RETRUE Rear Air Bag Suspension Kit for Toyota Tundra 2007–2021 — Adjustable Rear Air Springs, 5,000 lb Load-Leveling

RETRUE Rear Air Bags Suspension Kit upgrades your 2007–2021 Toyota Tundra rear suspension to adjustable air spring support for improved load-leveling, ride control, and stability.

If you haul heavy cargo, tow trailers, or simply want firmer rear-end support on your Tundra, this RETRUE rear air bag kit replaces the factory springs with adjustable air springs that let you dial ride height and firmness. Designed as a direct-fit replacement for kits like the Firestone Ride-Rite 2445, the set is compatible with both 2WD and 4WD Tundra models from 2007 through 2021 and includes hardware and instructions to simplify installation.

How does this kit change towing and hauling performance?

The RETRUE air springs increase rear spring rate under load so the truck stays level and controlled when carrying heavy items or towing. By supporting up to 5,000 pounds of additional load-leveling capacity, the system reduces rear squat and improves trailer tracking without altering front suspension geometry.

• Up to 5,000 lb load-leveling capacity for improved balance under load
• Reduces rear sag and improves headlight aim and braking consistency
• Maintains better trailer alignment and tow stability at highway speeds

What range of adjustment and ride control does the kit offer?

Air pressure can be tuned from 5 to 100 psi, so you can soften the ride for daily driving or firm it up for heavy payloads and towing. Small pressure changes translate into noticeable differences in body roll, rear-end movement, and overall comfort, making the truck adaptable for mixed-use.

• 5–100 psi adjustable range for fine-tuning stiffness
• Easy pressure changes let you switch between comfort and performance quickly
• Helps level vehicle side-to-side as well as front-to-rear under uneven loads

How easy is installation and what comes in the box?

The kit is engineered for straightforward installation with pre-drilled brackets that eliminate the need to drill into the frame for most models. All parts are labeled and accompanied by step-by-step instructions; common hand tools or basic pneumatic tools speed assembly for most experienced DIYers.

• Pre-drilled mounting points—typically no drilling required
• Labeled hardware and clear instructions included for faster setup
• Works as a drop-in replacement for Firestone-type rear air bag kits

What reliability and support does RETRUE provide?

RETRUE backs the product with customer support to answer fitment, installation, and operation questions, reflecting the brand’s focus on post-sale service. Components are built to withstand road vibrations and heavy-duty use, aiming for long-term durability in towing and utility applications.

• Dedicated customer support for fitment and troubleshooting
• Durable materials designed to resist abrasion and road vibrations
• Clear return and assistance channels if issues arise after purchase

Who is this for: The RETRUE Rear Air Bags Suspension Kit is intended for Toyota Tundra owners (2007–2021) who regularly carry heavy loads, tow trailers, or want a customizable rear suspension that balances comfort and capability. It suits DIY installers with basic mechanical experience as well as shops upgrading trucks for work, recreation, or improved everyday handling. If you need a simple, adjustable rear support system to cut rear sag, stabilize towing, and make payloads safer and more predictable, this kit offers a practical upgrade without major frame modifications.