Sturmey Archer X-RF8 with 250W Motor
I have an Electra Amsterdam Dutch-style city bike (700x38c wheels) with a Nexus Inter-3 hub on the rear and a 250W motor on the front wheel. The 250W motor is able to get my bike up to about 15 or 16mph on its own. To ease the load, I pedal along with it, but the highest gear on the Nexus 3 feels too low. The bicycle accelerates quickly but the top speed feels limited.
I've been thinking about getting the Sturmey Archer X-RF8 hub (talked about here http://www.bikeforums.net/bicycle-me...r-8-speed.html) but I'm wondering if the direct drive gear being the lowest one would be too high, even with the motor. What's the smallest sprocket/largest chainring combo available for this hub? I don't mind compromising a bit of acceleration as long as I can get a higher top speed (since the 250W motor cruises at its highest speed) but I don't want the bicycle to feel like an immobile tank either.