Chas, I have a couple questions...

I'm thinking of doing a similar build to speed up my 12 mile commute. I'm in a similar position...reasonably strong rider, cruise in the 15-20mph range on a normal road bike/commuter. Zero hills where I'm at...with the exception of a few small overpasses that I don't mind using leg power to power over.

Can you elaborate on the differences between the 24v 201rpm@36v motor VS the 36v 328rpm motor at 36v?

Lastly...what can you tell me about the Q100H motor? Is it possible the new Q100H at 260rpm would now be better than both the above options for this application?

Thanks in advance

edit: I should probably add I will be running 700c wheels with fast rolling largeish tires...likely 32-38mm.