OKAI Stride EB40 Electric Bike

1. Introduction

Thank you for purchasing the OKAI electric bike. OKAI sincerely hopes that you can ride the bike safely and enjoy a comfortable riding experience. Since riding a bike carries certain risks, please read this practical manual carefully before riding, and adequately prepare before going on the road. Please keep the instruction manual in case you need it from time to time. If you give the electric bike to others, please also provide them with this user manual. Failure to comply with this user manual may cause serious injury to people or cause damage to the product. OKAI does not assume any responsibility for this. In order to be concise and easy to read, the OKAI E-Bike will be referred to as “product” in the following content.

Manufacturer's Note: The manufacturer reserves the right to change and release product firmware updates and to keep this manual up to date. Visit https://www.okai.co for the latest information.

1-1. Technical Data

*Specifications are subject to change without prior notice.

*Range: When fully charged, with a load of 75kg, an ambient temperature of 25°C, driving on a flat road with human-assisted.

*Factors affecting the range include: speed, ambient temperature, climbing, number of starts and stops, etc.

1-2. Symbol Explanations

1-3. List of finished product and parts

The electric bike includes the following components:

• Display
• Seven speed shifter
• Headlights
• Brake lever
• Buttons
• Cushion
• Front fender
• Rear fender group
• Front quick release
• 27.5*2.2 in Rear wheel group
• Rear motor
• Pedal
• Front and rear disc brake

Size: length 1880*width 543*height 1100mm

2. Intended Use

An electric bike is intended for sport and entertainment purposes, not for use as a means of transportation. However, its use in public areas is permitted by local laws and regulations. Driving strictly in accordance with the instructions in this manual is crucial for ensuring the safety of yourself and others, and for compliance with national traffic laws and regulations.

When riding in public areas, be aware of potential risks caused by illegal driving, improper operation by others, or other vehicles. Similar to walking or riding a bicycle, injuries can occur. Faster speeds require longer braking distances, and emergency braking on smooth surfaces can lead to loss of balance or falls. Therefore, vigilance, proper speed, and maintaining a safe distance from others and vehicles are essential. When driving on unfamiliar terrain, stay alert and drive at a low speed.

Respect pedestrians' right of way and avoid frightening them, especially children.

In regions without specific national standards for electric bikes, adhere to the safety requirements in this manual. Zhejiang Okai Vehicle Co., Ltd. is not liable for any financial losses, injuries, legal disputes, or other unfavorable events resulting from violations of these recommendations.

To prevent potential injury, do not lend the electric bike to individuals who cannot operate it. If lending the bike, ensure the borrower is taught proper operation and advised to wear protective equipment.

Perform a basic inspection of the electric bike before each ride. If loose parts, significantly reduced battery life, excessively worn tires, abnormal steering noises, or malfunctions are detected, stop using the bike immediately and do not force it to drive.

3. Safety Instructions

3-1. Safety instructions

This product can be dangerous if not used correctly. Learn to use the product step by step and practice sufficiently. Follow all tips and warnings in this manual to reduce the risk of injury. Even with practice and expertise, loss of control, collisions, or falls can occur, potentially causing serious harm.

