RANDRIDE YG70 Electric Bicycle User Manual

1. Important Safety Warnings

⚠️ Please mind potential fire risk and strictly follow the instruction manual for charging and storage. While using the product, please wear protective equipment and fully comply with the applicable law and regulations.

• Always wear a helmet and appropriate safety gear when riding.
• Familiarize yourself with local e-bike laws and regulations before riding.
• Perform a pre-ride safety check before each use, including brakes, tire pressure, and battery level.
• Do not operate the e-bike under the influence of alcohol or drugs.
• Be aware of your surroundings and ride defensively.

2. Product Overview

The RANDRIDE YG70 is a versatile electric bicycle designed for city commuting, featuring a powerful 1000W motor and a long-lasting 48V 14Ah lithium-ion battery. It offers multiple riding modes to suit various preferences and terrains.

Key Features:

• Motor: 1000W Brushless High-Speed Motor
• Battery: 48V 14Ah Large Capacity Removable Lithium-Ion Battery
• Tires: 27.5 x 1.95 inch for urban roads
• Max Speed: Up to 45 km/h
• Range per Power: 31 - 60 km (Pure electric mode: ~50KM, Electric power assist mode: 70-80KM)
• Brakes: Mechanical Disc Brakes
• Transmission: 27-Speed (3 front, 9 rear)
• Frame Material: Aluminum Alloy 6106
• Display: Intelligent LCD Display
• Suspension: Front Fork Suspension
• Safety: High Brightness Headlights, Safety Warning Taillights

3. Specifications

4. Assembly and Setup

Your RANDRIDE YG70 electric bicycle comes partially assembled. Follow these general steps for final assembly. It is recommended to have a qualified bicycle mechanic perform the final checks.

1. Unpacking: Carefully remove the bicycle and all components from the packaging. Retain packaging for potential future transport or returns.
2. Handlebar Installation: Attach the handlebar to the stem, ensuring it is centered and tightened securely.
3. Front Wheel Installation: Install the front wheel, ensuring the quick-release skewer or axle nuts are properly tightened. Verify the brake rotor is correctly seated in the caliper.
4. Pedal Installation: Identify left (L) and right (R) pedals. Apply a small amount of grease to the threads and screw them into the crank arms. Remember, the left pedal is reverse-threaded. Tighten firmly.
5. Seat Post and Saddle: Insert the seat post into the frame and adjust the saddle height for comfortable riding. Ensure the quick-release clamp is securely fastened.
6. Fenders and Rack: Attach the front and rear fenders, and the rear rack, using the provided hardware.
7. Initial Charge: Fully charge the battery before your first ride. Refer to the 'Battery Care & Charging' section.
8. Pre-Ride Check: Before your first ride, and periodically thereafter, perform a thorough safety check:
   • Check tire pressure (refer to tire sidewall for recommended PSI).
   • Test front and rear brakes for proper function.
   • Ensure all bolts and quick releases are tight.
   • Verify lights are working.

5. Operating Instructions

5.1 Power On/Off

To power on the e-bike, press and hold the power button on the intelligent LCD display. To power off, press and hold the power button again until the display turns off.

5.2 Riding Modes

The RANDRIDE YG70 offers three riding modes:

• Riding Mode: Turn off the power for pure sports cycling (0 gear). This mode operates like a traditional bicycle.
• Electric Mode: Turn on the power and use the twist throttle for pure electric riding (1-5 gears). No pedaling required.
• Assisted Mode: Turn on the power and select a gear (1-5) for intelligent power intervention. The motor provides assistance as you pedal.

5.3 Gear Shifting

The e-bike features a 27-speed transmission system (3 front gears, 9 rear gears). Use the shifters on the handlebar to change gears according to terrain and desired speed. Shift smoothly to avoid strain on the drivetrain.

