so your saying with my 31s my spedo is off by 5mph? the stock tire size on the door is 235/75/15

never heard of that brand but they look nice i had to buy a brand i never heard of to replace my blown tire its not to bad I plan o replacing all my tires before winter with some Bfg all terrains or mud terrains still not sure if the mud terrains are good in snow

 

Well I think these are all seasons. At least that is what I think A/S would stand for. The tread has some siping or snow use, but not much.

http://www.off-road-outdoors.com/tire-siping.html

 

a/s i think stands for all season like a/t means all terrain.

ive seen the tire spipng before id do it to my tires now but there are close to state min LOL