Felt
You own a Felt BrüHaul electric longtail cargo bike, and you want a Rolling Jackass for it.
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.
Release 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 release options: friction shifter, standard lever, or large clamp lever.