Electric bikes lack the traditional aural response of internal-combustion engines, such as the change in rpm that occurs with on-throttle wheelspin. I had to overcome this when pushing to the edge of traction on the Brammos that I've raced. On the other hand, feel for the road is unparalleled. Also, the controls deliver more direct feedback; even the jangling of floating brake rotors can be heard. Overall, the effect is greatly enhanced concentration on lines, braking points and the like, which means ICE racers may have to develop eyes in the back of their heads.