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Stromer glossary

If you’re not an e-mobility expert already, then you can become one here:
Our glossary includes definitions of all the important terms relating to Stromer and our fast e-bikes.
You can’t find what you’re looking for, even in the FAQ? Use the contact form to let us know.
Enjoy browsing!

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3G

Thanks to 3G technology, the Stromer OMNI has practical functions such as GPS localization, warning message in the event of theft or activation of anti-theft mode. 

Available for Stromer ST5, ST3, ST3 AE and ST1 X. Not available for ST1 and ST1 LE.

A

Accumulator/battery

The e-bike battery (accumulator) is the energy storage device that supplies the motor of e-bikes, Pedelecs and Speed Pedelecs with electricity. While it is colloquially referred to as a battery, strictly speaking it is usually an arrangement of several interconnected rechargeable accumulator cells. The range of the e-bike depends on the capacity of the battery.

Four different batteries are available for Stromer Speed Pedelecs with ranges of 90 km (500 Wh), 120 km (618 Wh), 150 km (814 Wh) and 180 km (983 Wh). Each battery is compatible with any Stromer. Did you already know? The Stromer V1 was the world's first S-Pedelec to have its battery integrated into the downtube 

 

Ampere/Ampere-hour

Ampere is the unit of measurement of electric current. It describes how many charges per a specified time flow through a given conductor cross-section. The capacity of batteries is specified in ampere-hours (Ah). An ampere-hour (Ah) is the amount of charge that has flowed through a conductor after one hour at a current strength of one ampere. 

Assistance level

The motor assistance is specified as a percentage of the pedaling force used and is often divided into levels of 50 %, 100 % and 150 %. Our PRO Series drives offer the highest level of assistance with a maximum pedaling force assistance of 500 %.

Learn more.

Assistance mode

All Stromer Speed Pedelecs have a motor assistance in three different assistance modes that boost your pedaling force up to a speed of 45 km/h. The Stromer ST5 is additionally equipped with a Sport mode that unleashes additional power at the press of a button.

B

Battery

The e-bike battery is usually a rechargeable battery (accumulator). This is the energy storage device that supplies the motor of e-bikes, Pedelecs and Speed Pedelecs with electricity. 

Battery capacity

The battery capacity refers to the stored amount of electricity of a battery and is given in the unit Ah (ampere hour). For the range of an e-bike or Speed Pedelec, however, it is not the battery capacity that is decisive but instead the energy in Wh (Watt hours).

Battery management system (BMS)

The battery management system (BMS) is an electronic circuit for monitoring the e-bike battery. It increases the safety of a battery pack by ensuring that all cells are operated only in the permissible voltage range. The load output is switched off if the currents are too high, the temperature is too high or if the permitted voltage window of a cell row in the battery is exceeded. A deep discharge of the battery in normal operation is prevented. In the event of problems with the charger, the BMS prevents the battery from overcharging.  The Stromer OMNI app can be used to monitor charge level, status and temperature of the battery.

Battery upgrade

When you purchase your Stromer, we offer several upgrade options. In the Stromer Configurator, you can put together your desired model with individual equipment, receive a direct price overview and contact your dealer. Or you can get advice directly from a Stromer dealer near you. 

Bluetooth

All current Stromer S-Pedelec models can be connected with the smartphone via Bluetooth.

Boost function

Stromer Speed Pedelec models up to model year 2018 feature the “Boost function”, which accelerates the bike to 20 km/h at the push of a button and without pedal assistance. Since 2018, this is no longer allowed. 

Bottom bracket motor

See mid-mounted motor.

BQ500

The BQ500 with 500 Wh for a range of 30–90 kilometers is the standard battery for the Stromer ST1

Each Stromer battery is compatible with any model. When buying a new bike, select a more powerful battery as an option in the Stromer e-bike Configurator or order replacement batteries from your Stromer dealer

BQ618

The BQ618 with 618 Wh for a range of 40–120 kilometers is the standard battery for the Stromer ST1 X.

Each Stromer battery is compatible with any model. When buying a new bike, select a more powerful battery as an option in the Stromer e-bike Configurator or order replacement batteries from your Stromer dealer

BQ814

The BQ814 with 814 Wh for a range of 50–150 kilometers is the standard battery for the Stromer ST3. Please inquire about upgrade options when buying a new bike.

Each Stromer battery is compatible with any model. When buying a new bike, select a more powerful battery as an option in the Stromer e-bike Configurator or order replacement batteries from your Stromer dealer

BQ983

The BQ983 with 983 Wh for a range of 60–180 kilometers is the standard battery for the Stromer ST5 and one of the most powerful batteries on the market.

