The mud graps are just plain sick. Before I gote my 37s I originally had 35" Mud Graps. They had the best reviews by just about everyone. I had alot of time in Iraq so I checked out chevy forums, Hepp forums and FORD forums and most everyone had great things to say about them. They are pricey, I think I pd $330 ea after Military Discount. The Mgr told me the 18" rim I bought would fit, well it didn't and rubbed the shocks. Thats where I learned about backspace real quick! So the tire store had to take them back even after they were mounted. They gave me a full refund, but I went back to them in coming weeks. I eventually got newer 17" rims and went back to buy the Mud Graps but dayum they were like $355 ea!!!!! YIKES!!! So I asked about my second best tire (really my back-up plan) and it was the KM2s. For a 35" it was around $285, so I was lie ok.... what about the 37" KM2 and he said $300 plus mounting and balance. So I went with the 37" KM2s. The balancing was around 2-3 oz per tire, but the guys at the tire store said the Mud Graps were better on balancing that the KM2s. I said "la lalala la la la (loud)......" as I was walking away! You wont be disappointed at all. Get the Road Hazard insurance on them though, as u would with any expensive tire if they will give it to you.