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MEN SPORT TRAIL MTB ELECTRIC BIKE

ROCKRIDER E-ST 520 Electric Mountain Bike, Grey/Yellow - 27.5"

ROCKRIDER
4.6/5
User rating
Decathlon
was £1,399.99 -%

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£1,399.99**
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Before£0.00NoW£1,399.99**
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* From and limited stock
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This 27.5" electric MTB (EAMTB) is designed for MTB rides in the mountains. With the E-ST 520 electric mountain bike (EAMTB), you can tackle any climb with the help of its built-in motor (70 Nm torque).
Not Available Now

We currently have limited capacity to build bikes in our warehouse. Due to this, we are limiting the number of bikes we sell per day and you might not be able to process your order at checkout. The count resets at 11pm every day so that would be the best time to try, although we do have a peak of attempts at this time so we can't guarantee a slot for everyone.

Technical Information

WHAT SIZE MOUNTAIN BIKE TO CHOOSE?

Several sizes available:
S: between 1.50m and 1.64m
M: between 1.65m and 1.74m
L: between 1.75m and 1.84m
XL: between 1.85 m and 2.00 m
If you are on the limit between 2 sizes:
Choose the smaller size for easier steering (easier to handle) and comfort (straighter back).
Choose the larger size for easier pedalling with a more stretched-out position (position more suited to performance).

IS ELECTRIC MTB A SPORT?

You have to pedal to go forward!
The electric assistance boosts your pedalling by +300%, helping you ride over obstacles.
You'll get to enjoy longer MTB rides.
The motor stops providing electrical assistance when you stop pedalling.
The walking mode offsets the mountain bike's weight when you need to walk your bike.

A WORD FROM THE TEAM

Our team of mountain bike enthusiasts created this E-ST 520 electric mountain bike entirely at our B'Twin Village in Lille, France.
We designed and tested the E-ST 520 MTB by involving MTB riders at every stage of the project.

STURDY, PLAYFUL FRAME

The frame of the Rockrider E-ST 520 electric MTB is made of 6061 aluminium with hydroformed tubes. Why? The battery sits snugly on the frame to improve the robustness of this electric mountain bike.
The forged aluminium parts make it compatible with the new 27.5"+ tyre format (wider than the 27.5") in the rear, while remaining easy to manoeuvre. We've kept a frame geometry with short bases for easier steering.

MOTOR WITH 70NM TORQUE

The BROSE T Aluminium central motor is specially designed for high altitude mountain biking:
- 70 Nm torque to handle large obstacles and steep gradients
- metal housing for maximum durability
- belt for an ultra-quiet motor
- sealed bearings to hold up to tough environments while mountain biking

LG OR SAMSUNG BATTERY CELLS

Our battery is equipped with battery cells from LG or Samsung, (LGC-MG1 or SDI), which are known for their high level of reliability and safety.
Our battery supplier sources its minerals responsibly and sustainably, and is part of the "Responsible Minerals Initiative".

BATTERY LOCK

Our Rockrider mountain bike team has designed a battery that locks in place with a simple lever. Child's play!
This locking system stops the battery getting shaken when you go adventuring on rough terrain.
There is also a lock in case you want to stop your battery getting stolen. For example, if you park your bike in the street.

CONTROL SCREEN

A discreet LCD control screen. The screen is right next to your left grip so you don't have to let go of the handlebar to choose from the 3 assistance modes available: (Deactivated), Economy, Standard, and Boost.
You'll also find a host of useful information:
-Stopwatch
-Current speed
-Average speed
-Maximum speed
-Distance covered
-Total distance
-Battery level
-Remaining battery range (in km)
-Active assistance mode
-Reset

3 ASSISTANCE MODES

Mode 0 - Deactivated
The battery is not used.
Mode 1 - Economy +60%:
Extend your rides while conserving battery life. A perfect helping hand for small gradients.
Mode 2 - Standard +120%:
This is the most versatile mode. Climb any slope without getting too tired and without using too much power.
Mode 3 - Boost +320%

ROCKSHOX FRONT SUSPENSION

Ride over obstacles (roots, pebbles, stones, etc.) easily thanks to the Rockshox 30 SILVER fork with 120 mm of travel.
This fork has:
- A coil spring for maximum sensitivity and reliability - a lockout and rebound adjustment for better control, depending on the terrain

SINGLE CHAINRING DRIVETRAIN

The E-ST520 electric bike is equipped with a single chainring and ChainFlow 3D anti-slip technology to prevent the chain from derailing.
A single shifter on the right handlebar makes it easy to shift between the 9 speeds.
In detail:
-Chainflow & anti-drop single chainring with 34 teeth
-MICROSHIFT ADVENT 9-speed rear derailleur with long cage
-MICROSHIFT ADVENT right shifter
-MICROSHIFT H092 9-speed cassette (11-42 teeth)
-KMC E9 Sport electric bike-specific chain

WIDE 27.5" DOUBLE-WALLED RIM WHEELS

These wheels were specially designed for this mountain bike:
- 23 mm rims (width between brackets), 28 spokes at the front and 32 spokes at the rear, for greater durability and good grip with wide tyres (up to 2.5").
- BOOST thru rear axle (12x148) for greater durability
- Aluminium hubs with sealed bearings
- TUBELESS READY rims: you will need tubeless tyres, Presta valves, and puncture sealant.

