Originally Posted by Ozonation

Before I got my Brompton, I test rode a regular 6 speed and a regular 3 speed. Fortunately, the bike shop was located near a road that ran for fair distance at a reasonably steep grade up a hill. The 3 speed was frankly too limiting gear range wise. The 6 speed was better - fairly manageable up the hill.

When I finally bought my Brompton, I ended up going with a different shop because they had one available in the configuration I wanted and they recommended the 6 speed reduced range. I asked why? They found through experience that while you might miss the high end for the occasional speed, I would benefit much more from the lower end for hills, wind, packed sidewalks, etc.

He was right. I use the lower ranges much more frequently that I would the higher range. If you're going to be riding around foothills, you want climbing potential more than anything. Furthermore, you'll find the Brompton will be used in many more grab-and-go situations where practicality will trump speed: it's just too fun and convenient to ride.

So, if you have the option, I'd go for the reduced 6 speed version.