well, if you're looking at tires for 18" wheels, then its either for a big heavy truck where the bigger the better makes sense, or for the stock rims on a jk. and since this is a jeep forum im gonna go with the jk. the trail grapplers have had good reviews from the mags and from those that use them. but they are heavy due to the 8 or 10 ply design. so if these are going on a jk, then id go with the cheaper and slightly smaller tire. due to it is a little narrower and will fit the rim width better, little bit lighter and its cheaper. thats my thoughts on it. if this is the tire you'll use.