Tom Voorhees

MV-QSX8000 (DPX) is a modification of the MV-DPX from Wuxi Sachi Motors

Flywheel newsletter takes a very specific, but fascinating, look at the used e-bike market as a way to track trends, notes that cargo bikes represent a small percentage of used e-bikes sold last year. He predicts this will change. Why? Because they are ridden the most, by far, of any e-bike category.

Voltage Sag - What is it and how does it effect ebike/meta bike performance. Voltage sag is a term used for the result of loading a battery to its full discharge ability and the resulting drop in nominal voltage the battery can sustain. For example in ebikes, in general terms if running a 36 volt battery using standard 18650 cells will have a full charge of 42 volts.  As you ride the battery drains of electrical energy and the voltage drops to a cut off point for the cells usually around 33 volts to 29 volts. This produces an experience for a user of an average voltage above 36 volts. The unfortunate result of course, is that when you start your ride at 42 volts you will experience voltage going down until you stop your ride. This means the top speed and power at the beginning of the ride is much better than at the end. When nearing this cutoff point you will experience a power drop off, loosing climbing ability, speed at full load, and generally degrading performance. The perfo...