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Full carbon integrated electric mountain bike

The SIERRA is a light, integrated, full carbon electric mountain bike offering aggressive power, great range and a sleek design. Take over any terrain.


FuroSystems SIERRA Carbon Mountain Electric Bike

This includes:
FuroSystems SIERRA 250W
Standard 2A Charger
2-Year Warranty

Choose SIERRA:


+ Free Complete Lighting Kit
+ Free Front and Rear Fenders

Delivery 2 - 5 days


or £366/month for 6 months

Free Shipping
No Hidden Fees. Ever.

Due to high demand delivery date can change. Act fast to secure your date!

The SIERRA's frame is engineered to be light and robust while smoothly integrating all its electronics.

Combined with a powerful mid-motor, a high-performance battery, two Shimano chainrings and 9-speed Shimano gears, it is lighter, easier to handle, more comfortable, faster and more energy-dense than most electric bikes on the market.

The SIERRA is the perfect bike to dominate any terrain with style. It is a truly high-end mountain ebike brought to you at an affordable price with modern technologies and world-class engineering.

Your satisfaction is our passion.
While our world class engineers design the ultimate products, at the best prices, our support team is always there for you, wherever you are.

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Integrated Electric Mountain bike

Full Carbon Integrated Design

The SIERRA's full carbon frame is manufactured using state-of-the-art aerospace technologies and integrates its battery, motor, wires, cables and electrical components perfectly. Its lightweight carbon frame allows for great manoeuvrability, enhanced range and optimal comfort.

Electric mountain bike mid-motor

Powerful BOFEILI Mid-Motor

With over 500W peak power, the SIERRA's high-performance torque-sensing BOFEILI 250W mid-motor feels exactly how much pressure you are applying to the pedals and reacts accordingly. It provides you with so much power that you feel like a record-breaking Olympic athlete.

Electric mountain bike removable lithium battery

Lithium-ion Battery

We assemble the SIERRA's removable Lithium-ion battery with the best cells available on the market, the same as those used in the Tesla Model S. The result is an incredibly lightweight and compact 375Wh (or 500Wh) battery.

Electric mountain bike LCD screen

Onboard Computer and Backlit LCD Display

See how fast you're going, how far you've ridden, your live battery capacity, average velocity and current power consumption. Choose between 5 pedal assist power modes: transform your SIERRA to a classic mountain bike or a full power all-terrain machine at the touch of a button. The walk assist mode gets you a solid initial boost of 6km/h and makes your high gear starts smoother.

Electric Mountain Biike Hydraulic Disk Brakes

Hydraulic Disk Brakes

We equipped the ultimate mountain ebike with the ultimate stopping system. Shimano M315 Hydraulic Disk Brakes provide long-lasting and powerful braking for the most agressive riders in the most extreme conditions.

Electric mountain bike 9 speed Shimano

18 Speeds Shimano Gears

The SIERRA's powerful mid-motor is connected to 18 Shimano gears distributed through 2 Shimano chainrings and 9-speed Shimano gears. This leads to outstanding torque control, range, speed and hill climbing.

Electric mountain bike front suspension

SR Suntour Front Suspension

Fly downhill, smash mountain trails and own the park with the SR Suntour XCM front suspensions w/ Lockout.

A ride akin to a glide

The SIERRA magnifies your speed and strength. Rediscover cycling and take on any terrain effortlessly.

Keep going further

With a range of over 55km (or 75km), it'll never run out of steam, even on your most daring adventures.

Control through technology

Optimise your ride with the SIERRA's onboard computer. Monitor your travelled distances, average speeds, power consumption and battery capacity.


Electric mountain bike features
MotorBOFEILI Mid-Motor
Nominal/Peak Power250W/500W
Standard/MAX Battery TypeLithium-Ion Samsung/LG Cells
Standard/MAX Battery Specs36V 10.4Ah 375Wh/36V 13.4Ah 483Wh
Battery ExtrasIntegrated design and secure key lock
Standard/MAX Battery RangeMore than 55km/75km at average pace
Standard/MAX Battery Charge Time5.5hrs/7hrs (2.5hrs/3hrs with optional fast charger)
DisplayBacklit LCD with controls
ComputerSW-LCD with modifiable speed limit and 6km walk assist
ReadoutsDistance traveled, current and average velocity (km/h or mph), power consumption (W), battery autonomy and mode
Pedal Assist5 Levels
FrameFull carbon
ForkSR Suntour XCM
Front derailleurSensah RX
Rear derailleurShimano Acera 9 speeds
BrakesShimano M315 Hydraulic Disk Brakes
TiresCST C1846 27.5*2.25
Total Approximate Weight Fully Equipped19kgs
Maximum Recommended Rider Weight150kgs
Rider Height160cm - 195cm/5'2 - 6'4
Road LegalYes
Available AccessoriesFront and rear fenders and complete lighting kit
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