5. ) The ST2s has unprecedented control, letting you fine-tune several parameters to
your own individual preferences via the touch screen and app.
6. ) Eleven gears, no waiting! Mated with the Syno-Drive hub, you’ll find a gear for every
type of riding.
7. ) We love that a Rosenberger plug is standard on the Stromer.
8. ) Magura two-finger levers are small and out of the way. Power control is next to that.
accelerate off stoplights and keep a
constant 20-something pace. With
this you need added caution and a
fair amount of bike-handling skills,
as the speeds this thing likes are
both intoxicating and require good
anticipation for other bikes, cars and
pedestrians. Even at a higher speed, the
motor is very quiet.
The Shimano XTR Di2 shift system
is fully electronic. It’s a different type of
shifter that offers incredibly smooth and
quick shifts. There’s an added clutch in
the rear derailleur that keeps tension in
the chain and keeps the ride smooth.
It’s a bit of a change when you’re used
to a mechanical shifter, but that only
takes a little effort to get used to. We
did find that the touchpad interface for it
was quite, well, touchy and shifted if you
brushed against it on accident.
Once you get used to that, it’s
extremely smooth, and when paired to
the 11-speed, 11-40 tooth cassette, it
gives you all the gearing you’ll need.
Being electronic, you do need to charge
the system every once in a while.
Interestingly, there’s a USB charge port
hidden in the head tube by a weather-sealed cover, which can be used for
charging the Di2 or even your phone.
We flattened some of the steepest
hills in the area, all above 20 mph. It
makes that effortless. A long ride down
the beach path, even with a headwind,
was exhilarating. The Fizik saddle
wasn’t the most comfortable thing for
a long ride, but a proper pair of cycling
shorts made a big difference. Aluminum
frames and carbon forks don’t offer any
damping for bumps, and we had sore
wrists and butts from all the bumps and
potholes along the way. A suspension
post might be nice for longer rides, and
there is a suspension fork available as
The bike feels solid, planted and
does give you the confidence to
go faster when you want to. The
Continental Top Contact II 26x2.0 tires
grabbed even the sand-covered beach
path and never slid even a little. The
combination of the bike’s handling, the
tires and the brakes were so solid that
we found ourselves using just the rear
brake most of the time, and with one
The 48-volt battery is 20 percent
larger than the ST2 version. It is nearly
a full kilowatt at 983 watt-hours, and
Stromer claims that under the right
riding conditions, it can go 110 miles.
We’re guessing that must be at level one
with a 110-pound rider on flat ground,
since we dumped a battery from 95
to 7 percent in one 40-mile ride with a
rider who is well north of 110 pounds
and was riding in level two and three
over hills and often as close to 28
mph. When riding at speeds over 28
mph there’s an obvious drop in power,
because at that point, it’s all you. But,
28 mph is faster than most people will
want to ride, anyway. It’s nicer to simply
cruise through areas and enjoy the
We always like to ride our test bikes
with the power switched off to see how
they ride as a regular bike. The ST2 S
rides like a really well-made bicycle. At
57 pounds, sure, it’s heavy, and you can
feel it with each pedal stroke, but it’s a
solid ride. Turn the electrics on and you
don’t notice the weight, as the power is
set up perfectly for it. The components
are well chosen and perfectly matched.
Stromer’s new flagship bike is
impressive. This bike isn’t for everyone.
It’s a bike for someone who has the
money (it would look nice in the garage
parked between a Porsche and a Range
Rover) and really appreciates quality
craftsmanship and high performance.
It’s not a race bike and it’s not a
mountain bike. It’s an amazing touring
bike, allowing you to go at your own
pace and enjoy the views, not worrying
about the effort of getting there. As a
commuter, you could easily get to your
job 20 miles away in under an hour
without sweating, and not have to worry
about having a charger at work. In short,
it’s one of the best bikes we’ve ridden,
and that says a lot. ■
Motor: SYNO Drive motor, 500W
Battery: 983 Wh
Charge time: 5–6 hours
Top speed: 28 mph (with assist)
Range: Up to 100 miles
Drive: Shimano XTR Di2 11-speed
Brakes: Magura MT2 Next e/MT5
Controls: Built-in LCD
Fork: Stromer ST2 carbon
Frame: Stromer ST2, aluminum
Weight: 57. 9 lb.
Colors: Anodized Gray
SPECS: STROMER ST2 S
“We flattened some of the steepest hills in the area, all above 20
mph. It makes that