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Top Assisted Speed
28mph
Weight
29.0 kg
Charge Time
6 Hours
Range
Up To 100 Miles
Battery Capacity
814Wh to
983Wh
Speed Pedelecs due to their high speed capabilities, are classified as L1e Mopeds in the UK. They cannot legally be used on the public highway unless they are registered (have a number plate) with DVLA, have a minimum of 3rd party road risk insurance, and the rider has either a valid CBT certificate or Moped / Motorcycle entitlement on their driving licence
The Stromer ST3 is the latest in electric bike technology, challenging the way we commute and pushing the boundaries of what can be considered an ebike.
Building on the hugely popular ST2 platform, the ST3 features new custom developed pirelli tyres and a more powerful SYNO Drive II motor, delivering a huge 820W of power and 44Nm of Torque.
Designed around the idea that commuting by car is unpleasant, stressful and joyless, the ST3 is a perfectly balanced, fun to ride bike that is fast away from traffic lights and nimble through streets and cars.
Stromer bikes are the envy of the electric bike world. With award winning design and rock solid build quality from the Swiss factory, their range of bikes have redefined what an ebike can be and do.
The ST3 is packed full of features and small design tweaks that make it the envy of bike owners world wide.
- Super sticky custom Pirelli Tyres that corner and grip in all weather
- Dedicated App that lets you remotely lock, unlock, flash lights, track via GPS and see riding stats or customise your motor performance. You can even see how much carbon footprint you've saved by not using a car.
- Fast, effortless acceleration from the 820W motor
- Walking assist mode
- Upgrade with a custom fork for maximum suspension support - ideal for bumpy ground. POA.
But don't just take our word for it - read about it in the Guardian or a full tear down review here.
"The Stromer ST3 pedal electric cycle is a phenomenal ride – between screaming exhilaration and abject terror"
"...when the torque sensor feels you push harder, the bike accelerates like a supercar!
It feels like the acceleration will never end."
This is a Speed Pedelec, and is classed as an L1E Moped in the UK. It requires registration with the DVLA in the UK and the appropriate licence.
820W Power
814Wh Battery
Up to 100 Miles Range
28 mph
Stromer ST3
Meet the new commuting standard.
New Motor
The newly developed SYNO Drive II motor produces 820W of power and 44Nm of torque all the way up to 28mph. Hills are no longer even noticeable, and the fast acceleration to the rear wheel gets you away from traffic lights wth confidence.
The motor is near silent in operation, and combined with the wire-free design at first glance this does not look like an ebike at all.
You'll arrive at the office before car driving colleagues, and you'll be far happier too! Traffic jams are a thing of the past.
Regenerative Brakes
To extend your range even further several levels of regenerative braking are available to recuperate energy back into the battery. The battery is protected against over-charge, so even when full it won't have charge put into it.
Battery
A huge 814Wh battery is fitted as standard, with an optional upgrade to a 983Wh for extra range up to 100 miles on a single charge.
The whole battery is seamlessly integrated into the frame and is released at the push of a button - either via smartphone or using the on board display. No key required.
The connector is magnetic for easy "snap on" charging. When connected and if the cable is knocked, the connector will auto-release without risk of damanging the battery or cable.
Integrated Display & Mount
An integrated touchscreen display gives key information on battery status, distance travelled and speed. The battery tray can be released using this display too.
Your Smartphone can be mounted as an extra display using the in-built attachment mount. A USB power point is provided by the front light, giving power to a navigation system or charge a phone.
Balanced
The ST3 has been designed for being nimble in traffic. A shorter wheel base, short chain stays and a low bottom bracket combine with 27.5" wheels and a geometric frame to give agile and responsive handling.
Elegant
Elegant in appearance, the ST3 has all cables internally routed for protection and to achieve a stunning, clean design.
Custom Developed Tyres
Stromer worked with Pirelli to develop a new, custom range of tyres dedicated for electric bikes. The Cycl-e ST give grip in all weather conditions, and are reinforced to lower the chance of punctures.
Integrated Lights
A powerful Roxim Z4E Pro front light and R3E rear light are fitted as standard. A high beam and low beam mode is toggled between using the easy rach handlebar controls.
With the famous "U" shaped front light, Stromer have incorporated a USB charger hidden away beneath a panel for charging phone or navigation systems while on the move.
Stromer has made a strong name for itself over the years, with powerful bikes, high end components and impressive spec sheets. Now one of the most desirable electric bike brands, the integrated light is a subtle nod to what you are riding.
Latest Connectivity
The proprietary Omni platform that Stromer has developed makes the ST3 one of, if not the most technologically advanced bike on the market.
