We list a top speed of 28 mph and a range of up to 50 miles on a single charge.
We have hit these numbers in our testing, and stand by them as realistic figures. But in truth, it's not possible to guarantee a speed or range for all people riding in all conditions.
Actual speed and range will be affected by variables such as rider weight, use of throttle vs. pedal assist, pedaling effort, road/weather conditions, incline, tire pressure, etc.
If you're interested in trying to maximize your Flash's range, the key is to find a pedal assist level that is efficient for your style of riding. Using the throttle–while perfect for a quick hit of speed on the road–will deplete your battery power more quickly.
In terms of speed, downhill is usually the fastest!