Surly
You own a Surly Big Dummy, Big Fat Dummy, or Big Easy, and you want a Rolling Jackass for it.
Note that the Big Easy RJ installs through the front lateral cross tube, so it is not compatible with other products that install in that tube such as Xtracycle WideLoaders or Footsies.
Installation instructions:
Big Dummy
Big Fat Dummy
Big Easy
Feet Options
You have two styles of feet to choose from: all stainless steel, and polyurethane feet on stainless threads (+$14). The all stainless steel is the ultimate in rugged durability and stability while the polyurethane will grip hard smooth surfaces where the stainless might slip and scratch.
Lever Options
The standard lever works for most people, clamping to the standard 7/8” (22.2mm) handlebar size. The large lever (+$20) has a 1-1/4” (31.8mm) clamp for getting up close to the stem on already crowded handlebars. The friction shifter lever can also help with crowded handlebars because the malleable clamp can more easily fit over curved sections.
Two feet options: all stainless steel or polyurethane.
Three lever options: friction shifter, standard lever, or large clamp lever.