Is Decathlon Rockrider E-ST 100 Worth Buying? – [Decathlon Rockrider E-ST 100 Review]

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Decathlon Rockrider E-ST 100 Review

  • MSRP: £899.99
  • Frame: Aluminium
  • Wheels: 27.5″ × 2.2″
  • Motor: Motor co-developed with VISION Hub position (in the wheel) 42 Nm torque

What we like about it: An electric mountain bike for low-budget riders, with a full range of features and a superb price/performance ratio.

What we don’t like about it: Not very well suited to extremely demanding terrain.

Rating (4.75/5)

Decathlon Rockrider E-ST 100
Decathlon Rockrider E-ST 100

Although the Decathlon Rockrider E-ST 100 is an electric hardtail mountain bike and is relatively inexpensive, its accessory design is of very high quality.

Whether it’s the lightweight and comfortable aluminum frame, the hub motor with 42Nm of torque and the large-capacity Samsung SDI or LG Capacity battery, or the MICROSHIFT 8-speed transmission system, they are more attractive than bikes in the same price range. Of course, the integrated Rockrider accessories are also its strengths.

These advanced components make up a safe, comfortable, and efficient electric bike. It can support all riders to easily complete long-distance travels on the road or in the mountains.

Next, we will analyze the riding experience, specifications, and other versions of the Decathlon Rockrider E-ST 100. If you want to learn more about bicycle reviews, you can follow us.

Off-Road Riding

Decathlon Rockrider E-ST 100

I have to say, looking back on the nearly 450km mountain journey that the Decathlon Rockrider E-ST 100 has accompanied me on, I am very happy and satisfied. Another thing that needs to be prepared in advance is booking accommodation. This time, I still booked accommodation on IHG Hotels & Resorts, hoping for a good rest.

My off-road trips were mostly completed on the hills near the town or the nearby bike park. The roads in the mountains were mostly unpaved and steep, occasionally with rocks, but they had a unique charm. The dirt roads in the bike park were mostly flat and smooth.

Comfortable Riding Position

Although it may not prioritize comfort as much as those bikes that are designed for comfort, such as the Rockrider E-ST 100, which focuses on handling performance and adventure, it doesn’t mean that its riding position is radical or uncomfortable.

When I first sat on the Rockrider E-ST 100, I felt that my back was upright and my legs were fully relaxed. When I pedaled, my legs felt powerful. After all, the M-sized bike’s 1.47 Stack/Reach Ratio combined with a 73° Seat Tube Angle and a 68° Head Tube Angle is a geometric design that balances comfort and maximum output efficiency.

Of course, the soft and comfortable Rockrider Ergofit Evo saddle and the 31.6 mm alloy seat post are also suitable for off-road cycling. Although it is occasionally bumpy, my butt often feels like it’s getting a massage and doesn’t make my organs uncomfortable.

In addition, the Rockrider sport “oversize” 720 mm wide ALU handlebar makes this riding position more comfortable and durable. The adjustable Rockrider stem, coupled with soft-grip grips, allows my hands to find the most comfortable position during the ride, and I don’t feel tired. Even if I maintain one position and challenge the bumpy off-road terrain, I won’t feel any tingling or other discomfort.

Climbing and Descending

Decathlon Rockrider E-ST 100

After experiencing the performance of the Decathlon Rockrider E-ST 100 mountain bike for the first time, I had to admire that it was probably designed for riders who need to climb and descend a lot.

With a motor with 42Nm of torque, it works well with the MICROSHIFT 8-speed transmission system to make hills flat. Unlike the typical ride where you have to pedal hard with your legs to climb small hills, the Rockrider E-ST 100 with a cadence sensor hub motor has a very natural and smooth-pedaling feel.

I didn’t stand up, nor did I sweat a lot, I just continued to pedal after switching to Boost assist mode and adjusting the gears, and the bike easily bounced up and down in the mountains.

Occasionally encountering narrow downhill trails, even in eco mode, slowing down the pedaling frequency, the wheels still spin quickly under the help of gravity acceleration.

At this time, I enjoyed the feeling of going downhill, feeling the breeze, and relaxing. But I didn’t let my guard down, and I still observed the surrounding environment and terrain. When I encountered potholes, I lightly gripped the brake lever, and the Tektro TKD68 mechanical disc brake quickly slowed me down to ensure that I passed those obstacles safely and at low speed.

