i have 29.5 laws on mine 12 in back and 10 in front with just a pipe and jet kit look at how thick the mud is in my avatar and its still turnin em, it does good in muddy water and semi thick mud but in real thick peanut butter it starts to bog but the tires never stop turnin, my freind also has a 450 with pipe and jet kit on 28 laws and itll turn them in anything