Rockrider E-ACTV 500 Hybrid Bike

REF: 8903348, 8871078

ROCKRIDER ACTV 500 HYBRID BIKE

2025

On this page you will find the assembly, maintenance and repair instructions as well as the spare parts for your Rockrider ACTV 500 bike.

Getting started

Finishing your bike's assembly

If you purchase your bike in a Decathlon store or have it delivered to a Decathlon store, your bike will be provided fully assembled.

If you order your bike on the Decathlon website and have it delivered to your home, you'll need to round off the final assembly with a few very simple steps, as shown in the video above.

All the assembly steps are detailed in you bike's instructions. 

Bedding in the brakes

When your bike is fresh out of the box or the Decathlon store, the brake pads and discs are brand new.It is essential to bed them in. A sharp prolonged braking action (for example, during a descent) , with brakes that have never before been used can cause the pads to overheat and "glaze over", which massively reduces their efficiency.

To avoid this phenomenon, we recommend bedding in your brakes.This takes about 10 gentle braking actions per brake. For each braking action, apply a single brake to slow the bike down from about 25 km/h to 5 km/h , without fully blocking the wheel. Repeat with the other brake.

MAINTENANCE

Servicing your bike will keep all of its parts working for as long as possible and ensure you have the most fun when riding. Neglected maintenance can cause a number of problems that can lead to accidents: jammed cables, rust, leaks, premature wear, and more.

Regular maintenance keeps all mechanical parts running smoothly and extends the life of the bike's components.

When you start riding your bike, some components will move slightly.

How to clean your bike

To clean your bike properly, you'll need some bike cleaner, a sponge, and a brush.

Rinse off the bike with a hose and apply the bike cleaner. Next, use the sponge and brush to work the cleaner in. It's essential to give the bike cleaner some time to act before rinsing the bike off.
When hosing the bike off, make sure you do so from a few steps away so as not to damage the mechanical components.
Lastly, dry your bike using a soft, clean cloth.

Also avoid using a high pressure water jet as water might enter your ball bearings!

How to store your bike correctly

It is essential to store your bike correctly to improve its lifespan.

After your ride, we recommend:
> Clean off any mud and sand to prevent your bike from rusting.
> Dry and lubricate your drive train (being sure not to get any on the brakes) to protect it from rust and corrosion.
> Store your bike in a cool dry place.

For winter storage, we have a few other tips to add:
> Put the derailleur on the small cog to release the tension on the cables.
> You can coat your bike in a thin layer of Vaseline, focusing on the spokes and hub, the rims, the handlebar, and the stem. Use a clean cloth, slightly soaked in oil; this will protect the components from dust.
> Hang your bike by the frame to reduce pressure on the tyres and prevent potential cracking.

IMPORTANT: Cool does not mean cold! Avoid overly hot or cold temperatures at all costs. Do not store your bike in the sun, and watch out for winter freeze.
The garage can be a good solution, as long as it stays dry and does not freeze in winter. Otherwise, store the bike inside your house.

STORING YOUR ROCKRIDER E-ST 900 CORRECTLY
CHANGING THE BRAKE PADS

On disc brakes, you need to change the pads regularly. Depending on how heavily you use your brakes, the wear on the pads will be affected.

If you feel a loss of "bite", a loss of performance, or a squeak in your brakes, your pads may be worn out. To be sure, check the thickness of the pad. If there is less than one or two millimetres left, replace it.

Rockrider e-ST900 Electric Mountain Bike
CHECKING CHAIN WEAR

You can check how worn your chain is by using a wear indicator. Simply place the indicator's notch between two links and let the other end drop onto the chain. If it fits neatly between two links, the chain is worn and it's important to change it soon, before it damages the cassette and chainring.

We recommend changing your chain when it's 50% worn. Above 75%, you should change the chain, cassette AND chainring, which is why it's best to regularly change your chain: this stops you having to replace your entire drive train.

Try to use all the different cogs on the cassette or a gentler assistance mode when riding. It is very common for users to need to replace their entire cassette because the small cog is worn out prematurely due to an assistance mode that is too often in turbo mode, or because the small cog is too worn compared to the others).
REMEMBER: electrical-assistance bikes need a reinforced chain.

Rockrider e-ST900 Electric Mountain Bike
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Spare parts

Need to replace a part on your bike? You'll find all our spare parts for the ACTV 500 bike right here.

Rockrider E-ACTV 900

DECATHLON workshops

Each Decathlon store has a workshop for servicing and/or repairing your bike. Here are all the services provided by our trained technicians to help you out:

Rockrider e-ST900 Electric Mountain Bike

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Commitments

DECATHLON offers a lifetime warranty on the frame, fork, handlebar and stem subject to the bike being used under normal conditions. All other components (battery, electrical components, and mechanical components excluding wearing parts) and labour come with a 2-year warranty from the purchase date.