1. Keep these printed instructions for future reference and read them carefully before use.
2. Maximum speed allowed: 25 km/h (15 mph).
3. Pregnant women, individuals with disabilities, and those with heart, head, back, or neck conditions (or who have had surgery on these areas) should not use this product.
4. Do not use this product after consuming alcohol, sedatives, or psychoactive drugs.
5. Maintain a distance of at least 1m (3ft) from pedestrians, other vehicles, and obstacles.
6. This product should only be used when environmental conditions permit and the personal safety of bystanders is guaranteed.
7. Pay attention to obstacles in front and at a distance.
8. This product is designed for single-person use only. Do not ride with others. Avoid sharp turns at high speeds.
9. Avoid sudden acceleration or braking. Do not lean your body for acceleration.
10. Excessive forward or backward leaning is strictly prohibited.
11. Do not misuse this product. Avoid using it on roadsides, ramps, skate parks, empty swimming pools, or similar sliding surfaces.
12. Do not use this product to cross obstacles, slopes, ice, or snow, or to climb/descend steep slopes, stairs, or escalators. Do not expose the product to rain.
13. Do not use this product in puddles deeper than 10cm (3.94in) as water may enter the motor.
14. Do not jump on this product or attempt acrobatics or unintended activities.
15. To avoid distraction while riding, do not wear earphones, answer calls, take pictures, or engage in other non-riding activities. Always maintain awareness of your surroundings.
16. Hold both handlebars firmly while riding.
17. Avoid using the product at night or in low-visibility conditions.
18. When encountering pedestrians or obstacles, ensure safe passage.
19. Use the product and its accessories within the recommended temperature range. Pay attention to battery charging temperature requirements.
20. Always wear appropriate personal protective equipment (wrist, knee, head, and elbow protection) suitable for your size and weight to prevent injury. Local regulations may mandate helmet use in certain areas. Safety mirrors are also recommended.
21. According to French traffic rules, reflective clothing and a helmet are strongly recommended when riding.
22. Do not hang other products or vehicles from this product.
23. When not in use, park the product using the kickstand.
24. Adding any load to the handlebars will affect the bike's stability.
25. WARNING: Braking distance increases in humid conditions.
26. WARNING: Mechanical parts are subject to stress and wear. Different materials and parts may react differently. If a component exceeds its service life, it may break suddenly, causing injury. Cracks, scratches, and discoloration in stressed areas indicate that a component has exceeded its service life and should be replaced.
27. To prevent theft, use a physical lock when the bike is not in use.
28. WARNING: Risk of Fire and Electric Shock – No User Serviceable Parts.
29. Prolonged exposure to UV rays, rain, and elements can damage enclosure materials. Store indoors when not in use.

Failure to use common sense and heed these warnings may increase the risk of serious injury or death. Be careful!

3-2. Battery safety precautions

• The battery should not be exposed to excessive heat (sunlight, fire, etc.) due to the risk of explosion.
• If the product is not used for more than 30 days, fully charge the battery.
• Fully charge the battery every 90 days to prevent self-discharge and damage.
• If the battery emits a strong smell or becomes hot, stop using the product immediately. Do not open the product casing or attempt to disassemble the battery yourself.
• Dispose of the battery correctly and safely.

3-3. Safety instructions for battery charger

• Use only the original battery charger provided with the product.
• The battery charger is not suitable for children under 14 years old, individuals with mental disorders, or those with disabilities, unless supervised or instructed by a guardian.
• Check the power plug and cable for damage. If damaged, they must be replaced by the manufacturer, a designated service agent, or a similarly qualified person.
• Before cleaning, storage, or transportation, disconnect the battery charger from the power source and allow it to cool down.
• Protect electrical components from moisture. Do not immerse the battery charger in water or other liquids to avoid electric shock. Ensure the charging area is well-ventilated. Disconnect the charger from the power source immediately after the battery is fully charged.
• Regularly check the battery charger for damage. Damaged chargers must be repaired before use. Do not use a charger that has been left exposed for a long time or is damaged.
• Do not connect a damaged product to the battery charger, as this poses a risk of electric shock.
• Do not disassemble the battery charger. Repairs must be performed by authorized personnel. Incorrect assembly may cause fire or electric shock.
• Do not use the charger near flammable or explosive items, as this poses a risk of fire and explosion.
• Check the technical data before connecting the battery charger to the power source. Improper use may cause fire. The battery charger should only be used indoors.
• Do not misuse the battery charger. It is designed only for this product. Use with other products may cause fire or electric shock.
• Ensure the battery charger and charging port are properly connected and free of foreign objects.
• Keep the charging port clean, dry, and free from dust and humidity. Do not place objects on the battery charger or cover it, as this may cause overheating.
• Do not place the battery charger near heat sources.
• Ensure the power line is placed where it cannot be tripped on, stepped on, or damaged to prevent material damage and personal injury.
• Do not disconnect the battery charger by pulling the power line; always remove the plug manually.
• Do not attempt to charge non-rechargeable batteries.

4. How to Use

4-1. Installation Instructions

This section provides information on how to use the product correctly. Following these instructions is important for user safety and product service life.

