OK. I forgot about that fix. Can you get a small enough chainring on the middle of the triple spider? I am using a "pounder" crank arm (double) on my Pug. It has two small inner chainrings and a bash guard where the outer ring would be on a triple. In deep dry sand, you are going to need some teeny gear choices up front.

Remember, the tall tires (virtual 29er) simulates taller gearing already. To overcome the tall tires, you need even smaller gearing. In other words, one tire rotation moves you farther down the path with a Pugsley by several inches as compared to a standard 26" ATB tire while using the exact same gear combo. Even with only two small chainrings, I can ramp my Pug up to 20ph before running out of gearing on the tall end of the range. My lowest gear is well lower than 1:1

These types of bikes will get you into areas where other bikes cannot go. If you take advantage of this capability, you will find yourself happily riding terrain with NO TRAIL because no one else can bike, sometimes even walk, in those areas. My point: You gonna need some really low gearing or you gonna be pushing/carrying more than riding. Just make certain that the Surly fix accommodates the gearing you must have. I just don't know those details.

I stick by my advice. If the Moonlander actually works with the gearing you NEED - bigger is always better on dry sand. No question.