Reliable Accessories

The excellent accessories of the Decathlon Rockrider E-ST 100 are also essential for its flexibility and agility in the mountains.

Perhaps the 100mm travel of the Suntour XCT is not dazzling, but it often makes me feel very reassured. Except for occasional bottoming out on too-fast and too-steep slopes, it performs well most of the time. Because when I use the U-Fit technology to adjust the stiffness based on my weight, it can cleverly counteract the vibrations from the ground.

I like the Rockrider All Terrain Light (30 TPI) tires of the Rockrider E-ST 100, which are very reassuring. The 27.5″ x 2.2″ size is fearless on any terrain, with excellent passability, easy passage over rocks, and vibration damping. The reliable rubber material allows it to provide traction without sacrificing grip.

Decathlon Rockrider E-ST 100 General Riding

Considering that the bike has a reliable motor, I am not afraid that its fork and tires will drag me down on the road. Therefore, I often ride the Rockrider E-ST 100 on the road, and its performance is impeccable.

With the large-capacity 380 Wh SAMSUNG SDI cell battery, it can double the mileage on the road. In the slow-assist mode, I can roam the streets for up to 80 kilometers. As long as I occasionally check its LCD control screen, I don’t have to worry about running out of battery and carrying more pedaling weight.

When I occasionally need to get off to buy something or enjoy food, I am also very comfortable parking it on the side of the road. Because the battery is light and supports removal, I can put it in my backpack, lock the bike, and enjoy the fun of shopping.


Needless to say, Decathlon’s configuration of the Rockrider E-ST 100’s specification components is a good value for money.

The lightweight and durable aluminum frame has a comfortable and fast geometry shape, with reliable 100mm travel SUNTOUR XCT and motor and battery in the back to keep the weight at the lowest level to ensure absolute comfort, natural, and fast riding experience for the rider.

The impressive geared hub motor is equipped with a cadence sensor, which not only provides a natural and stable pedal feel but also stops supplying power when the speed exceeds 25 km/h to ensure user safety. And with 3 practical assist modes, it caters to more people’s travel needs.

The high-quality Samsung SDI 18650 lithium-ion cells also have an amazing battery life, supporting riders to enjoy 25km of joyful time even when using Assist level 3 in mountainous areas. And under good road conditions, users can extend the mileage to 85km by slowing down.

In addition, the Microshift 8-speed transmission system and Tekro TKD68 disc brake are also very powerful, ensuring smooth and precise motion and shifting of the bike.

Other versions of the Decathlon Rockrider E-ST

Decathlon Rockrider E-ST 500 V2
Decathlon Rockrider E-ST 500 V2

If you feel that the power provided by the Rockrider E-ST 100 is not enough, or if you expect longer recharge mileage, you can also consider the more high-end Decathlon Rockrider E-ST 500 V2.

With a higher budget, the Decathlon Rockrider E-ST 500 V2 has been upgraded in the motor, first of all, with a Mid-drive position BROSE C Aluminium motor with a torque output of 50Nm, which increases the maximum assistance to 280% and makes pedaling easier.

Of course, the E-ST 500 has also upgraded the battery capacity, with 420 Wh of high-quality Samsung SDI lithium-ion cells, which extends the mileage, although the difference is not significant, it can give riders more peace of mind.

In addition, for riders who find the mechanical disc brakes on the Rockrider E-ST 100 challenging, the Rockrider E-ST 500 V2 offers simpler and more precise braking with the 2-piston Tektro M276 hydraulic disc brakes.

Overall, the Decathlon Rockrider E-ST 500V2 has upgraded in terms of comfort, pedal feel, recharge mileage, and control means, which is very suitable for riders who have some quality requirements.

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What do we like about it?

  • Very cheap electric mountain bike with superb value for money for all riders.
  • The lightweight, sophisticated aluminum frame has a very comfortable geometry.
  • The wheel motors with sensors are designed to provide more natural pedaling and safer speed control.
  • The high-quality Samsung SDI supports disassembly and provides powerful recharge mileage.
  • The MICROSHIFT 8-speed drivetrain is complemented by the Tektro TKD68 mechanical disc brake, making both transmission and braking efficient and simple.
  • Integrated Rockrider components to give the rider a more comfortable riding experience.
  • Wide 27.5″ × 2.2″ Rockrider All Terrain Light (30 TPI) tires support riders to enjoy the mountain, canal slender, horse trails, country lanes, and city streets.
  • Frame, handlebar and handlebars, battery, and parts two-year warranty commitment.