HUTCHINSON TYRES

So you feel safe on any terrain, and for traction suited to your motor, the E-ST520 electric MTB is equipped with Hutchinson Cougar 27.5" tyres with a 2.4" cross-section. Our test riders particularly liked these tyres for their good grip. Mounted on wide rims, these tyres ensure grip, traction and comfort on any terrain.

HYDRAULIC DISC BRAKES

No matter the conditions you ride in (dry, muddy, wet), the Tektro TKD88 hydraulic disc brakes at the front and rear provide powerful, progressive braking. Oversized 180mm diameter discs provide even more power.

HANDLEBARS, STEM, GRIPS

The adjustable stem brings the E-ST 520 controls to your hands. The all-aluminium ROCKRIDER stem is 70 mm (size S), 80 mm (size M/L), or 90 mm (size XL) and can be raised to 5 adjustment intervals: + 0mm, + 7.5mm, + 15mm, + 22.5mm, + 30mm.
In detail:
- 720mm oversize ROCKRIDER SPORT aluminium handlebar
- ROCKRIDER SPORT "soft touch" ergonomic grips for good grip and a comfortable feel

SADDLE

Since your mountain bike rides will get longer and longer, it is important to have a suitable seat. So our teams designed the exclusive ROCKRIDER Ergofit Evo saddle. It fits all hip sizes and has a curved shape that is particularly good for sport trail rides.
The 31.6 mm aluminium seat tube ensures compatibility with most dropper and suspension seat posts on the market.

PLATFORM PEDALS

The E-ST520 electric bike comes with ROCKRIDER Flat MTB platform pedals. The pedalling surface is wider and dots are more pronounced for better foot contact on the pedal.

ACCESSORIES

Your E-ST520 mountain bike is supplied with a bell, lights, wheel reflectors and pedals.
The frame is compatible with:
- front and rear mudguards
- stand
- bottle cage (on the horizontal tube)
- saddle pouch
- rear pannier rack (fixed onto the seat stays or special mounts for wide bikes, 148 mm gap for the rear wheel & 2.8" fat tire)
- child seat
...

OUR ADVICE FOR YOUR FIRST RIDE

Tip no.1
When mountain biking, there is always the risk of a fall: don't forget to wear a helmet.
Tip no. 2
A puncture could happen at any time, so always remember to take a repair kit and a 6 mm Allen key for removing your wheels.
Tip no.3
If you don't want to stop to drink, bring water in a bottle or water bladder to access it while riding.

LEGAL DISCLAIMER

To ensure components last longer, we recommend a maximum load of 120 kg (rider and MTB included).

CARE TIPS

Leave your battery on the bike when washing using a hose. This will protect the connectors from rusting.

Weight

S - 150-164cm: 22.5 kg
M - 165-174cm: 22.5 kg
L - 175-184cm: 22.5 kg
XL - 185-200cm: 22.5 kg
Weight without pedals.

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Composition / advice

Composition
Frame
100.00% Aluminium 6061
Stock advice Store it in a cool, dry place away from corrosive products and salty air. Never store with the battery flat, and remember to recharge it at least once every six months.
Restricted use : Don't forget to remove the battery to handle the chain.
Legal notice To ensure components last longer, we recommend a maximum load of 120 kg (rider and MTB included).
How to choose your product

Our commitments

Test Product Our engineers always have real riders test all our products in real conditions. These tests round out our lab tests and let us validate all our products before they hit store shelves.
Guarantee : Lifetime (frame, stem, handlebars). Availability of spare parts: 2 years.Guaranteed for 500 charges.

Product benefits

Power Head for the summits powered by a 250W motor with 70Nm torque
Autonomy Ride for 2.5 hours at a sporty pace thanks to the 420Wh 36V 11.6Ah battery.
Smooth pedalling The built-in motor automatically assists you when needed. Perfect for MTBing.
Cycling comfort Enjoy: raised position, 120 mm suspension, wide tyres, hammock Ergofit saddle.
Directional control Manage your path: hydraulic fork and brakes, tyres and a wide handlebar.

FAQ

Q : How to assemble your bike?
Everything you need to know about making sure your bike is comfortable, secure and ready to ride.
Q : How do you adjust your brakes?
Having properly functioning brakes is vital when out on the road. Check out how to get them working to your liking.
Q : How to replace a brake lever on a bike?
Having properly functioning brakes is vital when out on the road. Here’s a video to show you how to make sure your new brake level is working nicely.
Q : How to replace a disc brake?
Having issues with your disc brake? Then this video is for you.
Q : How to adjust your bike handlebar?
A suitable handlebar height is essential to your cycling safety and comfort. Find out how to adjust it to your liking with our video.
Q : Do you offer a Cycle To Work scheme?
Find out everything you need to know about way of getting to work that’s good you and the environment.Check Here

Your reviews

Reviews by our Team Members

Our customers pictures

Your reviews

FAQ

Q : How to assemble your bike?
Everything you need to know about making sure your bike is comfortable, secure and ready to ride.
Q : How do you adjust your brakes?
Having properly functioning brakes is vital when out on the road. Check out how to get them working to your liking.
Q : How to replace a brake lever on a bike?
Having properly functioning brakes is vital when out on the road. Here’s a video to show you how to make sure your new brake level is working nicely.
Q : How to replace a disc brake?
Having issues with your disc brake? Then this video is for you.
Q : How to adjust your bike handlebar?
A suitable handlebar height is essential to your cycling safety and comfort. Find out how to adjust it to your liking with our video.
Q : Do you offer a Cycle To Work scheme?
Find out everything you need to know about way of getting to work that’s good you and the environment.Check Here