Product Overview
The TST R004 is a 20-inch fat-tire electric bicycle designed for powered riding on paved roads and mixed recreational terrain. This configuration uses an aluminum frame, a 48-volt 15Ah battery system, and an electric motor rated at up to 1,500 watts peak output. Public specifications identify a maximum assisted speed of up to 28 mph and a stated riding range of up to 60 miles under specified conditions.
The bicycle combines pedal-assisted operation with electric propulsion and uses 20-inch wheels with wide tires. The R004 platform also incorporates suspension, disc braking, multiple drivetrain speeds, and an electronic display for riding information. These components place it within the fat-tire electric bicycle category rather than a conventional non-powered bicycle.
Range, speed, and battery endurance vary with rider weight, assistance level, terrain, temperature, tire pressure, wind, and riding style. The R004 is therefore better identified by its electrical system, frame configuration, wheel size, and model designation than by maximum performance figures alone. Public records also associate the R004 family with UL 2849 electrical-system testing.
Product Information
| Field | Value |
|---|---|
| Brand | TST |
| Manufacturer | Shenzhen Uni-chic Technology Co., Ltd. |
| Category | Adult Electric Bicycle / Fat-Tire Electric Bicycle |
| Series | R004 |
| Model | R004 |
| ASIN | B0G9S333GG |
| Material | Aluminum |
| Size | 20-inch |
Product Identifier Summary
Model Number
A model number distinguishes a specific bicycle design within a manufacturer’s product range. It is commonly used when locating manuals, compatible components, technical support information, and replacement parts.
MPN
A Manufacturer Part Number is assigned by a manufacturer to identify a specific product or configuration for inventory and service purposes. A separate verified MPN for this configuration was not established.
UPC
A UPC is a standardized retail barcode used for inventory and product identification. A verified UPC for this exact R004 configuration was not established.
EAN
An EAN is an international retail barcode identifier used in many markets outside North America. No verified EAN was established for this exact configuration.
GTIN
A GTIN is a global product identifier that can include UPC and EAN formats. No independently verified GTIN was established for this specific bicycle configuration.
ASIN
An ASIN is a catalog identifier associated with a specific marketplace product record. It can help distinguish this configuration from other R004 battery, color, or equipment variants.
ISBN
ISBN identifiers are intended for books and certain published media. They do not apply to this electric bicycle.
Common Uses
The R004 is designed for personal electric bicycle transportation and recreational riding. Its wide tires and electric assist system allow it to be used on several common riding surfaces where bicycle access is permitted.
- Urban and suburban transportation
- Recreational neighborhood riding
- Travel on paved bicycle routes
- Riding on gravel and other firm unpaved surfaces
- Moderate trail use where electric bicycles are permitted
- Trips where pedal assistance can reduce rider effort
Maintenance and Care
Routine electric bicycle maintenance includes checking tire pressure, brake operation, wheel security, drivetrain condition, electrical connections, and visible fasteners. Components should be inspected more frequently when the bicycle is used on rough or dirty surfaces.
The battery should be charged with the compatible charging equipment specified for the bicycle. Batteries should be stored in a dry location away from excessive heat, freezing conditions, direct flame, and physical damage.
The frame can be cleaned with a damp cloth and mild cleaning solution when necessary. High-pressure water should not be directed at the battery, display, wiring connections, motor, or other electrical components.
Chain lubrication and brake adjustment should follow the procedures specified in the applicable bicycle documentation. Damaged electrical components should not be opened or repaired without appropriate technical knowledge.
Safety Information
The R004 is a motor-assisted bicycle capable of substantially higher speeds than many conventional bicycles. Riders should become familiar with braking, steering, throttle behavior, and pedal assistance before operating at higher assistance levels.
- Public documentation for the R004 product family identifies electrical-system testing associated with UL 2849.
- Use only a battery and charger intended for the applicable electrical system.
- Do not charge a battery that is swollen, leaking, severely damaged, unusually hot, or otherwise abnormal.
- Inspect brakes, tires, wheels, controls, and fasteners before riding.
- Follow applicable helmet, electric bicycle, traffic, trail, and age regulations.
- Maximum assisted speed settings may affect how the bicycle is classified under local law.
- Keep batteries and charging equipment away from open flame and excessive heat.
- Do not expose electrical connections to high-pressure water.
Technical Specifications
| Specification | Value |
|---|---|
| Bike Type | Electric fat-tire bicycle |
| Model Platform | R004 |
| Peak Motor Output | 1,500 W |
| Battery Voltage | 48 V |
| Battery Capacity | 15 Ah |
| Battery Energy Capacity | 720 Wh nominal |
| Maximum Stated Assisted Speed | Up to 28 mph |
| Maximum Stated Range | Up to 60 miles |
| Wheel Size | 20 inches |
| Tire Width | 4 inches |
| Frame Material | Aluminum |
| Brake Type | Disc brakes |
| Suspension | Dual suspension |
| Drivetrain | Chain drive |
| Number of Speeds | 7 |
| Electric Assistance | Pedal assist and throttle assist |
| Display | LCD display |
| Application Connectivity | Supported |
Product History
The R004 forms part of TST’s range of fat-tire electric bicycles. Public product records for this configuration became available in late 2025, with the model continuing to appear in the company’s electric bicycle range during 2026.
The R004 has also been documented in configurations using different battery capacities. Because battery capacity can materially change range and other characteristics, specifications from another R004 variant should not automatically be applied to this 48V 15Ah configuration.
