Interesting how you converted the stem on your fat bike, and I didn't know it was possible (probably not with some/most systems). That eliminates my major problem with these bikes since I dislike the "rickety" feeling of the steering. I have an older Dahon (circa 1984, it was procured recently for a very reasonable price) and need to tighten the steering every couple of rides. Going to check to see if this modification is possible.