5.4 LCD Display Functions

The intelligent LCD display provides essential riding information:

• Speed: Current riding speed.
• Gear Position: Current assist level (1-5) or 0 for no assist.
• Mileage: Total distance traveled or trip distance.
• Electricity Level: Battery charge indicator.

5.5 Lighting

The e-bike is equipped with high brightness headlights and safety warning taillights for visibility. Ensure they are functioning correctly, especially when riding in low-light conditions.

6. Battery Care & Charging

The RANDRIDE YG70 is powered by a 48V 14Ah Lithium-Ion battery, equipped with a Battery Management System (BMS) offering 8 protections for safety and longevity.

• Charging: Use only the provided 48V 2A charger. Connect the charger to the battery charging port, then plug it into a power outlet. The indicator light on the charger will show charging status (usually red for charging, green for fully charged).
• Charging Time: Allow sufficient time for a full charge, typically several hours.
• Storage: Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures. If storing for an extended period, charge the battery to 50-70% and check it periodically.
• Removal: The battery is removable for convenient charging or storage. Follow the instructions in your full manual for safe removal and re-installation.
• Safety: Do not expose the battery to water or fire. Do not puncture or attempt to disassemble the battery pack.

7. Maintenance

Regular maintenance ensures the longevity and safe operation of your RANDRIDE YG70 e-bike.

• Brakes: Regularly check the mechanical disc brakes for wear on pads and rotors. Ensure brake levers are responsive and provide adequate stopping power. Adjust as needed.



• Tires: Maintain correct tire pressure (check sidewall for PSI). Inspect tires for wear, cuts, or punctures. The 27.5 x 1.95 inch tires are designed for urban roads.



• Motor: The 1000W brushless motor is generally low maintenance. Keep it clean and free from debris.



• Chain and Drivetrain: Keep the chain clean and lubricated. Inspect gears and derailleur for proper alignment and function.
• Frame and Components: Regularly clean the aluminum alloy frame. Check all bolts, nuts, and quick releases for tightness. Inspect the front fork suspension for smooth operation.



• Electrical Connections: Ensure all electrical connections are secure and free from corrosion.

8. Troubleshooting

This section addresses common issues you might encounter with your RANDRIDE YG70 e-bike.

• E-bike not powering on:
  – Check if the battery is properly seated and locked.
  – Ensure the battery is charged.
  – Verify all electrical connections are secure.
• Motor not assisting:
  – Check the battery level on the LCD display.
  – Ensure you are in Electric or Assisted mode (not Riding Mode).
  – If in Assisted mode, ensure you are pedaling.
• Brakes feel weak:
  – Inspect brake pads for wear and replace if necessary.
  – Check brake cables for tension and adjust if loose.
  – Ensure brake calipers are aligned correctly.
• Unusual noises:
  – Check for loose components (bolts, spokes, fenders).
  – Lubricate the chain if it's squeaking.
  – If noises persist, consult a professional bicycle mechanic.
• Display not working:
  – Check power connection to the display.
  – Ensure the main battery is on and charged.

9. User Tips

• Regular Charging: For optimal battery life, avoid completely draining the battery. Charge it regularly, even if not fully depleted.
• Tire Pressure: Maintaining correct tire pressure not only improves ride efficiency but also reduces the risk of punctures.
• Gear Selection: Use lower gears for climbing hills and higher gears for flat terrain to maximize motor efficiency and battery range.
• Brake-Throttle Coordination: When using the throttle, be mindful of your braking. Release the throttle before applying brakes.
• Security: Always secure your e-bike with a robust lock when unattended.

10. Warranty and Support

10.1 Warranty Information

RANDRIDE provides a 1-year warranty covering parts and labor for quality issues. Free replacement is offered for quality issues. Please note that some human-caused damage may require a shipping fee for repairs. Tire punctures are not covered by the warranty.

10.2 Customer Support

For any questions, troubleshooting assistance, or warranty claims, please contact RANDRIDE customer service. You can typically find contact information on the seller's platform or the official RANDRIDE website.