1. Product Overview
The Murf Electric Bikes Fat Murf is a trailblazing electric beach cruiser designed for a fun, reliable, and effortless riding experience. It features a robust 52-volt battery and a powerful motor, providing ample torque and capacity for extended rides across various terrains. This model is available in a step-through frame, making it accessible for a wide range of riders.

Figure 1.1: The Fat Murf Step-Thru Electric Bike in Bone color, showcasing its fat tires and step-through frame.
Key Features:
- 52V Battery for Range & Speed: The 52-volt battery with a 20aH motor delivers 1000 watts, propelling the bike up to 25 MPH and offering a maximum range of 50 miles. This power assists in climbing hills and steep roads efficiently.
- Class 2 or 3 Selectable: Easily switch between Class 2 and Class 3 operation. The 7-speed drivetrain ensures smooth gear shifts when pedaling.
- Wide Rider Compatibility: Designed to fit riders from 5'2" to 6'6" tall. Seat height adjusts from 34" to 40", and handlebar height adjusts from 44" to 48".
- Safety and Bike Features: Equipped with Tectro Hydraulic Brakes for reliable stopping power. Features 26 x 4 inch wide nubby fat tires for off-road and sand terrain, an integrated LED light with 720 Lumens, and a high-resolution display screen to track speed, battery level, power output, and other metrics.
- Compatible Accessories: Murf Electric Bikes offers various accessories like cargo trailers, rear rack bags, and seat pads to enhance utility.
2. Setup and Assembly
The Fat Murf E-Bike requires some assembly upon arrival. Please follow the included assembly instructions carefully. Ensure all components are securely fastened before your first ride.
Initial Steps:
- Unboxing: Carefully remove all components from the packaging. Retain packaging for future transport or storage.
- Handlebar Installation: Attach the handlebars to the stem, ensuring they are centered and tightened securely.
- Pedal Attachment: Identify left (L) and right (R) pedals. Thread them into the crank arms. Note that the left pedal is reverse-threaded.
- Battery Installation: Insert the 52V battery into its designated compartment on the frame. Ensure it clicks into place securely.
- Initial Charge: Fully charge the battery before the first use. Connect the charger to the bike's charging port and then to a power outlet. The charging indicator will show when charging is complete.
- Tire Inflation: Inflate the fat tires to the recommended pressure, typically found on the tire sidewall.
3. Operating Your Fat Murf E-Bike
Understanding the controls and features of your Fat Murf E-Bike is essential for a safe and enjoyable ride.
E-Bike Classifications:

Figure 3.1: E-Bike Classifications. The Fat Murf can operate as a Class 2 or Class 3 e-bike.
- Class 2: Provides pedal assist and throttle up to 20 MPH.
- Class 3: Provides pedal assist up to 25 MPH. The throttle is disabled in Class 3 mode.
You can switch between Class 2 and Class 3 modes using a simple switch on the bike's controls.
High-Resolution Display:

Figure 3.2: The high-resolution display provides real-time information about your ride.
The integrated high-resolution display screen allows you to easily track vital metrics:
- Battery Level: Indicates remaining battery charge.
- Speed: Current riding speed.
- Distance: Total distance traveled.
- Power Output: Shows the motor's current power usage.
- Pedal Assist Level: Adjust the level of motor assistance while pedaling.
Riding Tips:
- Always wear a helmet and appropriate safety gear.
- Familiarize yourself with local e-bike regulations.
- Start with a low pedal assist level to get accustomed to the bike's power.
- Use the gears in conjunction with pedal assist for optimal efficiency and comfort.
- Be mindful of your surroundings and other road users.
Video 3.1: "Garden Days with Fat Murf" - This video demonstrates the Fat Murf E-Bike in various daily scenarios, including commuting, shopping, and family outings, highlighting its versatility and utility with accessories like a cargo trailer.
4. Maintenance Guidelines
Regular maintenance ensures the longevity and optimal performance of your Fat Murf E-Bike.
Battery Care:
- Charge the battery regularly, even if not in use, to maintain its health.
- Avoid completely draining the battery before recharging.
- Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures.
- Use only the official Murf charger provided with your bike.
General Maintenance:
- Tires: Check tire pressure before each ride. Inspect tires for wear, cuts, or punctures.
- Brakes: Regularly inspect brake pads for wear and ensure brake levers provide firm and responsive braking. Adjust as needed.
- Chain: Keep the chain clean and lubricated to ensure smooth gear changes and prevent rust.
- Fasteners: Periodically check all bolts and nuts for tightness, especially on critical components like handlebars, wheels, and seat post.
- Cleaning: Clean your e-bike with a damp cloth and mild soap. Avoid high-pressure washing directly on electrical components.
5. Troubleshooting Common Issues
This section addresses common issues you might encounter with your Fat Murf E-Bike.
| Problem | Possible Cause | Solution |
|---|---|---|
| Bike not turning on | Battery not charged or not properly seated; power button not pressed correctly. | Ensure battery is fully charged and securely installed. Press and hold the power button for a few seconds. |
| Motor not engaging | Pedal assist level too low; brake levers engaged; loose motor connection. | Increase pedal assist level. Release brake levers. Check motor cable connections. |
| Battery not charging | Charger not connected properly; faulty charger or outlet; battery issue. | Verify charger connection to bike and outlet. Try a different outlet. Contact customer support if issue persists. |
| Unusual noises | Loose components; dry chain; brake rub. | Inspect all bolts and nuts. Lubricate the chain. Adjust brake calipers if rubbing. |
For issues not listed here or if solutions do not resolve the problem, please contact Murf Electric Bikes customer support.
6. Technical Specifications

Figure 6.1: Size and Specifications overview of the Fat Murf Step-Thru.
| Specification | Detail |
|---|---|
| Bike Type | Electric Bike |
| Model Name | Fat Murf ST |
| Model Number | EB-FMST-BN-UL |
| Brand | MURF |
| Color | Bone |
| Age Range (Description) | Adult |
| Number of Speeds | 7 |
| Wheel Size | 4 Inches |
| Frame Material | Alloy Steel |
| Suspension Type | Rear |
| Special Feature | Rechargeable, Speedometer, 25 Mph Speed, 750W Power, 30-50 Miles Range |
| Included Components | E Bike Accessory Kit, Electric Bike, Charger |
| Brake Style | Disc |
| Specific Uses For Product | Beach, Off-Road |
| Item Weight | 5300 Grams |
| Style | Step-thru |
| Power Source | Electric motor (rechargeable battery) |
| Lithium Battery Energy Content | 1040 Watt Hours |
| Assembly Required | Yes |
| Bicycle Gear Shifter Type | Twist Grip |
| Minimum User Height | 34 Inches |
| Bicycle Drivetrain Type | Derailleur |
| Item Dimensions LxWxH | 80.5 x 30 x 48 inches |
7. Warranty and Support
Warranty Information:
The Murf Electric Bikes Fat Murf E-Bike comes with a 2-Year Warranty. This warranty covers manufacturing defects and ensures your peace of mind. Please refer to the full warranty details provided with your purchase for specific terms and conditions.
Customer Support:
For any questions, technical assistance, or warranty claims, please contact Murf Electric Bikes customer support. You can also refer to the official Certificate of Compliance for additional product information.
- Certificate of Compliance (PDF): Download Here