Key Features
- 20-inch fat-tire electric bicycle platform
- Aluminum frame construction
- Electric propulsion with pedal-assist and throttle-assist operation
- Dual-suspension configuration
- Seven-speed mechanical drivetrain
- Disc braking system
- LCD riding display
- Removable electric bicycle battery system
- Wide tires intended to increase contact area on mixed surfaces
- Electronic application connectivity
Package Contents
Verified package information identifies the electric bicycle and a tool kit as included components. Additional accessories can vary by production batch or configuration and are therefore not listed as standard package contents here.
- TST R004 electric bicycle
- Assembly tool kit
Compatibility
Replacement electrical components should match the R004’s voltage, connector arrangement, controller requirements, and physical mounting system. A battery that appears physically similar is not necessarily electrically compatible.
Tires and tubes must match the bicycle’s wheel diameter and width requirements. Brake pads, drivetrain parts, controls, displays, chargers, and other service components should be matched using the bicycle model and the specifications printed on the original component.
Electric bicycle access varies by jurisdiction and location. Roads, bicycle paths, public lands, and trails can apply different rules based on motor power, maximum assisted speed, throttle capability, or electric bicycle class.
Frequently Asked Questions
How can I identify this TST electric bike?
Check the bicycle frame, product label, battery documentation, or original records for the R004 model designation. Battery capacity should also be checked because multiple R004 configurations exist.
Is the R004 a conventional bicycle?
No. It combines a pedal-driven bicycle drivetrain with a battery, motor, controller, and electric assistance system.
Does the R004 require assembly?
Electric bicycles of this type can require setup and adjustment after shipping. Critical components such as handlebars, brakes, wheels, pedals, controls, and fasteners should be checked before riding even when major assemblies arrive installed.
Can a different 48-volt battery be installed?
Voltage alone does not establish battery compatibility. The replacement must also match the mounting interface, connector, battery-management system, controller requirements, dimensions, and charging system.
Can the bicycle be used on trails?
The fat-tire and suspension design is intended to support mixed riding surfaces. Trail access depends on local rules because some locations prohibit or restrict motor-assisted bicycles.
What material is used for the frame?
Verified product information identifies aluminum as the frame material.
How should the battery be stored?
Store it in a dry, temperature-controlled location away from open flame, excessive heat, water, and physical impact. Follow the battery documentation for long-term charge-level guidance.
Can the bicycle be washed with a pressure washer?
High-pressure washing is not appropriate for sensitive electric bicycle components. Water forced into bearings, connectors, controls, the motor, or battery interfaces can cause damage.
What should be checked before the first ride?
Check wheel attachment, tire inflation, brake function, handlebar security, pedal installation, battery locking, drivetrain operation, and electrical controls. Any shipping-related looseness should be corrected before use.
Does the bicycle have a warranty?
Public records identify limited warranty coverage for the R004, but warranty terms can vary by configuration and date. Current warranty documentation should be checked using the exact model and serial information.
Does maximum range stay the same on every ride?
No. Electric bicycle range changes with assistance level, throttle use, rider and cargo weight, terrain, temperature, wind, tire pressure, acceleration, and battery condition.
Does the maximum speed determine the bicycle’s legal classification?
It can be one factor. Electric bicycle classifications vary by jurisdiction and may also consider motor output, throttle operation, and the speed at which electric assistance stops.
Buying Considerations
The exact R004 configuration should be identified before comparing specifications. Battery capacities and other equipment can differ within the same general model family, which can affect range, weight, charging time, and component compatibility.
Riders should also consider local electric bicycle laws. A bicycle capable of higher assisted speeds may be subject to different access, equipment, licensing, or operating requirements depending on the jurisdiction.
Fat tires and suspension add capability on uneven surfaces but also affect bicycle size, rolling resistance, and handling. Storage space, transportation requirements, stairs, vehicle racks, and available charging locations should therefore be considered.
Service access is another practical factor. Tires, brake pads, chains, batteries, controllers, displays, and other electrical components eventually require inspection or replacement, making accurate model identification important for maintenance.
Customer Feedback Summary
This section is a generalized summary of recurring themes in publicly available customer feedback. Customer comments represent individual experiences and are not verified technical specifications.
Positive feedback commonly discusses motor response, riding speed, the substantial feel of the frame, and the bicycle’s ability to travel across pavement and less even surfaces. Some users also report that the wide seat, fat tires, and suspension contribute to riding comfort.
Assembly and initial adjustment appear as recurring practical considerations. Reports mention that the bicycle’s size and weight can make unpacking or setup easier with assistance, while brake alignment and other minor adjustments may sometimes require attention before regular use.
Battery endurance receives favorable comments in some reports, although real-world range varies widely with riding conditions. Customer service and replacement-part assistance are also mentioned positively in several public accounts.
Common limitations associated with this type of bicycle include greater bulk than a conventional bicycle and the need to understand electrical and mechanical maintenance. These observations should not be interpreted as measurements of product reliability or as guaranteed experiences for every unit.
Related Products
The R004 belongs to a broader group of TST electric bicycles that includes commuter, fat-tire, moped-style, cargo, and full-suspension models. Related models may use different frame designs, wheel sizes, batteries, ranges, or riding configurations.
- TST R002 20-inch full-suspension moped-style electric bike
- TST R9 full-suspension moped-style electric bike
- TST R7 electric cargo bike
- Other TST R004 battery-capacity configurations
- TST fat-tire commuter and off-road electric bicycles
Last Updated
August 16, 2026
iGiftcardz is an independent product information website. We provide original product research, specifications, compatibility information, model numbers, and buying guides based on publicly available information. iGiftcardz is not affiliated with, endorsed by, sponsored by, or associated with any manufacturer, retailer, or marketplace unless expressly stated. Product names, trademarks, and brand names are the property of their respective owners and are used solely for identification and reference purposes.
Review this product
-
Review this product