Originally Posted by
chagzuki
I use inline skate wheels on the frame section and brompton easy wheels on the rack. The skate wheels, with dual bearings in each, don't shimmy under load and therefore work way better for using the bike in cart mode. However, they weight a lot more and for this reason I cut about a third off the width. I think they're 80mm in diameter... certainly anything larger than that would be a bit unwieldy.
That's worth looking into then. I was thinking of those kinds of wheels but wondering if they would give the elevation I'm looking for. I will check it out. I'm was very concerned that whatever I use will impede the ability to fold the bike properly. Since they work well on your bike I shouldn't be concerned then.