I stumbled across this in my search for wheel and tire size compensation specs. You just enter the starting or stock wheel and tire size, and enter up to four more sizes you are considering and it calculates diameter and width differences, as well as a speedometer correction number . Great link. I've also added their link for backspacing specs, in case you change wheel sizing/ backspacing.
www.1010tires.com/TireSizeCalculator.asp
www.1010tires.com/WheelOffsetCalculator.asp

These should be part of a tire plus sizing sticky!

 

Hell of a tool , Thanks !

 

YES! Keep talking this thing up as a sticky, I suggested it to Alex a while ago and he agreed, but I haven't seen the sticky yet.

mb

 

links dont work for me :(

 

links didn't work for me either...

 

Try this one.
http://www.1010tires.com/TireSizeCal...?action=submit
I have had this in my bookmarks for awhile now. It is good info.

 

Sorry about the links; I didn't delete some things in the links when I copied and pasted. They should be fixed now!

 

works now.. thanks!