I have a late-model Boardwalk that I would like to convert to hub brakes (not disc brakes) for 4-season commuting.

Prior to purchasing this Boardwalk, I had been using hub brakes (i.e., drum, roller, and disc) exclusively for a few years on various commuter bikes. When the summer drought finally broke in mid-October, and I found myself commuting in the rain on my "V-brake" equipped Boardwalk, I rediscovered the limitations of rim caliper brakes and began thinking of how to mount roller brake-equipped wheels on the Boardwalk.

For those who don't know, "roller brakes" are a cable-operated hub brake manufactured by Shimano for use with its Nexus and Nexave lines of hubs. While they are a bit heavy, I have found them to be an excellent brake for everyday, all-weather commuting (low cost, low risk of theft, low maintenace, quiet, very reliable).

The catch is that the Nexus/Nexave front hub is of a standard, 100 mm OLN design and the Dahon fork uses the narrower 74 mm OLN dimension.

I'm not a big fan of the straight fork on the Boardwalk and would be happy to replace it with a traditional curved fork. Specifically, I would need a 20 in. curved fork with:

- 100 mm drop out width
- 1 1/8 in. threaded steerer tube (for use with threaded Dahon headset & 1 1/8 in. handlepost)

Ideally, the fork would be ChroMoly and would not have cantilever studs, but I'm not picky on these two points.

Does anyone know where to order such a fork? I have seen lots of threadless 1 1/8 in. forks and a couple of threaded 1 in. forks, but have not seen any threaded 1 1/8 in. forks.

As an alternative, does anyone have any experience converting a Dahon to a threadless fork and headset? If so, how do you keep the headset adjusted properly? Does it work well with the handlepost?

Any ideas would be appreciated. Thanks.