Brake rotors are metal discs affixed to each wheel hub that runs between the brake pads of the bicycle frame's brake calipers. When the brake lever is squeezed, the mechanical brake cable pulls on the caliper arm, which squeezes the brake pad against the brake rotor. Friction between the brake pads and disc slows down the wheels and bike.
With normal use, brake pads wear out and need to be replaced to maintain the ability to stop your bike safely. On a less frequent basis, or in the unlikely event that the disc brake rotor becomes bent or damaged, the brake rotor may need to be replaced.
Replacing a brake rotor is essential maintenance for ensuring safe bicycle operation. Here's a guide on disassembling and installing a new brake rotor:
Tools Required:
New brake rotor
18mm wrench
Allen wrench (hex wrench)
Ties (for securing motor wires)
Steps:
Prepare the Bike for Maintenance: Turn off the bike and remove the battery.
Invert the Bike: Carefully flip the bike upside down.
Remove the Wheels:
For the rear wheel, start by cutting the ties securing the motor wires, and disconnecting the motor wire. Use an 18mm wrench to carefully loosen and remove the bolts securing the wheel.
For the front wheel, utilize the quick-release mechanism (for spoked wheels) or an 18mm wrench to loosen and remove the wheel (for solid wheels).
Take Off the Rotor: Use an Allen wrench to carefully remove the bolts securing the rotor.
Replace the Brake Rotor: Install the new rotor and reattach the bolts securely.
Reassemble the Wheel: Reinstall the wheel, ensuring it's properly aligned, and secure it using the wrench or quick-release mechanism. Reconnect the motor wire and use ties to secure it.
Reinstall the Battery: Place the battery back in its position.
Test the Bike: Before riding, test the bike to ensure everything is functioning correctly.
Following these steps will help maintain your bike's braking system and ensure safe riding.