Reading the Derby Cycle press release of the Impulse Evo release is, I think, interesting:
http://www.derby-cycle.com/en/press/press-releases-brands/single-view/view/always-one-idea-ahead-with-kalkhoff-almost-everything-is-new-1.html
===== some abstracts ==============
More powerful, quieter, more durable: the new Impulse Evo drive
Thanks to a supplementary cadence sensor, the Impulse Evo assists the rider even more smoothly. All the components of the Impulse Evo motor are designed with durability in mind: the gear unit has been reinforced, the new deflection shaft and the new drawn-cup roller clutch are even sturdier, and the innovative multi-tooth axle ensures a secure crank assembly.
================================
The vocabulary used indicates a lot of work/focus on durability/reliability... as if the previous version (Impulse 2) needed some work.
http://www.derby-cycle.com/en/press/press-releases-brands/single-view/view/always-one-idea-ahead-with-kalkhoff-almost-everything-is-new-1.html
===== some abstracts ==============
More powerful, quieter, more durable: the new Impulse Evo drive
Thanks to a supplementary cadence sensor, the Impulse Evo assists the rider even more smoothly. All the components of the Impulse Evo motor are designed with durability in mind: the gear unit has been reinforced, the new deflection shaft and the new drawn-cup roller clutch are even sturdier, and the innovative multi-tooth axle ensures a secure crank assembly.
================================
The vocabulary used indicates a lot of work/focus on durability/reliability... as if the previous version (Impulse 2) needed some work.
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