For our speed test, I rode the Discover 2 on a flat route that is part of our local bike path network. I tested the bike in each of the 5 Pedal Assist System (PAS) settings in Trail mode to determine its top speeds. I did one test with a speed limit of 20 mph (Class 2) and a second with a speed limit of 28 mph (Class 3).
As a basis, I started the test with PAS deactivated. The bike was relatively comfortable to ride without pedal assistance, but the weight was noticeable; I reached 11.8 miles per hour using only my own power.
In Class 2 mode, my top speeds with pedal assist were 13.7 mph in PAS 1, 14.6 mph in PAS 2, 17.2 mph in PAS 3, 21 mph in PAS 4 and 20 .3 mph in PAS 5. I measured noticeable speed differences throughout the test in Class 3 mode; The bike was faster across the board. I reached 14.9 mph in PAS 1, 15.6 mph in PAS 2, 20.6 mph in PAS 3, 23 mph in PAS 4, and 28.3 mph in PAS 5.
The Discover 2’s 750W rear hub motor uses a torque sensor that allows it to be adjusted based on the rider’s effort. Therefore, the bike behaves slightly differently for everyone who rides it. I did my best to stay consistent while pedaling and eliminate outside variables that could affect speed.
In addition, the bike’s speeds vary to some extent with two other riding modes (Eco and Boost). With lower power, Eco mode would probably allow lower speeds and slower acceleration. In Boost mode, the bike accelerates faster, but the top speed limits are the same.
In general, the results of the Discover 2 show a significant increase in performance and speed in both tests. Looking at the graphs of our data from the Class 2 and Class 3 trail mode tests, the pattern of speed/power distribution appears somewhat irregular, but in practice the bike felt smoother than these results suggest. However, some anomalies were noticed. The performance levels in PAS 1 and 2 felt similar in both tests, with minimal differences between them. Furthermore, scores on PAS 4 and 5 differed greatly in each test; In Class 2 mode, PAS 4 and 5 both hit the 20 mph limit (not uncommon on bikes with class adjustability), but in Class 3 mode there was a noticeable jump in speed between them.
Some of the bike’s more unusual behaviors can be attributed to its programming, but others are likely due to its torque sensor. In order to achieve consistent engine performance, I had to concentrate on pedaling extremely smoothly. This experience wasn’t quite as intuitive and responsive as I would have liked, but with more time on the bike it probably would have clicked. Despite this unusual aspect, the Discover 2’s torque sensor was still a big step forward over a cadence sensor – and a big step forward for Velotric.
I also noticed from the power meter on the display that the engine power seemed to fluctuate in the low to mid range of its full power unless hard, consistent pressure was applied. This had the advantage of feeling restrained and natural most of the time (like an analog bike), which increased motor efficiency (see the “Range Test” section of this Velotric Discover 2 review below).
Although the bike was generally understated, it had a powerful feel when I was working on it. Driving at 28mph in boost mode was an absolute blast. But with such a wide range of speeds and power levels, I think most riders will find a way to tailor the bike’s handling to their personal preferences.
Finally, as far as the throttle is concerned, its acceleration was reserved when starting off, but then built up steadily. Throttle speeds can be tied to the limits of the PAS, allowing for easy control without modulation. I expected the throttle acceleration to be quicker due to the wattage of the motor, but the bike should have greater mass appeal as the speed gradually increases.