What don’t we like about it?

  • The fork travel is less suitable for more demanding mountain terrain.


  • Where can I buy Decathlon Rockrider E-ST 100?

You can buy it through Decathlon’s official website because I booked it through the official website, which is very convenient. Of course, you can also go to the local authorized dealer to buy.

  • What else do I need to buy online besides the bike?

In fact, by the time the bike arrived, it was pretty much assembled. decathlon also equipped the user with pedals, essentially making it ready to go right out of the box.

  • How much does the Decathlon Rockrider E-ST 100 weigh?

The bike is very light, the largest XL size of the bike, in the case of shaving pedals, but also only 22.5kg, while the S size is only 22.2kg.

  • How long does it take to charge this bike?

I didn’t specifically calculate the charging time of the Decathlon Rockrider E-ST 100. Because we all charge it at night when we are resting. But it only takes about 5 hours to get it to 80%, so a full charge would only take about 6-7 hours.

  • What size Decathlon Rockrider E-ST 100 should I buy?

About the purchase size you can refer to the size chart below but the way to get a good handle on sizing is to go for a test ride on the bike.

Rider Height (cm) Frame Size
165-174 cmM
175-184 cmL

Decathlon Rockrider E-ST 100 Specs


FrameROCKRIDER COMFORT GEOMETRY FRAME in 6061 aluminium with hydroformed tubes Seat tube diameter: 31.6 mm Straight head tube 1 bottle cage mounting point
ForkSUNTOUR XCT 30 fork Travel: 100 mm Dampers: 30 mm Axle: QR Format: 9 x 100 mm
PedalsRockrider 520 Grip resin flat pedals


Rear Derailleur32 T chainring with chain guide, MICROSHIFT MS25 8-speed rear derailleur, Crank 175 mm, MICROSHIFT TS39 right shifter with speed indicator, MICROSHIFT H081 8-sprocket 11-34 T cassette, KMC Z7 chain
BrakesTektro TKD68, Mechanical disc brakes, 1 piston, 180 mm front and rear


RimsRockrider Tubeless Ready, 27.5″, Compatible with wide tyres up to 2.5″, 23 mm (width between hooks), 28 spokes at the front and 36 oversize spokes at the rear rear, 6-bolt disc, Freehub HG
TiresROCKRIDER ALL TERRAIN LIGHT (30 TPI) wide 2.2″ tyres

Electric Components

MotorMotor co-developed with VISION Hub position (in the wheel) 42 Nm torque Cadence sensor Max assistance: 250W The electrical assistance cuts out above 25 km /h in accordance with EU regulations
BatterySamsung SDI or LG Capacity: 380 Wh Our battery supplier sources its minerals responsibly and sustainably, and is part of the “Responsible Minerals Initiative”. Initiative”.
RemoteLCD control screen


Comparison Table

BicyclesPriceGearMotorBatteryClick view
Schwinn Healy Ridge Electric Bike$1,0992×9 250-watt pedal assist hub motor280W Lithium Ion BatteryClick view
REID E-Trail 1.0 eBike$13131×7Bafang SWZ02 250W rear hub motorSamsung 36V 10.4Ah – internal downtube mountedClick view
Huffy Transic + Adult 26″ Electric Mountain Bike$11993×7 350-watt rear hub motor36 volt Lithium-Ion batteryClick view
Himiway ZEBRA1,999 $ (about 1,860 €)1×7750W brushless gear motor48V 20Ah Samsung/LG lithium batteryClick view

Decathlon Rockrider E-ST 100 VS Schwinn Healy Ridge Electric Bike

Schwinn Healy Ridge Electric Bike
Schwinn Healy Ridge Electric Bike

If you take a close look at the Schwinn Healy Ridge Electric Bike, you’ll be more likely to agree with my opinion that the Decathlon Rockrider E-ST 100 offers better value for money.

Even though both bikes use a 250-watt pedal assist hub motor, the Schwinn Healy Ridge Electric Bike falls short in terms of battery capacity and quality compared to the Rockrider E-ST 100. As a result, it lags behind the latter in terms of speed stability, and battery life.

