Sorry for taking this off topic, but you can use the vbulletin code tags to pretty up that chart.
Code:
Tire Size Comparison
Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
245/75-16 7.2in 15.2in 30.5in 95.7in 662 0.0%
215/85-16 7.2in 15.2in 30.4in 95.5in 664 -0.3%
Click the QUOTE button to see how it works.