In short, the answer is yes, a Stromer ST2 can take on mountains. On a test ride through the Santa Cruz mountains, I covered some 30 miles with an elevation gain of 3,761 ft. About half of the ride was in the highest assist mode and half in the second highest assist mode. Overheating occurred only twice, though diminishment of pedal assist was only minimal. Maintaining a steady cadence kept things in check (see post on temperature management here).
On the first leg of the test, I achieved an average speed of 23.7 mph, which included a two-mile downhill section and about six miles of a steady incline. See Strava data below:
On the second leg of the test (see Strava data at the very top of the post), I achieved an average speed of 20.1 mph, which included several inclines and declines. I finished that leg with 5 percent of power remaining, starting with a fully charged battery.
My range could have been increased had I ridden the entire journey in the middle assist mode.
© 2017, Mark R. Adams. All rights reserved.