tire Size Calculator stever General Forum Archive 5 01-05-2001 06:22 AM

All times are GMT -4. The time now is 01:30 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.