BBS02 48V with controller 36V. More or less efficient?

[wsurfer]

Hi Guys,
In an Italian forum they suggest to order to the BBS02 48V with a controller 36V in order to lower the RPM to 90 and increase efficiency.
What do you think? Is that so?

 

[speedmd]

Would make sense to run the motor higher in the rpm range and still allow rider to assist without spinning the legs too fast. I can see it helping drop battery usage quite a bit sharing more with the rider this way. Interesting way to improve range for lower speed use.

 

[gunthn]

BBS01 is much more pleasant to ride and pedal. 02 spins too fast at higher power to pedal with. I think it was designed/geared for 36v originally. I am sure someone knows/remembers the first BBS series. I think they were 36v.

Gunther

 

[nioko]

I'm running my BBS02 on 12S li-ion, charged to 4.1v/cell - this suits my cadence pretty well. Low Voltage cut is a bit early on 12s, but acceptable (you need to configure it to the loweset setting - don't remember).