Here are a few of the things I've learned through my own experience over the years
The larger size will easily handle fish to 35 pounds, and quite frankly, anything larger than that you should try and unhook in the water, revive, then release right there
5+1 bearing system for smooth retrieves Lightweight A-Sym body with graphite frame and sideplates MagTrax braking system for consistent casting control Power Disk drag system with 15 lbs max drag Duragear brass gear for strength and longevity 90mm aluminum handle with co-molded soft touch knobs Gear ratio 6.8:1 SEE LESS
Fully adjustable torso (15-19 in.), hipbelt, and load lifters allow for a dialed-in fit and easy sharing between partners
Also, if its too thin, uh, if you have the same strength as maxima, you could get problems