Looking for a calculator where I can plug in my tire size and it will give me all the options of what'll fit without the overall tire/wheel diameter changing...

 

tirerack.com

It's always helped me. It may not give you dimentions, but it will tell you what is available for your vehicle.

 

A tire calculator! ??? I don't ever remember having seen one. That would be quite nice!

You can get the information you need at TireRack.com - but it isn't quite as simple/direct as a calculator would be!

 

http://www.miata.net/garage/tirecalc.html

 

>>http://www.miata.net/garage/tirecalc.html

Now that's what I call a nice applet!! WhooHooo!

I have a 2k2 Dodge Neon S who's tires are fairly worn. I go to the tire rack site and that don't list the Neon S model, they have ES and SE, but no S. All the Neons listed showed different stock tires than what was on my car. 175/70r14's They have a circumference = 74.3". So by using that calculator, I was able to determine the best fit of a wider tire is going to be 205/60r14 measuring in at c=74.4" or wider yet the 225/55r14's at c=74.6". However, I don't know what will fit the rim that's on the car. I guess that's the hard part...

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I have a spreadsheet that has data for practically all tire sizes. Among other things, you can key in a prospective tire size, and it will display sizes that are close (+-1%, +-2%, +-3%) with a clickable link to tirerack. Lots more really geeky stuff.

 

This one compares 4 at once (plus the stock size): http://www.1010tires.com/TireSizeCalculator.asp

 

Here is another good one, with wheel information too:

http://gs.tolan-hoechst.com/tirecalc.htm

 

Here's te best:

http://www.mini2.com/forum/faq.php?f...hoosing_wheels