Introduction
The Gotrax Dolphin 26" Electric Bike is designed for urban commuting and leisure riding, offering a blend of power, comfort, and versatility. It features a 350W brushless motor with a peak power of 500W, providing a maximum speed of 20 MPH. The 280.8Wh removable battery allows for up to 15.5 miles in pure electric mode and over 30 miles with pedal-assist. Key features include 5 pedal-assist levels, a 7-speed Shimano gear system, front suspension, and dual disc brakes for enhanced safety and control.

Figure 1: Gotrax Dolphin Electric Bike in action, highlighting its sleek design and urban usability.
Setup
The Gotrax Dolphin electric bike is designed for easy assembly, with most of the work pre-done. Clear instructions and necessary tools are provided in the package.
Battery Installation and Removal
The bike features a removable battery for convenient charging. To remove the battery, insert the key into the lock, turn it, and press the release button. The battery will slide out. To reinstall, align the battery with the frame slot and push until it clicks into place. The key is only required for battery removal, not for operating the bike.

Figure 2: Steps for easy battery installation and removal.
Adjusting Handlebars and Seat
The handlebars and seat are adjustable to ensure personalized comfort for riders of various heights. Adjust the seat height using the quick-release lever on the seat post. The handlebar angle can also be adjusted for an ergonomic riding posture.

Figure 3: Adjustable comfort seat for customized riding.

Figure 4: Easy-to-grasp adjustable handlebars for customized ride.
Operating the Electric Bike
Riding Modes
The Gotrax Dolphin offers three distinct riding modes:
- Pure Electric Mode: Utilizes the motor for propulsion without pedaling.
- Pedal-Assist Mode (PAS): Provides motor assistance while you pedal, with 5 adjustable levels of support.
- Normal Bike Mode: Ride the bike like a traditional bicycle without any electric assistance.
Control Panel and Pedal-Assist Levels
The control panel on the handlebar allows you to power the bike on/off, select pedal-assist levels (1-5), and activate the headlight (if installed). The panel features LED indicators for battery level and the current PAS mode.

Figure 5: Key performance metrics and riding modes.
Boost Mode
For an extra push, especially on inclines or when you need a quick burst of speed, activate the Boost Mode. Press and hold the designated button for 2-3 seconds to engage a 6 Km/h (3.7 mph) boost. This feature helps reduce riding fatigue and maximize distance.

Figure 6: Utilizing Boost Mode for easier uphill travel.
7-Speed Gear System
The Shimano 7-speed system allows you to adapt to various terrains and riding conditions. Selecting a lower gear minimizes strain on your legs, making it easier to pedal. The thumb shifter provides smooth and easy gear changes.

Figure 7: The 7-speed gear system for versatile riding.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your Gotrax Dolphin electric bike.
Battery Care
- Charge the 280.8Wh battery fully before first use.
- A full charge typically takes 5.5 hours with the provided 1.8A charger.
- Avoid completely draining the battery to prolong its lifespan.
- Store the battery in a cool, dry place when not in use.
General Maintenance
- Regularly check tire pressure (26" x 2.1" tires).
- Inspect dual disc brakes for proper function and wear.
- Keep the chain clean and lubricated.
- Ensure all bolts and fasteners are tightened securely.
- Clean the bike regularly with a damp cloth; avoid high-pressure washing.
Troubleshooting
If you encounter issues with your Gotrax Dolphin electric bike, consider the following common troubleshooting steps:
- No Power: Check if the battery is fully charged and properly seated in the frame. Ensure the power button on the control panel is pressed.
- Motor Not Assisting: Verify that you are in Pedal-Assist mode (PAS) and not in Normal Bike mode. Check the PAS level on the control panel.
- Brake Issues: Inspect the brake cables for tension and ensure the brake pads are not worn out. Adjust as needed.
- Gear Shifting Problems: Ensure the derailleur is properly aligned. Minor adjustments may be needed.
- Unusual Noises: Check for loose components, rubbing parts (e.g., brakes), or debris in the drivetrain.
For more detailed troubleshooting or persistent issues, please refer to the official user manual PDF or contact Gotrax customer support.
Specifications
| Feature | Detail |
|---|---|
| Bike Type | City Bike, Electric Bike |
| Age Range (Description) | Youth, Adult |
| Brand | Gotrax |
| Number of Speeds | 7 |
| Color | White |
| Wheel Size | 26 Inches |
| Frame Material | Aluminum |
| Suspension Type | Front Shock Absorbing Fork |
| Included Components | Reflectors |
| Size | 26inch |
| Brake Style | Dual disc brake |
| Style | 350w White |
| Model Name | Dolphin |
| Power Source | Rechargeable Battery |
| Wattage | 350 watts |
| Wheel Material | Aluminum |
| Lithium Battery Energy Content | 280.8 Watt Hours |
| Seat Material Type | Faux Leather |
| Warranty Type | 365 Days |
| Maximum Weight Recommendation | 264 Pounds |
| Assembly Required | Yes |
| Bicycle Gear Shifter Type | Trigger |
| Is Autographed | No |
| UPC | 810132393587 |
| Bicycle Drivetrain Type | Derailleur |
| Electric Assist Type | Pedelec, Throttle-on-demand |
| Manufacturer | ZHE JIANG TAOTAO VEHICLES CO.,LTD |
| Item Package Dimensions L x W x H | 56 x 30 x 9 inches |
| Package Weight | 28.58 Kilograms |
| Item Dimensions LxWxH | 70.1 x 27.2 x 46.1 inches |
| Brand Name | Gotrax |
| Warranty Description | 365 days |
| Material | Aluminum+ABS |
| Suggested Users | unisex-adult |
| ASIN | B0CG98MN9Z |
| Date First Available | August 22, 2023 |
Warranty and Support
The Gotrax Dolphin Electric Bike comes with a 365-day part assurance. For any problems or inquiries, please contact Gotrax customer support. You can also refer to the official User Manual (PDF) for detailed information.
Safety Guidelines
Your safety is our priority. The Gotrax Dolphin Electric Bike is UL2849 safety certified. Always wear a helmet and appropriate safety gear when riding. Adhere to local traffic laws and regulations. Perform regular safety checks on brakes, tires, and other components before each ride.





