Our8thGens

http://www.tacomaworld.com/forum/tirecalc.php
Good A to B comparison of setups to assess speedo/diameter impacts.

http://www.tyrestretch.com/
Photo database of different tire/wheel/brand permutations... Listed as wheelwidth_tirewidth_tireprofile_tirediameter with sometimes supplemental information added (such as tire brand).

whoa, i just play around with the site, and I'm loving it!!!

I used this when I compared how different a potential new setup would compare to the current.

http://www.willtheyfit.com/

^+1 ....

DJ Rafattack wrote:I used this when I compared how different a potential new setup would compare to the current.

http://www.willtheyfit.com/

exactly what i used when i was figuring out the specs on the new wheels

I personally like this 1010 Tires' calculator because it lets you compare up to four tires to your stock size: http://www.1010tires.com/Tools/Tire-Size-Calculator

I use their wheel offset calculator all the time too: http://www.1010tires.com/Tools/Wheel-Offset-Calculator

This is another good calculator that factors in camber: http://www.fitmywheels.com/