Best Crossbars for Roof Top Tents

For outdoor enthusiasts, a roof top tent (RTT) opens up convenient, elevated sleeping quarters and a home-base feel on the trail. The right crossbars are the backbone of a stable RTT setup, supporting weight, withstanding wind, and accommodating various vehicles and mounting systems. This guide examines top crossbars for roof top tents, compares materials and load ratings, and provides practical advice to help buyers choose crossbars that maximize safety, durability, and ease of use while aligning with popular search terms like “roof rack crossbars” and “best crossbars for roof top tent.”

What Are Roof Rack Crossbars And Why They Matter

Crossbars are the bars that span the width of a vehicle’s roof and provide a mounting platform for roof top tents, bike racks, kayaks, and other gear. For roof top tents, crossbars must offer robust load ratings, secure attachment points, and compatibility with RTT mounting kits. The wrong crossbars can cause movement, noise, or premature wear at the roof seams. In contrast, well-chosen crossbars improve stability during driving, reduce wind resistance, and simplify installation and removal of the tent. When evaluating crossbars, buyers should consider material composition, weight, theoretical load capacity, spread, compatibility with rails or wind deflectors, and whether the system supports aftermarket RTT mounting brackets.

Top Crossbars By Material

Crossbars come mainly in aluminum or steel, with aluminum being the most common choice for roof top tents due to lighter weight and corrosion resistance. Steel crossbars offer maximum load capacity and durability, which can be helpful for heavier RTT setups or frequently loaded vehicles. Some manufacturers offer aero-dynamic, low-profile crossbars to minimize wind noise and drag, while others emphasize rugged, square-profile rails for simple clamp-on RTT mounts. For most civilian SUVs and trucks, high-quality aluminum crossbars with a rated load well above the RTT weight (including gear) are the best balance of strength and weight. For extreme expeditions or heavier payloads, consider steel crossbars with reinforced gussets and proper corrosion protection.

Key Features To Look For

The following features influence performance and long-term reliability of crossbars for roof top tents:

• Weight rating: Ensure the crossbars’ maximum dynamic load rating (per pair) exceeds the combined weight of the RTT, occupants, and gear. Always follow the RTT manufacturer’s mounting guidelines and vehicle roof weight limits.
• Attachment system compatibility: Verify compatibility with your RTT mounting brackets, soft roof rack mounts, or side rails. Some crossbars use T-slot channels or integrated clamp systems for fast, secure attachment.
• Bar shape and aero design: Aerodynamic, rounded or teardrop shapes reduce wind noise and drag, improving fuel economy on longer trips.
• Diameter and width: A wider track spreads load and reduces dent risk on the roof, while a suitable diameter accommodates clamps without slipping.
• Corrosion resistance: Coatings like powder coat or anodization extend life in harsh conditions, especially in coastal or winter environments.
• Ease of installation: Quick-release mounts or standardized accessory tracks can save time when deploying or packing up the RTT.
• Vehicle compatibility: Confirm compatibility with roof rails, naked roof systems, or raised rails to avoid compatibility gaps.

Best Crossbars For Different Vehicle Setups

Different vehicles and RTT configurations benefit from particular crossbar lines. The following categories help readers narrow choices based on common setups.

• Lightweight, compact SUVs: Aluminum aero crossbars with high load capacity and a low wind profile are ideal, offering compatibility with compact RTTs and easy mounting.
• Full-size SUVs and trucks: Heavier duty crossbars (often steel or reinforced aluminum) with generous spread and robust attachment systems support larger RTTs and extra gear racks.
• Rail-based systems: If the vehicle already has side rails or low-profile rails, select crossbars that clamp or slide into existing rails with secure locking mechanisms.
• All-terrain adventurers: A robust, corrosion-resistant crossbar pair with a high dynamic load rating and proven RTT mounting kits ensures reliability in remote environments.

Installation Tips And Safety

Proper installation is crucial for safety and performance. The following guidelines help ensure a secure RTT setup:

• Follow manufacturer weight limits: Do not exceed the combined weight rating of the crossbars and vehicle roof. Account for the RTT, occupants, and any extra gear.
• Distribute weight evenly: Position the RTT to balance weight on both sides of the vehicle and align mounting points with the crossbars’ channels or clamps.
• Check torque and fasteners: Periodically inspect and re-tighten mounting bolts according to the RTT and crossbar manufacturers’ specifications.
• Use locking hardware: Use anti-theft and anti-loosening hardware where offered to prevent movement during travel and in high-wind conditions.
• Test drive: After installation, perform a short test drive at varying speeds to listen for movement, rattling, or misalignment, then re-tighten as needed.

Note: Wind can affect RTT performance; even with sturdy crossbars, drive cautiously at higher speeds in strong crosswinds, especially when the tent is deployed.

Maintenance And Longevity

To maximize crossbar life and RTT reliability, implement a simple maintenance routine. Clean crossbars to remove dirt and salt, inspect for corrosion or cracks, and promptly replace any worn clamps or fasteners. Lubricate sliding channels if present and check rubber gaskets around mounting points for wear. Regular inspections help prevent failure and ensure the RTT remains securely attached in rough weather.

Frequently Asked Questions

Are aluminum crossbars better than steel for roof top tents? For most users, aluminum crossbars offer a favorable balance of weight, strength, and corrosion resistance, which is advantageous for mobile camping setups. Steel crossbars excel in extreme load scenarios but add weight and require more maintenance to prevent rust.

What load rating should I look for in crossbars for RTTs? Aim for a dynamic load rating that comfortably exceeds the RTT weight plus anticipated gear. A common target is at least 150-200 pounds above the tent’s weight, but verify with both RTT and crossbar manufacturers.

Can I mount an RTT on any crossbar? Compatibility depends on the RTT mounting system and crossbar design. Check the RTT’s installation guide and crossbar product specs for compatibility notes and required adapters.

How do I prevent wind rattling on the roof rack? Choose aero-shaped crossbars, use anti-rattle clips or torque-down clamps, and ensure all fasteners are properly tightened. Adding a roof top tent cover can also reduce wind noise in lighter setups.

Is maintenance required after a long trip? Yes, inspect for loosened hardware, inspect seals around mounting points, clean off mud or salt, and re-tighten according to manufacturer recommendations.