picking the right axle specs: bracket

[lowimpacttravel1]

I am getting ready to order the axle for my 5X10' trailer to carry my future Teardrop camper. It's a lot of money and variables. I'm going through the list of options on the Dexter axle order form and can't decide on the mounting bracket height. There is Low , 1" high, and 3" high. I am ordering an axle 22.5degrees down and plan to run on 15" tires. I would think that puts the trailer high enough for a good road clearance. Is there any reason I wouldn't just select the low mounting bracket option?