i run the 37x12.50x15 radial iroks lovem, i dont like the bais they like said before ballon out to much. i have run 36x13.5x15 rads before, but i like my 12.50's better. me and Big B ( he runs 36x13.50x15 radials iroks) ran in the snow yesturday, up sky ranch and did not air down went past all snowmobile tracks and was making our own tracks and never got stuck nor did we have to air down, one of the best times up in the snow, if you any amount of driving on pavement go with radials. if its a trailer queen then go bais. big thing to remember is you dont have to put alot of air in them for the street. i normally run somewhere between 20-25 psi for the street. thats where we were at yestuday in the snow. knee deep white stuff.