I was looking around and it helped me alittle bit but not to much. I have the stock Goodyear Wranger AT/S still on my truck but I'm looking to upgrade my tires. The size I have now is 275/65 R18. If I went with Nitto Terra Grapplers would this size fit without a problem, 285/60 R18. What is really the difference in the size of these tires. I know the numbers are alittle different but in what way does that change the tire.


James

 

go to googleand search "tire sizes" there will benumerous sites that allow you to put in tire info and it will give u exact width and height info
31.5 inches tall for the 285/60. 32 inches tall for the 275/65

 

the 285 60's are going to be a little wider but a little shorter than the stock tires.

Stock : 32.07 x 10.82
285/60: 31.46 x 11.22

the first number is the width of the tire in mm and the second number is the aspect ratio (a % of the first number to determine sidewall height of tire) i.e. 285 x .60 = 171...

 

Here's a couple sites I use to compute tire sizes

http://www.1010tires.com/TireSizeCalculator.asp

http://www.discounttire.com/dtcs/infoTireMath.dos

 

Or go here and there is a fitment guide as well http://www.bigcustomwheels.com