From a comfort perspective, the Schwinn Healy Ridge Electric Bike also doesn’t have an advantage. Although it has a higher Stack/Reach Ratio (1.51), it only comes in one size and has a 100mm steel fork, which means it can’t offer users a customized fit and adds extra weight to the bike.

Of course, the Schwinn Healy Ridge Electric Bike also has some strengths, such as its 2×9-speed gearing system, which may be more useful for hill climbing. However, it may be unnecessary for more complex and varied mountain terrain.

By this point, I believe you have your own opinion on which of the two bikes to choose.

Decathlon Rockrider E-ST 100 VS REID E-Trail 1.0 eBike

REID E-Trail 1.0 eBike
REID E-Trail 1.0 eBike

For riders who are looking for quick charging, the REID E-Trail 1.0 eBike is an attractive option.

Although both bikes use Samsung batteries, the Samsung 36V 10.4Ah – internal downtube-mounted battery on the REID E-Trail 1.0 eBike charges faster, taking just 4 hours to recharge.

With a capacity of 418Wh, it also has a stronger battery life, allowing users to ride up to about 100km on the highest Shimano Steps system assistance setting. Of course, this REID E-Trail 1.0 eBike, works with the Bafang SWZ02 250W rear hub motor, but the range can still reach around 70km.

However, if you consider the geometry for riding comfort and efficiency, you may need to think twice. The REID E-Trail 1.0 eBike’s more aggressive riding position may be suitable for experienced riders, but not so much for beginners and older riders.

Decathlon Rockrider E-ST 100 VS Huffy Transic + Adult 26″ Electric Mountain Bike

Huffy Transic + Adult 26" Electric Mountain Bike
Huffy Transic + Adult 26″ Electric Mountain Bike

For beginners, the 3×7-speed transmission system on the Huffy Transic + Adult 26″ Electric Mountain Bike may be confusing. But for experienced intermediate or professional-level riders, this setup is not only ineffective but also heavy.

We acknowledge that more gear options can help riders make uphill and downhill riding easier and faster. However, in reality, the multiple chainrings and gears are often unnecessary due to their complex operation, whether on complex mountain terrain or flat roads. Most importantly, this design significantly increases the weight of the bike.

On the other hand, if you want to have a longer recharge mileage, the Decathlon Rockrider E-ST 100 is undoubtedly more professional, as the Huffy Transic + Adult 26″ Electric Mountain Bike supports a maximum distance of only 25 miles.

In addition, the Huffy Transic + Adult 26″ Electric Mountain Bike also has a longer charging time, taking approximately 8 hours to complete.

Therefore, if you are a beginner who is looking for an electric mountain bike and wants to have a long riding journey, the Decathlon Rockrider E-ST 100 will be a more suitable choice.

Decathlon Rockrider E-ST 100 VS Himiway ZEBRA

Himiway ZEBRA
Himiway ZEBRA

If we only consider functionality, the Himiway ZEBRA leaves me with the impression of being expensive and heavy. Buying a 35.8kg fat-tire e-bike for off-road mountain biking at $1,999 is not cost-effective.

Undeniably, the quality of the Himiway ZEBRA’s 750W brushless gear motor and 48V 20Ah Samsung/LG lithium battery is very high. It can support pure electric mode, which is very attractive. Plus, with various shock-absorbing accessories, users will feel quite comfortable.

However, the 26×4″ fat tires are more suitable for snow or beach riding and are not very conducive to general mountain biking. The strong grip not only consumes battery power but also makes the rider’s hands feel tired due to the heavy body.

Most importantly, the $1,999 price is too much pressure for users who have a low budget but really like electric hardtail bikes. Therefore, if you have a limited budget and want a comfortable electric hardtail bike, the Decathlon Rockrider E-ST 100 is the best choice.


Overall, the Decathlon Rockrider E-ST 100 is a qualified electric hardtail bike in terms of price, component configuration, comfort, and practicality.

With its lightweight frame, reliable motor, durable battery, and practical transmission and braking systems, it gives hope to users who have a low budget but desire a multi-functional e-bike.

If you’re looking to have an excellent motor to share your pedaling pressure, the Decathlon Rockrider E-ST 100 is the best starting point.

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