Each Stromer battery is compatible with any model. When buying a new bike, select an additional battery as an option in the Stromer e-bike Configurator or order replacement batteries from your Stromer dealer

C

Cadence sensor

The cadence sensor measures the pedal revolutions per minute.

Charging cycle

One charging cycle is the complete charging and discharging process over the entire battery capacity. If charging or discharging is incomplete, this is referred to as partial charging or partial discharging. Only full cycles are taken into account for the aging of batteries.

Connectivity

With the cloud-based platform Stromer OMNI connect, Stromer has developed its own communication system for its Speed Pedelecs: You can set the riding characteristics according to your needs using the on-board computer. Intelligent functions like “Smartlock” automatic locking, keyless battery ejection, anti-theft protection with GPS localization and individual motor settings make the daily commute even more comfortable. The Stromer OMNI app also allows your Stromer to communicate with you at any time. Find all Stromer OMNI functions as well as availabilities for each model in the OMNI overview download. Download the OMNI app for your smartphone directly from the App Store or Google Play Store.  

Controller

The controller is the control unit of the conversion kit. It controls the motor using the signals it receives from the pedal sensor and the display. We offer two controllers: the IPS controller with default values and an EBS programmable controller that can be customized.

CR245 charger

The Stromer e-bike charger CR245 with floating voltage and 245 W output is practical when you are on the go and is compatible with all Stromer models and batteries. Not available in the USA. 

It can be ordered when buying a new bike using our Stromer e-bike Configurator or separately from your Stromer dealer

CR246 charger

The new Stromer e-bike charger CR246 with floating voltage and 246 W output is compatible with all Stromer models and is particularly quiet. Not available in the USA. 

It can be ordered when buying a new bike using our Stromer bike Configurator or separately from your Stromer dealer

CR246 charger

The particularly small Stromer e-bike charger CR246 with floating voltage and 190 W output is practical when you are on the go and is compatible with all Stromer models and batteries. Not available in the USA. 

It can be ordered when buying a new bike using our Stromer e-bike Configurator or separately from your Stromer dealer

CR65 charger

The particularly small Stromer e-bike charger CR65 with floating voltage and 65 W output is practical when you are on the go and is compatible with all Stromer models and batteries. Not available in the USA. 

It can be ordered when buying a new bike using our Stromer e-bike Configurator or separately from your Stromer dealer

Cycl-e ST tires

The Cycl-e ST e-bike tire developed by Pirelli for Stromer is optimized for urban riding. The Cycl-e is the standard tire for the Stromer ST3.  

It can be ordered when buying a new bike using our Stromer e-bike Configurator or separately from your Stromer dealer

Cycl-e tires

The high-performance tire developed by Pirelli for Stromer offers perfect wet grip and puncture protection for city riding. The Cycl-e is the standard tire for the Stromer ST5.  

It can be ordered when buying a new bike using our Stromer e-bike Configurator or separately from your Stromer dealer

D

Deep discharge

All battery chemistries basically exhibit unavoidable self-discharge, i.e. the stored electrical energy decreases over time. In modern lithium-ion cells, however, self-discharge occurs very slowly, with around 2–3 % charge loss per month. Over extended periods or due to excessively long storage of a battery completely discharged beforehand, however, there is a risk of the cell voltage dropping below a required minimum value. This process is called deep discharge and usually leads to an irreversible total failure of the battery, which cannot be prevented even by a modern battery management system (BMS). In practice it is recommended to store a lithium-ion battery with a charge status of approx. 40–60 % in a dry and cool (15–20 °C) place depending on the length of planned storage (typically 5–6 months). Storage in a fully charged state is also possible, but leads to faster cell aging overall. 

Design

The award winning integrated design of the Stromer e-bike combines aesthetics and technology to perfection: from the tidy cockpit, the on-board computer integrated in the toptube and the sporty, striking frame silhouette with internal cable routing and integrated battery to the virtually invisible motor in the rear axle. Thanks to balanced weight distribution, you agilely cruise with your Stromer Speed Pedelec with safe roadholding through city traffic.

Discharge current

Discharge current refers to the current that the battery can deliver over a period of time. It does not remain constant over this period, but decreases with decreasing voltage. Depending on the type of current drain for which the battery is suitable, the discharge process also changes.

E

E-Bike

E-bikes are all electric bicycles that are not Pedelecs or Speed Pedelecs. In German-speaking countries, the term is often mistakenly used for any type of electric bicycle. 

