Speed Unlock Magnet Mount for Rockrider E-ST V3

This simple 3D print lets you bypass the 25 km/h speed limit on your Rockrider E-ST V3 e-bike. It holds a 20x2 mm magnet on your pedal crank, which tricks the bike's computer so it never cuts the motor power.

The Fusion 360 (.f3d) file is included! You can easily change the magnet size or the zip-tie slots. If you need help with this, just ask in the comments!

🛠 What You'll Need

A 20x2 mm round magnet.

4x zip ties. (Note: My zip ties were too short, so I had to combine two to make long ones).

✨ Pro-Tips

For easy switching, you can leave the original magnet on your wheel spoke. To go back to the stock setup, you just have to move the sensor back to its original position.

Always remove this mod before taking your bike in for service or repairs.

👍 The Good Stuff

🚀 Go Faster: Get motor assistance well past the 25 km/h limit.

🔄 Completely Reversible: To go back to normal, just move the speed sensor back to its original spot. No permanent changes!

💰 Super Cheap: A much better solution than buying an expensive electronic tuning chip like a Speedbox.

🚀 Recommended Upgrades

⚙ Unlock Higher Gearing Potential: With the motor unlocked, you can now take full advantage of a bigger front chainring and a longer chain. This lets you pedal effectively at much higher speeds without "spinning out" (pedaling too fast to keep up).

⚠ The Downsides - Please Read!

📊 Inaccurate Speed: Your display will be wrong. It will show a very low speed and won't record the correct distance for your rides.

⚖ Legality & Insurance: This mod is likely illegal for use on public roads in many countries (especially in the EU). In case of an accident, your insurance will likely not cover you.

⚙ Increased Wear & Tear: The motor, battery, and chain are working harder than they were designed to. Expect parts to wear down faster.

🛡 Warranty Void: Using this will void your manufacturer's warranty. Decathlon will not cover repairs on the electronics if they see this mod.

🛑 Safety Risk: Be careful! Your bike's brakes are not designed for high speeds. It will take you longer to stop safely.

Disclaimer: You are downloading and using this model entirely at your own risk. The creator is not responsible for any damage to your bike, personal injury, or legal issues that may result from using this modification. Ride smart and stay safe!