Again, thanks Gordon for the detailed reply.

No need to worry about the crowbar ! I worked in a cycle shop once upon a time and, in the intervening years, have managed to assemble a collection of specialized shop tools, including, believe it or nor, a fork truing jig and the truing lever itself. The jig holds the fork and the attached gauges allows the user to confirm that the two blades are being trued or cold-set in a symmetrical manner.

Although I would love to have roller brake-equipped wheels on the Boardwalk as soon as possible, realistically speaking, it may be several weeks before things come together.

I will start by measuring the Boardwalk's fork in its current state so that I can determine that the Nexus/Nexave roller brake hub would fit if the fork were cold-set to 100 mm. That's not a given, but I am optimistic that it will fit. The trick will be to line up the brake counterforce arm with the fork blade in such a way that the arm parallels the blade without hitting it.

If it looks feasible, I will order a pair of rims and build the roller brake-equipped wheels. Only then will I put the fork in the jig ...

Thanks for your advice regarding the Big Apple tires. I have nominal 1.75 in. (but somewhat narrow) Haro tires on the Boardwalk, and there is a fair amount of clearance under the mud guards. It makes me think that the Big Apples might fit, albeit closely (it could be that the Helios, a faster bike, is designed with less clearance). I may put this question to J. Gaerlan, a Dahon (and other bike) expert who maintains a shop in California, as I will be purchasing the rims from him.

However, if I stick with the original Dahon fork (cold-set to 100 mm), I might not need the wider tires. The wide tire idea grew out of my earlier plan to replace the Dahon fork with a rigid BMX fork.

Thanks again,

Tony