I have a 2000 400EX and I think I'm going to buy a new set of Razr's for on it. This is kinda a dumb question but I'm not sure what they mean by 4 ply and 6 ply, what is the difference. I do alot of woods trail riding and some drag racing, which would suit me the best?

 

It means the thickness. 6 ply is the thickess u can go. it is also the heaviest u kind of tire. i would go with the 4-plys