I'm still nervous about wheel size. I need to be able to load up a 1-1/4" Varsity tire, then a 2.35" mountain bike tire. Or even a 4" fatbike tire! That means that if I design for the 4", the Varsity will be loose, and if I design for the Varsity, I won't be able to fit the fatbike.
It would seem that an adjustable width wheel chock would add considerably more weight than a normal wheel chock... that is, IF I can figure out how to do it well.
I guess there is a chance I could bungee the Varsity to one side, wedging it against one side. But how well will that work?
Maybe I need to have a V-shaped channel in the bottom of the trailer, so it fits and centers all tire sizes, and just mess around with ratchet straps on each side of the stem to keep it in place. I've done something similar in my truck... and I guess it's not much more work than my current setup: pull a wheel off, adjust the axle block, mount the fork, tighten the axle block, then bungee everything down.