Learn more about the differences between e-bike, Pedelec and Speed Pedelec

Electric bicycle

“Electric bicycle” is the collective term for electrically powered two-wheelers. 

Learn more about the differences between e-bike, Pedelec and Speed Pedelec

 

 

F

Freewheel

Freewheels connect rotating parts in one direction of rotation, while no coupling occurs in the other direction occurs. This enables very light, low-resistance rolling when the motor is switched off. The most common example is the freewheel in the rear hub of wheels. When you stop pedaling, the bike continues to roll without the cranks spinning. Without freewheel, this would not be possible and riding comfort would be affected. 

G

GPS localization

All Stromer Speed Pedelecs with Stromer OMNI Interface C can be located via GPS.

H

Hub motor

Hub motors, unlike mid-mounted motors, are installed in the central hub of the front or rear wheel, making them the most direct way to power a wheel. At Stromer, we have relied on powerful rear-wheel motors from the very beginning.

K

Keyless

The “Keyless” function enables keyless battery ejection at the touch of a button

Not available on the Stromer ST1 X.

L

Lacing

Lacing is the installation of the motor in a wheel.

Li-ion

Li-Ion Akku

Li-ion is the abbreviation for lithium-ion. We offer batteries exclusively with lithium-ion technology, as this is superior to all other technologies in terms of energy density, service life and voltage level. More on the topic: battery technologies.

M

Mid-mounted motor

Mid-mounted motors are located in the bottom bracket area and directly drive the chain rings. Stromer has relied on rear-wheel or hub motors from the very beginning.

Motor settings

You can use Stromer OMNI to adjust the behavior of the motor, for example to select an assistance mode or regulate the pedal and brake sensors.

MCU

A microcontroller is a semiconductor chip that contains a processor and peripheral functions at the same time. This makes it a single-chip computer system. The term system on a chip or SoC is also used for some microcontrollers.

O

Overcharging

Overcharging occurs when a battery is supplied with too high a current for a long time. This can destroy the battery.

Overcurrent

Overcurrent is current that exceeds the maximum continuously permissible current. The resulting heat can damage connected devices. A battery management system (BMS) or controller can be used to prevent overcurrent.

For maximum service life, all batteries for Stromer Speed Pedelecs are equipped with a battery management system and controllers. 

P

Pedaling force assistance (BionX)

The sensor in the motor axle measures not only the speed, but also the pedaling force. The assistance is activated proportionally to the pedaling force. Depending on the strength of pedaling, the strength of the support is also increased.

Pedelec

“Pedelec” is the abbreviation for “Pedal Electric Cycle”. 


Learn more about the differences between e-bike, Pedelec and S-Pedelec.

Power

Most efficient drive for Speed Pedelecs: The powerful Stromer e-bike rear-wheel motor transmits all its power directly to the hub for acceleration without delay from the first few feet. Because the torque remains unaffected by gear changes, you can steplessly take advantage of the full dynamics from 0 to 45 km/h – with the utmost running smoothness and virtual silence.

Push assistance

The Stromer e-bike push assistance accelerates your bike to 6 km/h and supports you while pushing. This is particularly practical on inclines or steep ramps. The push assistance can be activated via the display of your Stromer Speed Pedelec.

Pinion gearbox

Pinion gearbox technology functions on the basis of spur gearing with two gearing sub-units connected on the output end. The combination of both gearing sub-units with their different gear pairs generates the individual gears.

You can find more information about Pinion gearbox technology here: https://pinion.eu/en/technology/

R

Range

The e-bike range depends on various factors, such as rider weight, gradients on the route, pedaling force of the rider, wind strength, outside temperature, battery power and battery age. 

The high-quality Stromer e-bike batteries available in four power levels and the efficient rear-wheel motor allow peak ranges of up to 180 km and, even with the highest motor assistance, are still capable of reaching 60 km. Your Stromer e-bike generates an extra range of up to 20 percent through regenerative braking. Stromer batteries can be charged quickly at every socket – after removal at the press of a button or directly in the bike.

Regenerative braking

Regenerative braking refers to the recovery of energy through downhill driving and braking. The energy generated in this way is fed back into the battery – in our experience, up to 10 % of the lost energy. This allows the overall range to be increased significantly.

Remote services

Remote service means you are always informed about the current status of your Stromer: e.g. battery charge level, battery temperature and engine temperature. And so is your specialist dealer, through whom you can have remote maintenance and automatic updates performed “over the air” thanks to new OMNI functions. Currently only possible with the ST1.

S

Smartlock

The “Smartlock” function enables automatic locking and unlocking of your Stromer Speed Pedelec via Bluetooth. 

