The ARB BASE Rack system is a highly customizable roof rack solution designed for 4WD vehicles, offering flexibility in mounting accessories and cargo. It features a modular design with dovetail extrusion technology, allowing users to attach and reposition accessories with ease. This guide provides detailed insights into the installation process, compatibility, and key features of the BASE Rack system based on the latest manufacturer documentation and user reports.
Overview of the ARB BASE Rack System
The BASE Rack is engineered to provide a versatile, low-profile solution for 4WD owners who require both functional and aesthetic roof rack systems. It supports a wide range of accessories, including awning brackets, gas bottle holders, light bars, and Hi-Lift Jack mounts. The system uses a unique dovetail extrusion that allows for secure and flexible attachment of accessories without compromising cargo space or vehicle aesthetics.
Installation of the BASE Rack involves mounting it to the vehicle using vehicle-specific mounting kits. These kits are designed to attach to OE factory mounting points on the roof, ensuring a secure and durable fit. The BASE Rack also offers compatibility with various guard rail options—full rails, 1/4 rails, 1/2 rails, and trade rails—allowing users to tailor the system to their specific needs.
Installation Process and Mounting Kits
Vehicle-Specific Mounting Kits
Installation of the BASE Rack begins with the selection of a vehicle-specific mounting kit. These kits are developed to ensure compatibility with specific 4WD models, such as the Toyota FJ Cruiser and Land Cruiser. The mounting kit includes blade brackets that are designed to fit standard BASE Rack dimensions (e.g., 45x49in or 45x51in). These brackets attach directly to the OE factory roof mounting points, providing a stable and secure foundation for the BASE Rack.
Users are advised to consult with an authorized ARB dealer to ensure that the correct mounting kit is selected for their vehicle model. Proper installation requires careful alignment of the rack to ensure that it is level and secure. The mounting kit also includes all necessary hardware and instructions for attaching the BASE Rack to the vehicle.
Dovetail Extrusion System
The BASE Rack’s dovetail extrusion system is a key feature that differentiates it from traditional roof rack systems. This design allows for the attachment of accessories using clamp mounts, eliminating the need for complex fastening mechanisms. Accessories such as awning brackets, light bars, and Hi-Lift Jack mounts can be installed or removed quickly without disturbing the rest of the rack or cargo.
The extrusion runs along the full perimeter of the BASE Rack and along the internal beams, providing numerous attachment points. Unlike traditional roof rack channels, the dovetail system does not collect dust or debris, maintaining a clean and functional surface for accessory mounting.
Compatibility and Accessory Options
Guard Rail Options
The BASE Rack system offers four types of guard rail options, each designed to suit different user requirements:
- Full Rails: These provide a complete enclosure around the BASE Rack, offering maximum security for cargo and accessories.
- 1/4 Rails: Partial rails that extend from one side of the rack, suitable for users who require minimal enclosure.
- 1/2 Rails: Provide coverage on both sides of the rack, offering moderate protection.
- Trade Rails: Designed for heavy-duty use, these rails are ideal for carrying larger items such as tools or gear.
Users can mix and match rail options to suit their specific needs. The rails are interchangeable and can be added or removed as needed.
Accessories and Attachments
The BASE Rack supports a wide range of accessories, including:
- Awning Brackets: For attaching awnings or shelters to the roof.
- Gas Bottle and Jerry Can Holders: Secure storage for fuel containers.
- Hi-Lift Jack Mounts: For quick and easy access to recovery tools.
- Recovery Boards: For off-road recovery assistance.
- Light Bars: Available in single-bolt and end-mount configurations.
- Solar Panels and Aerials: For power and communication needs.
- Alloy Block Sets: For securing cargo in multiple positions.
Each accessory is designed to attach to the BASE Rack using a simple clamp mount, allowing for quick installation and removal. The system also includes mounting options for both horizontal and vertical attachment, with weight limits of up to six kilograms per bracket for wide mounts and three kilograms for narrow mounts.
Technical Considerations and User Reports
Wind Noise and Vibration Issues
Some users have reported experiencing wind noise and roof vibration at highway speeds (70+ mph) when using the BASE Rack on vehicles without sunroofs. These issues appear to be related to the interaction between the BASE Rack and the vehicle’s aerodynamics. One user installed the BASE Rack on a 2024 Land Cruiser 1958 and observed significant wind noise and vibration at higher speeds.
Potential causes include:
- Differences in roof structure between sunroof and non-sunroof models.
- Lack of an air deflector, which may contribute to aerodynamic instability.
Users considering installation on non-sunroof models are advised to contact ARB support for guidance on potential modifications or solutions.
Sunroof Compatibility
The BASE Rack is not officially designed for use with sunroofs, as the glass roof may not be strong enough to support the rack. However, some users have attempted installation on sunroof-equipped models by removing the air deflector. While this may reduce interference with the sunroof mechanism, it can lead to increased wind noise and aerodynamic inefficiencies.
Users considering installation on sunroof models should verify the structural integrity of the roof and consult with an authorized dealer for compatibility confirmation.
Wiring and Electrical Integration
For users requiring electrical integration, ARB offers two wiring kits for the BASE Rack:
- Pre-Installed Wiring Kit: Includes six wires (three circuits) with sealed wiring for internal installation.
- Customizable Wiring Kit: Provides six wire provisions for user-defined configurations.
These kits allow for the installation of lighting and other electrical accessories without the need for complex modifications. The wiring can be routed either inside the vehicle or through the roof or canopy, depending on the user’s preference.
Conclusion
The ARB BASE Rack is a highly versatile and customizable roof rack system designed for 4WD vehicles. Its dovetail extrusion system, modular design, and wide range of accessories make it a popular choice among off-road enthusiasts and utility-focused users. Installation is streamlined through vehicle-specific mounting kits, and the system supports a variety of guard rail and accessory configurations.
While the BASE Rack offers numerous benefits, users should be aware of potential wind noise and vibration issues, particularly on non-sunroof models. Consulting with an authorized ARB dealer is recommended to ensure proper installation and compatibility with the vehicle.