I owned a Moulton APB for a few years. It was fine for gravel roads. Single track MTB routes, I would not do it. The shocks were best on some of the pot holed roads found in New Orleans. Before that I had a Moulton Standard, 16--349 wheels. Eventually I found that for myself, shocks on folders not worth while. They do have their place. There are roads that are made more comfortable, thus ridden faste, by shocks. But that is far from all roads. And then there are roads where the energy losses from shocks are just not worth it. I know both of the Moultans I owned were cheap as Moulton's go, but I think the shocks were good enough to make comparison. I like the shock on the Bromptons but it is very light and and only allows for horizontal movement. I have not had 16-inch folder that did not have shocks.