cysum Cityrun Electric Bike User Manual

1. Introduction

Welcome to the user manual for your new cysum Cityrun Electric Bike. This manual provides essential information for the safe and efficient operation, assembly, maintenance, and troubleshooting of your electric bicycle. Please read this manual thoroughly before your first ride and keep it for future reference.

The cysum Cityrun Electric Bike is designed for urban commuting and leisure rides, offering a comfortable and efficient experience.

2. Safety Information

Your safety is paramount. Adhere to the following guidelines to ensure a safe riding experience:

• Always wear a certified helmet when riding.
• Perform a pre-ride inspection: check tire pressure, brake function, battery level, and ensure all quick releases are secure.
• Obey all local traffic laws and regulations.
• Do not ride under the influence of alcohol or drugs.
• Be aware of your surroundings and ride defensively.
• Do not exceed the maximum weight capacity of the bike.
• Ensure the battery is charged in a well-ventilated area, away from flammable materials.

3. Product Overview

Familiarize yourself with the main components of your cysum Cityrun Electric Bike:

The cysum Cityrun Electric Bike features a sturdy frame, front basket, and rear rack.

• Frame: Durable carbon structural steel frame.
• Motor: 250W brushless motor, providing assistance up to 25 km/h.
• Battery: 36V 10Ah lithium battery, integrated into the frame for a sleek design.


The 36V 10Ah lithium battery is neatly integrated into the bike's frame.

• Display: Handlebar-mounted screen showing speed, mileage, and battery indicator.


The digital display provides essential riding information at a glance.

• Brakes: Front and rear disc brakes for reliable stopping power.
• Gears: 7-speed transmission system for versatile riding.

The 250W motor and 7-speed gear system ensure smooth performance.
• Tires: 26x1.95'' tires for stability and traction.
• Lights: Super bright headlights and tail light for night safety.
• Accessories: Includes a front basket and rear rack for convenience.


The integrated front basket offers convenient storage for personal items.



The sturdy rear rack provides additional carrying capacity.

4. Setup and Assembly

Your cysum Cityrun Electric Bike arrives 85% pre-installed, significantly reducing assembly time. The remaining steps typically include:

1. Handlebar Installation: Secure the handlebar in place and adjust to your preferred riding position.
2. Pedal Attachment: Carefully screw the pedals into the crank arms (note: left and right pedals are distinct).
3. Front Wheel Installation: Attach the front wheel and ensure it is properly aligned and secured.
4. Basket and Rack Attachment: Install the front basket and rear rack using the provided hardware.
5. Battery Charging: Fully charge the battery before your first ride.
6. Pre-Ride Check: Double-check all bolts, connections, and tire pressure before riding.

5. Operating Instructions

5.1 Powering On/Off

To power on the bike, press and hold the power button on the display. Repeat to power off. The display will illuminate, showing current speed, battery level, and pedal assist mode.

5.2 Pedal Assist System (PAS)

The bike features a pedal assist system. As you pedal, the motor provides assistance. Use the '+' and '-' buttons on the display to adjust the level of assistance. Higher levels provide more power, while lower levels conserve battery life.

5.3 Gear Shifting

The 7-speed transmission allows you to adapt to various terrains and inclines. Use the gear shifter on the handlebar to change gears. Shift to a lower gear for climbing hills and a higher gear for flat terrain or downhill riding.

5.4 Braking

The bike is equipped with front and rear disc brakes. Apply both brakes simultaneously and smoothly for effective stopping. Avoid sudden, hard braking, especially at high speeds.

5.5 Lights Operation

The super bright headlights and tail light can be turned on/off via the display or a dedicated button on the handlebar, ensuring visibility during low-light conditions.

6. Maintenance

Regular maintenance ensures the longevity and optimal performance of your electric bike:

• Battery Care: Charge the battery regularly, even if not in use, to maintain its health. Avoid fully discharging the battery. Store the battery in a cool, dry place.
• Tire Pressure: Check tire pressure before each ride. Maintain the recommended PSI (pounds per square inch) indicated on the tire sidewall.
• Brake Inspection: Regularly inspect brake pads for wear and ensure brake levers are responsive. Adjust or replace as needed.
• Chain Lubrication: Keep the chain clean and lubricated to ensure smooth gear changes and prevent rust.
• General Cleaning: Clean the bike regularly with a damp cloth. Avoid using high-pressure washers directly on electrical components.
• Fastener Check: Periodically check all bolts and fasteners to ensure they are tight and secure.

7. Troubleshooting

Here are some common issues and their potential solutions:

If you encounter issues not listed here or require further assistance, please contact customer support.

8. Specifications

Detailed specifications for your cysum Cityrun Electric Bike:

Key dimensions of the cysum Cityrun Electric Bike.

9. Warranty and Support

cysum provides a one-year repair warranty for your Cityrun Pedal Assist Electric Bicycle. If you have any questions, concerns, or require technical assistance, please do not hesitate to contact our customer service team. Please refer to your purchase documentation for specific contact details.