Controlled by an Andriod or iOS device, it connects you to the bike to release the battery door, lock and unlock the bike and track its location via GPS.
You are even able to adjust motor settings to perfect your ride style. Issues can be debugged remotely and software updates are sent for free over the air, reducing the need to regularly visit a shop for servicing.
Custom Seating Postion
Three different handlebars and two different stems have been developed to fully customise your ride experience for maximum comfort. Get in touch after you have purchased to discuss which is right for you.
| ST3 | ST3 Launch Edition | |
|---|---|---|
| Motor | SYNO Drive II* | SYNO Drive II* |
| Supported Speed | up to 45 km/h | up to 45 km/h |
| Output | 820 W | 820 W |
| Torque | 44 Nm | 44 Nm |
| Standard Battery | BQ814 814Wh | BQ983 983Wh |
| Optional Battery | BQ983 983Wh | - |
| Frame Colors | Deep black, cool white | Deep green |
| Frame Size | Sport: M, L, XL | Sport: M, L, XL |
| Comfort: M | ||
| Fork | Stromer Alluminium | Stromer Alluminium |
| Brakes | Stromer HD942 by TRP | Stromer HD942 by TRP |
| Drivetrain | Shimano XT/SLX Microshift 11 Speed 11-42 | Shimano XT/SLX Microshift 11 Speed 11-42 |
| Crankset | Stromer FSA Gossamer 52T | Stromer FSA Gossamer 52T |
| Frontlight | Roxim Z4E Pro | Roxim Z4E Pro |
| Taillight | Roxim R3E | Roxim R3E |
| Daylight | Stromer Daylight | Stromer Daylight |
| Fender | Stromer Custom Alloy | Stromer Custom Alloy |
| Carrier | Stromer Racktime | Stromer Racktime |
| Tires | Stromer by Pirelli Cycl-e | Stromer by Pirelli Cycl-e |
| Saddle | Stromer Custom | Stromer Custom Brooks C17 |
| Audible Warning Device | Stromer Integrated horn | Stromer Integrated horn |
| Connectivity | Yes | Yes |
There are usually two key types of frame. However, certain brands have slightly different names for them so keep your eye out!
Step Over vs Step Through
Sport - (Step Over)
Sport models will usually have a high tube at the top, in front of the seat. This will usually require you to lean the bike slightly to mount your leg “over” the bike. Sometimes bikes will also be called Diamond, or Gents bikes.
Comfort - (Step Through)
Comfort were traditionally known as “Ladies” bicycles, and in some cases this naming convention has carried through. However, all it tends to signify is a lower top tube. By far the majority of electric bikes are step through because they're so easy to get on and off.
Electric bikes come with a wide range of battery sizes. The size of battery has a significant impact on the cost of the bike, and naturally its range.
The smallest, lightest and cheapest battery sizes are around 325Wh. The largest electric bike battery available is currently produced by Stromer and is a whopping 983Wh. For comparison, a Nissan Leaf has a 40kWh, or 40,000Wh battery.
1Wh stands for Watt Hour. So, a 300Wh battery can deliver 100 Watts of power for 3 hours, or 50 Watts of power for 6 hours. How much power (watts) of energy you use, will depend on your ride style and terrain. Most ebikes allow you to choose the level of assistance given to you, which will then vary how many watts you are using.
Range
It is very difficult to accurately predict range for batteries, as the variations in terrain and ride style will vary the range. Using a low-assistance power setting riding around Amsterdam will get more range from the same battery that’s using high-assistance settings riding around North Wales!
Battery ranges should be taken as a guide only, but are usually representative of average usage for the style of bike.
Electric motors can be located in three different places on electric bikes, each giving different ride characteristics. This is a generalised guide to each location of motor, so please be aware that each bike is different and may have custom implementation to overcome.
Hub Mounted - Front / Rear
Mounted directly onto the hub of the wheel, these motors give power directly into the wheel.
Rear
Many of the speed pedelecs have motors mounted onto the rear hub. This gives several benefits such as direct power delivery, giving better handling and high efficiency due to lack of chain energy transmission loss. Weight is better distributed between the battery, rider and motor. It’s a more natural feeling because most traditional bikes also work by powering the rear wheel - only on an ebike you have more help.
Front
A front mounted motor leaves you freely pedalling the rear wheel like a traditional bike, but pulls you along and reduces the amount of effort needed. Front mounted motors are generally considered as a lower budget choice. However an advantage of them is their simplicity in that it’s very easy to change one if needed. Similar to a rear hub motor system if no assistance is selected the bike behaves in the same way as a traditional bike
Mid Mounted
Motors mounted in the center of the bike can give more balance and weight distribution, with the weight lower down and in the middle of the bike.
