I cant make up my mind. For sure im going with 27's but ive heard the Outlaws are VERY hard on bikes and ride very rough. They wear down the bike big time, but they pull like no other. I guess theyre a STRICTLY mud tire. The Vamps ive heard are lighter than Outlaws and pull just as good and are not as hard in the mud. I do ride trails to get to the mud and they're more like mud holes. Im just scared of getting stuck with 589 caliber tires again. THe 589's are great, just not for the mud. What do you all think?