Tools Required:

• Toolkit (provided)
• Hex screwdriver
• No.15 wrench

1. Cut the packing straps and remove the white plastic buckle under the package.
2. Open the box and remove the top three pieces of foam to access the accessories box.
3. Lift the carton and take out the rear wheel fixed foam.
4. Take out the front wheel.
5. Install the handlebar: Tighten M5 screws with a hex screwdriver and connect the wiring terminal.
6. Remove the vehicle from the packaging and put down the kickstand.
7. Install fenders: Tighten M5 and M6 screws with a hex screwdriver.
8. Remove the protection stents and disc brake protection plates.
9. Front wheel installation: Align the front wheel hub with the front fork. Insert the quick release skewer into the front wheel hub and tighten it.
10. Install pedals: Tighten with a No.15 wrench.
11. Wear a helmet and protective gear.
12. Long press the power button; the display screen will light up, indicating a successful startup.
13. Check that the brake levers are working properly.
14. Stand with one foot on the pedal and the other on the ground, then start to glide.
15. Place your other foot on the pedal to keep your feet steady. Focus and maintain balance. Step on the pedal for acceleration. For safety, the motor will not engage until the bike reaches 3.1 MPH (5 km/h).
16. To reduce speed, stop pedaling and squeeze the brake levers (left brake lever controls front wheel braking, right brake lever controls rear wheel braking).
17. To change the center of gravity while turning, turn the handlebar slightly.

4-2. Charging the battery

Charger Connector:

• Connect the charger to the vehicle charging port and plug it into a power source.

Note: For first use, please connect the charger to activate the vehicle.

Function Buttons:

• Power button: Long press to power on/off.
• Light button: Press once to turn headlights on/off (when the bike is powered on).
• Gear button: Press '+' or '-' to adjust gears 0-3 and the pedestrian gear.
• 0 gear: Motor will not output power.
• 1-3 gear: Motor power increases gradually.
• Pedestrian gear: Press '-' in 0 gear to enter pedestrian gear. Long press '-' to make the motor output power, suitable for use on pavement.

NFC Key:

• Use the NFC icon side of the folding key to touch the display, or press the power button on the handlebar to power on.

4-3. Ride preparation

Checklist:

• Wheels: Ensure wheels are not damaged or excessively worn.
• Loose parts: Verify all parts, nuts, bolts, and fasteners are secure. Ensure no abnormal sounds are produced.
• Operating area: Ensure the operating area is open, flat, and free of obstacles.
• Laws and requirements: Comply with all local laws and regulations, especially when riding on public roads.
• Safety equipment: Always wear personal protective equipment (wrist, knee, head, and elbow protection). Helmets may be required by local laws.

WARNING: Do not ride with one hand. Do not attempt stunts or tricks while riding.

WARNING: Driving at a moderate speed increases mileage. Driving at high speed for extended periods, frequent starting, stopping, idling, acceleration, and deceleration will reduce mileage.

WARNING: Do not touch brake parts with your hands after continuous braking, as they may be hot.

5. Maintenance, Cleaning and Service

5-1. Maintain

Follow the maintenance SOP provided by the company for this product and its accessories. For questions or issues, please contact the company.

5-2. Clean

• Turn off the product before cleaning.
• Unplug the battery charger from the product before each cleaning.
• Never use solvents, abrasive cleaners, stiff brushes, metal, or sharp objects for cleaning, as this can seriously damage the product's appearance and internal structure.
• Clean the battery charger and product with a slightly damp cloth. Afterwards, wipe all parts with a dry cloth.
• WARNING: Do not immerse the product or battery charger in water or other liquids. Do not place the product or battery charger under running water, as this creates a risk of electric shock.
• WARNING: This product cannot be cleaned using a power washer.

5-3. Storage and transportation

• Store the product in a dry, clean place, out of the reach of children, preferably in its original packaging.
• Turn off the product during transportation.
• The product must be shipped in its original packaging. Retain the packaging for future shipping needs. Protect the product during transport (e.g., using bungee straps) to prevent it from falling or tipping over, and to protect it from impact and vibration.
• WARNING: This product contains a built-in lithium battery. Lithium-ion batteries are considered dangerous goods for transport and may only be transported in accordance with local laws and regulations.
• If you plan to travel by plane or other means of transportation with your product, please check with your transportation company regarding the feasibility of product transportation.

6. Handling

This mark indicates that this product should not be disposed of with other household waste. To prevent potential harm to the environment or human health from uncontrolled waste disposal, it is the user's responsibility to recycle this product to promote the sustainable reuse of material resources. To dispose of the used product, please contact the recycling system or the retailer. They can recycle this product in an environmentally and safe manner.

Dispose of batteries in accordance with environmental protection requirements. Do not discard batteries with daily garbage. Contact your community's recycling system or the retailer where you purchased the product.

Packaging materials can be returned for raw material circulation. Dispose of packaging materials in accordance with legal regulations. Relevant information can be obtained from your community's recycling system.

7. Explanation of Error Codes