They tend to have higher Torque ratings because they have indirect power delivery which means they require more energy to achieve the same result as a hubmotor. They are also more complex and less easy to change in the event of an issue.
They are a good solution for electric mountain bikes due to the balance and offer a comparable ride to hub motors for general leisure use.
We operate our own vans and dedicated drivers, so you know exactly who’s delivering your bike! Bikes are delivered ready to ride with final adjustments made on-site for you.
Free Mainland UK delivery on all electric bikes.
We occasionally use third party couriers for smaller items such as accessories, usually DHL or UPS. In some circumstances DX Freight may be used for larger items for faster delivery.
If you are located outside of the UK Mainland, please contact us for a delivery quotation.
You’re more than welcome to visit our showroom in Rye, East Sussex for a test ride.
We have a range of electric bikes and motorbikes ready for you to try out and explore! It’s best to book an appointment using our form so that we know we’re expecting you and get everything ready.
With all ebikes purchased from us you will receive at home service and support. We will either send a technician to you or arrange for your bike to be collected and brought to our workshop.
We operate fully equipped workshops which provide the latest in service and support, specialising in electric bikes and electric scooters
Our technical centre provides UK wide service for many ebike brands popular in the UK, and we also offer a UK home collection service.
If you have any problems with your bike after you have purchased then get in touch with us and we will help!
How to choose a frame size
Where possible we put recommendations in the product descriptions, so keep an eye out! However there are some general rules you can adhere to when choosing a frame size, which you can see in the table below.
| Rider Height | Frame Size | ||
|---|---|---|---|
| cm | Inches | cm | Inches |
| 148 - 158 | 4'10" - 5'2" | 33 - 37 | 13 - 14 |
| 158 - 168 | 5'2" - 5'6" | 37 - 42 | 15 - 16 |
| 168 - 178 | 5'6" - 5'10" | 42 - 50 | 17 - 20 |
| 178 - 185 | 5'10" - 6'1" | 50 - 57 | 20 - 22 |
| 193+ | 6'4"+ | 57+ | 22+ |
How do electric bikes work?
Electric bikes have motors located on the crank (mid motor), or wheel hub (front or rear motors), which assist your pedalling. In short, it makes your legs feel more powerful!
You still have to pedal (twist and go are not legal in the UK) but the effort required is greatly reduced thanks to the motor. Hills become easier, and getting away from traffic lights becomes quicker as you can get up to speed far easier.
They are the same as riding a traditional bike, only more fun, pleasant and less tiring!
Electric bikes have motors located on the crank (mid motor), or wheel hub (front an, which assist your pedalling. In short, it makes your legs feel more powerful!
You still have to pedal (twist and go are not legal in the UK) but the effort required is greatly reduced thanks to the motor. Hills become easier, and getting away from traffic lights becomes quicker as you can get up to speed far easier.
They are the same as riding a traditional bike, only more fun, pleasant and less tiring!
How long does it take to charge?
Batteries can take up to 6 hours to charge from empty, depending on the battery size and charger. However, you won’t need to charge that often and most users are topping up, rather than charging from 0%.
Batteries are removable and can be charged in your office or home. Some high end electric bikes are coming with regenerative braking to capture energy and top up the battery as you ride, further reducing the time between charges.
All of our models have the latest generation lithium ion batteries. You can charge these as often as you like and do not need to be run down before recharging as there i s no memory effect. Important: It is very important to never let an ebike battery discharge completely as this can make the battery unusable. We suggest charging at least once every three months, even if not in use.
How fast do electric bikes go?
There are two limits to speed of electric bikes. These are limited legally, not technologically.
Electric Bikes (EAPC) can provide assistance up to 15.5 mph (25kmh). Once this speed is achieved, the motor will stop assisting and you have to pedal yourself to go faster. This class of electric bicycle can be ridden by anyone over 14 years old and is treated exactly the same as a traditional bicycle.
This is not the case with “Speed Pedelecs”. Capable of 28mph (45kmh) they are able to effectively replace your car for an inner city commute! However, like a car, they require registering with the DVLA and equipped with a number plate.
Are electric bikes heavier?
Yes. The added weight mostly comes from the battery, which can be extremely dense with cells depending on the size. However, when riding the bike you are not going to notice the extra weight because of the motor assistance and quality ebikes are designed to be balanced. They are usually 7 - 10KG heavier than a standard bike.
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