Rear Axle Air Bag Kits for 2016 Toyota Tundra Crewmax 4x4 with 4-Inch Lift  

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Helpful Expert Reply:

We offer both Firestone and AirLift rear axle air bag kits for your 2016 Toyota Tundra Crewmax 4x4 that you can see on the linked page. And thank you for the photo of your truck and trailer.

Firestone kit # F2445 offers 4800-lbs of load-leveling capacity and can be used with 4-inch spacer kit # F2371. Adjustable air bag kits like these are great for balancing out uneven cargo loads in the truck bed but there is another option for correcting rear-end sag from trailer tongue weight (TW).

Another way to address rear-end sag in a tow vehicle is to use a weight distribution system that shifts some of the trailer TW forward onto the front axle, which helps maintain solid traction for good steering and braking performance. Please refer to the linked article for background on how these systems install and operate. It is possible to add a second set of spring bars to such systems to accommodate the two different tongue weights of two trailers. These systems are tuned to a specific trailer TW and if you tow two trailers with very different TWs a second set of bars allow you to have the system operate properly with both trailers without having to buy two complete separate WD systems.

Another benefit of using WD rather than air bags is that such systems can include built-in trailer sway prevention. For instance, for a trailer TW of 1000-lbs the Reese Steadi-Flex Weight Distribution System # RP66560 will provide both a shift of trailer TW to your front axle and also help prevent trailer sway.

expert reply by: Adam R

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