I was looking at The Clymb yesterday, too. Since I couldn't find very much useful info on the website - and because kilowattbikes.com & theclymb.com had some apparently conflicting data, I called kilowatt bikes this morning and spoke to Richard. He seems to be the man with all of the information. I am specifically interested in the commuter 700c and this is what I learned:

The company has switched to the Bionix system because it is selling a lot of bikes for municipal use and they spec'd rear-wheel drive. The bike on theclymb.com is a protanium front drive system that has been in use in Europe for a while. It is in fact the 250 watt/29V system listed in the "Details" box of the clymb's description, not the 350/36 listed on the kilowatt bikes website. However, he did say that they will continue to support the protanium system in the future, so warranty support/maintenance is not expected to be an issue.

Richard said 18-20 mph is as much as you can get out of the system - if you exceed 20 mph, the motor stops helping. He said it was designed this way because 20 mph is the limit for most US bike lanes.

If anyone has additional concerns or suggestions, I'd like to hear them.

There is not a lot of info about these bikes on the web, but here is the contact info I found if you have more questions:

3 3 6 L e w i s S t r e e t # 3
K e t c h u m , I D 8 3 3 4 0
p : ( 2 0 8 ) 7 2 5 - 4 0 0 0
f : ( 2 0 8 ) 7 2 5 - 4 0 0 2

e m a i l : s a l e s @ k i l o w a t t b i k e s . c o m