30 - 80 Power
30 - 80 Power
Yamaha PW 250w
Crank Drive System
Restricted to 12.5mph
for kids safety
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This one's pretty obvious - It's for kids who require that little bit of assistance! This 24" wheeled unisex kids electric bike is suitable for children ranging from the age of 9 onwards. A kids specific chassis and refined Yamaha eBike system.
The SDURO HardFour is a revelation for families who want to ride together. Compared to this bike, a PlayStation totally loses its appeal! - Enduro Magazine
Welcome to the sDuro HardFour 4.0 2017, finally we have a 24" kids electric bike. Do your children get fed up and tired mid way through the ride? Do you want to ride further with your family? Or does your child require some support?
The new Haibike sDuro HardFour 4.0 2017 is the answer!
The sDuro HardFour offers refined kids geometry and a smaller 24" wheel. Suitable for boys or girls with an average age of 8 onward.
This simple spec'd bike is great for children and Haibike have included a refined version of the 2017 Yamaha system, learn more further down the page.
The 2017 sDuro HardFour 4.0 features a 9 speed Shimano Acera / Altus gear system with simple to use trigger shifters to give the kids full versatility across varied climbs and descents. Remember with crank drive you can use the gears with the assistance.
The smaller 24" wheels offer kids full control and stability. Small enough to manoeuvre around, but big enough to take on a full day's ride and follow the parents through varied terrain.
Although kids sized wheels, Haibike have built them with decent disc hubs and double wall rims.
On the 2017 sDuro HardFour 4.0 we see the Tektro hydraulic disc brakes. Simple to use and fairly maintenance free, it's a good option on this 24" kid's bike. With the electric assistance we want to ensure braking power remains solid.
Thrown into the mix are a set of 24" Schwalbe Table Top tyres. Both lightweight and durable in their construction, they allow a faster rolling resistance while maintaining grip at the same time.
A good choice for a mixture of surfaces.
The new Haibike sDuro HardFour 4.0 is powered by the latest Yamaha electric bike system. Haibike has partnered with Yamaha to bring a brand new line of sDuro eBikes, this 250w motor offers up to 280% assistance and peaks at 60Nm of restricted torque (on this kids version).
The assistance is set in 3 levels on the kids version - 'Eco', 'Standard' & 'High'. This allows the child to fine tune the amount of assistance required. We also see a new set of controls that loose the LCD screen in replace of simple on / off power and assistance, easy to use buttons.
The Haibike sDuro Hard Four 4.0 2017 eBike is offered with the 400Wh Yamaha battery to give a full day's ride time. Now your son / daughter can join you for the longer rides too!
On the Kids version the assistance speed is lowered down to 12.5mph. We want children to have fun whilst maintaining a safe pace. We also remove the walk assist and simplify the levels to make it as user friendly as possible.
You can learn more / read reviews of the Yamaha eBike system on our blog pages.
This electric bike comes fully set-up by our workshop technicians. You can be sure that every aspect of the eBike has been dialled in for optimum performance. All our electric bikes arrive with a user manual, keys, charger & free follow up service within 3 months.
Our electric bikes also include a 5yr warranty on the frame, 2yr warranty on all the electrics & 1yr warranty on the components. In the event of a problem, we handle all warranty claims in-house. We can also offer worldwide support.
E-bikeshop is a UK Yamaha Electric Bike Service Center and our in house workshop is now exclusively reserved for our own eBike customers. We also have parts / spares to hand should they be required.
*Range is dependant on many factors inc rider weight, wind, hills, terrain etc. For a better estimate, please use our range calculator.
Alu 6061, Hydro Formed, Gravity Casting Interface
SR Suntour XCM LO, 63mm
Tektro HD-M286 160mm
Shimano Altus Rapid Fire 9 Speed
Shimano Acera 9 Speed
Sram PG920, 11-34 Teeth, 9 Speed
KMC X9e 9 Speed
XLC Hubs on Rodi FW Rims QR
Schwalbe Table Top 24 x 2.25
Haibike sDuro Flat Bar 31.8mm 640mm
Haibike TheStem 31.8mm
A-Head, Alloy, Tapered
Alloy Straight Post, 31.6mm
Selle Royal Hello
Yamaha Lithium Ionen 36 Volt, 400 Wh, with BMS Management
Yamaha LED 3-Way Digital Main Display Switch
Yamaha PW Crank Drive 36V 250 Watt. 100 - 280% Assist, 60Nm
30 - 80 miles of power assisted range, depending on terrain
These questions relate to this bike. You can find a full F.A.Q on general eBike & website questions by clicking here.
What sizes is this bike available in?
The Haibike sDuro HardFour 4.0 2017 is available in one frame size for kids: 24" Wheels 34cm (13") frame.
Is this bike in stock now?
The stock status is shown at the top of this page next to the price. If the stock level is shown as 'Pre-Order' this means it is a new model arriving soon, you can see an expected date at the top of each bike description.
Are there any colour options?
No, the sDuro HardFour 4.0 2017 electric bike is only available in the colour shown.
Where can I find a geometry chart of this bike?
You can find the geometry chart of each bike by clicking on the 'Downloads' tab of each bike.
How fast will this bike go?
This bike will assist you to 12.5mph. From there you can pedal faster, but with no assistance.
Where can this bike be ridden?
Under UK law a rider needs to be aged at least 14 to ride an Electrically Assisted bike on the road or any other public place.
Where is this bike made?
MADE IN GERMANY
Can I try the bike before I buy?
Yes of course, you can visit, we can talk you through your riding style and requirements and offer expert advice as to which model to select. We will be able to advise particular eBikes and talk them through in more detail. We also give you the opportunity to ride crank drive bikes so you can get a feel for them prior to purchase.
At e-bikeshop we work by appointment only, so we can talk to each customer on an individual basis to give the best advice possible. If you like the bike, you have the option to take it away there and then with any accessories selected fitted and a full fitting session on the bike itself. We ask you to go for a short ride on the bike to make sure you are happy with the setup and also able to answer any operational questions you may have.
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