Originally Posted by
fly135
The Bosch mid drive is my mountain bike and I usually ride it in EMTB mode. Which scales the percentage of motor input to rider input based on how hard the rider pedals. This gives a very natural feel to the motor. IOW you don't feel it kicking in. It just feels like you are stronger. The other modes like ECO, TOUR, and TURBO add a fixed percentage based on how hard you pedal. Versus the EMTB mode that scales that percentage.
I have the Bosch Performance Line CX drive unit on my commuter bike, and I tried out the EMTB mode to see what it was like. It was interesting and I can definitely see how it would be great for technical trail riding! Unfortunately the reason I myself need the e-assist is usually that I have pedaled partway up a hill and my legs have given out, so I don't *have* the extra oomph needed to get the EMTB mode to give me more power... so that lasted about a week and I put it back into the fixed-percentage assist.