The ST2 comes in 2 frames: The Sport frame for sporty riding and maximum agility; The Comfort frame that is easy to climb onto and off and with maximum agility.
Technical Data
MOTOR
Motor: Stromer CYRO Drive IG
Output in watts: 570 W
Torque: in Nm 40 Nm
Category: US | CA Class 3, up to 28 mph | Class I, up to 32 km/h
BATTERY
Battery | max. range: BQ618 | 48 V | 618 Wh | up to 75 miles
Charger: Stromer CR246 | 246 W
Max. charging time: 4 h
CONNECTIVITY
Display | Interface: OMNI C
Connectivity: Mobile connection (free of charge) | Bluetooth
App: OMNI
Keyless: Yes
Smartlock: Yes
Settings: Yes
Display of range: Yes
GPS positioning: Yes
COMPONENTS
Frame | Fork: Aluminium
Frame size Sport: M <178cm | L >175cm
Frame size Comfort: M <178 cm (Cool White only)
Stem M 90 mm +17° | L 110mm +17°
Stem: cell phone bracket –
Handlebar: Sweep (Rise 0 mm | Back Sweep 15°)
Grips: Ergon GA30 Single Twist Shift black
Rim: Stromer 27.5 x 30 by Alexrims
Tires | Dimension: Stromer E-Gridlock by Vee Tire | 57-584
Brakes: Stromer HD922 by Tektro
No. of pistons at front | rear: 2 | 2
Brake disk at front | rear: 203 mm | 203 mm
Shifting system: 5-Speed by Sturmey Archer
Crank: FSA Gossamer, Gates Sprocket 60T
Saddle: Ergon ST10
Fender: Yes
Carrier | max. 22.5 kg: Yes
Horn: Yes
Stromer Daylight: Yes
Headlights: Roxim Z4E Pro
Lumen low-beam | high-beam: 600 | 900
Rear light with brake light Roxim: R3E
COLOR
Frame color: Royal Blue | Dark Grey
MODEL COMPARISON
1 review for ST2
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CC E-Cycles –
Video Review
Written Review
The ST2 is a third generation electric bike from the Swiss brand Stromer that has been around since 2009; the bike is distributed globally. It maintains the quality, style and speed performance of the older ST1 Platinum but adds bluetooth connectivity for an app which allows riders to “tune” settings and activate anti-theft features including GPS location with a tracking range in the hundreds and possibly thousands of miles (wherever the GSM network gets service). It’s got built in GSM hardware that can communicate with a cloud network for automatic updates, a touch screen LCD interface and beautiful LED lights front and rear in addition to an included City Kit with aluminum alloy fenders and carry rack. All of this along with an enlarged battery pack for increased power and range but the ST2 weighs about the same as the older ST1 at ~62 pounds depending on the frame style and size. It’s pretty amazing and it costs $6,990… so it had better be 🙂
Driving the ST2 is a 500 watt gearless rear hub motor setup in a direct-drive configuration. It offers 42 newton meters of torque and has a peak output of 800 watts which is very noticeable when riding. It’s quiet but but very responsive and powerful. Adding to this sense of power is a TMM4 torque sensor (a metal plate that senses strain built into the right rear dropout) and an accelerometer and gyro in the LCD display unit which helps the computer assess terrain steepness. This is truly one of the most impressive feeling ebikes I’ve ridden and with three levels of assist you can choose to optimize for distance (up to 90 miles) or speed (up to 28 miles per hour).
Powering the drive system and LED lights is a purpose built Lithium-ion battery pack that can be charged on or off the bike. It weighs a bit more than last-gen batteries from Stromer (about four pounds more) but you get a massive 48 volts of power and 17 amp hours of capacity. I love that even though the battery mounts inside the downtube on this bike, they still included water bottle cage braze ons. I love that the motor and battery on this bike work together to allow regenerative braking to “recoup” energy as you apply the brakes and during the video review I mentioned that the brake cut-off to the motor seemed a bit delayed. This may have been due to regen activating. Keep in mind that if your battery is completely full, regen won’t work (this protects the battery from overcharging).
There’s a lot to say about the new backlit display panel that’s built right into the top tube, just behind the head tube. It’s very beautiful and sleek but not as easy to read as a handlebar mounted display. I’m near sighted for one thing and having to look even further down (both vertically and horizontally back towards my crotch vs. the handlebars) isn’t perfect. Still, I didn’t use the display as much as the button pad that’s nicely situated near the right grip. This has an on, up and down button which are rubberized and backlit. I like this approach vs. the little joystick on the Specialized Turbo which seems more delicate but I prefer the display on the Turbo to the fancy touch screen here. On the ST2 the touch screen can cycle through readouts and adjust settings. All in all, this system definitely gets the job done and I do like that they’ve included front and rear lights in addition to a female USB port in the head tube for charging your smart phone or other electronic device (which you could use for GPS navigation, music etc.).
All things considered, this is one of the most beautiful, enjoyable and well thought out electric bikes I’ve ever seen. It’s completely purpose built and the addition of thru axels for increased strength, hydraulic disc brakes for improved stopping power and new bottom bracket hardware to reduce the gap where the cranks insert (keeping out dust and debris) set this ebike apart. Indeed, it is expensive, but still comparable to the Haibike Superrace and Specialized Turbo S which offer speed pedelec performance and custom frames. I love that the ST2 has a smart phone app that puts you in control of security and opens the system up for performance tuning. With this bike you can get a size and style that fits, enjoy quality accessories that all run off the same power system and benefit from future improvements to software all downloaded for free directly to your bike.
This is the kind of innovation I’ve heard about and seen on Kickstarter and design labs at Universities across the world and while I’m excited to see it in person, I can’t wait to see Stromer add even more features down the road such as radar powered car proximity alerts with haptic feedback in the handlebars, heart rate driven motor output, continuously variable transmissions and belt drives for shifting at standstill and quieter operation. Perhaps we’ll see Google Glass integration for crash impact alerts and data syncing with a rear safety camera in addition to the LED lights (something like Fly6). The ST2 is the closest thing I’ve seen to this type of technology reaching mass markets and it’s very exciting.
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