Available for Stromer ST5, ST3 and ST3 AE models. Not available for ST1 X, ST1 and ST1 LE.

Speed Pedelec, S-Pedelec

Speed Pedelecs or S-Pedelecs are fast Pedelecs that allow a speed of up to 45 km/h. They are especially suitable for commuters who want to cover long distances to work without a car.

Learn more about the differences between e-bike, Pedelec and Speed Pedelec

Speed sensor

The speed sensor measures the current vehicle speed. In our hub motors, it is located in the motor housing.

ST1

The legendary first Stromer model, redesigned and relaunched: The new Stromer ST1 is a top-class beginner Speed Pedelec with striking design and reliable drive power – for modern mobility and maximum performance.

Discover all Stromer Speed Pedelecs

ST1 Launch Edition, ST1 LE

The Stromer ST1 Launch Edition (ST1 LE) in Yellow is equipped with extra range and the right flair for very special riding fun – available as a limited edition.

Discover all Stromer Speed Pedelecs

ST3

Efficiency and elegance for business and day-to-day life: The Stromer ST3 is an extraordinarily dynamic S-Pedelec with customizable riding position and smart extras – for stylish mobility in commuter traffic.

Discover all Stromer Speed Pedelecs

ST3 AE

The Stromer ST3 Anniversary Edition: Our anniversary Speed Pedelec based on the ST3 in elegant Deep Red. Celebrate 10 years of Stromer with this limited edition and enjoy the extra range of 180 kilometers!

Discover all Stromer Speed Pedelecs

ST5

The Stromer ST5 combines high-end components with fully integrated design – a Speed Pedelec with maximum performance and riding dynamics. Its outstanding features were recognized with the Design & Innovation Award 2020

Discover all Stromer Speed Pedelecs

Statistics

The “Statistics” function presents you with all the performance data of your Stromer Speed Pedelec, such as mileage, performance history or number of days you have ridden. 

Available for the models Stromer ST5, ST3, ST3 AE and ST1 X. Not available for ST1 and ST1 LE.

Suspension

The Stromer e-bike suspension fork and the suspension seatpost offer additional comfort and protect the wrists and back from vibrations and impacts. They are available for Stromer Speed Pedelecs as an upgrade option.
 
The models Stromer ST3 and Stromer ST1 can be configured or retrofitted with an e-bike suspension fork and the Stromer ST5 with a suspension kit, comprising a suspension fork and suspension seatpost. The suspension options are available to you when buying a new bike via the Stromer e-bike Configurator or via your Stromer dealer

T

TA754

The TA754 e-bike tire developed by Vee Tire for Stromer is optimized for urban riding. The TA754 is the standard tire for the Stromer ST1.  

It can be ordered when buying a new bike using our Stromer e-bike Configurator or separately from your Stromer dealer

Torque

The torque is specified in Nm (Newton meters) and provides information about the relative climbing ability of Pedelec and e-bike motors.  One Newton corresponds approximately to the weight force of a bar of chocolate with wrapping (a little over 100 g mass).

Torque sensor (TMM)

A torque sensor is a device for measuring torques. It is integrated into the bottom bracket or rear wheel hub motor and detects how hard the rider pedals. The power of the drive’s assistance can thus be coordinated particularly harmoniously.

TnT

Track and trace modules are basically modems. They establish the connection to the mobile data network of local operators and are used to locate the bike. 

Triple anti-theft protection

The triple anti-theft protection provides triple protection for your Stromer Speed Pedelec in locked mode:

1. Electronic motor locking: Your Stromer cannot be ridden without unlocking it via the Stromer OMNI app or entering the PIN on the display.
2. Warning message thanks to 3G technology: As soon as your Stromer is moved while in locked mode, you receive a text message or an email.
3. GPS localization: Your Stromer can be located at any time via GPS.

Available for Stromer ST5, ST3ST3 AE and Stromer ST1 X. Not available for, ST1 and ST1 LE.

TW757 winter tires

With a special rubber compound and a profile for more grip, our specially developed e-bike winter tire TW757 offers particularly good purchase in the cold season. 

It can be ordered when buying a new bike using our Stromer e-bike Configurator or separately from your Stromer dealer

 

V

Volt

The volt describes the electrical voltage.

W

Watt (W)

The unit watt describes the power, for example of an electric motor

Watt-hour (Wh)

The watt-hour is a unit in which work or energy is measured. A watt-hour corresponds to the energy that a system, such as an electric motor, consumes or emits at a rate of one watt per hour.