Looking to boost your truckâs hauling power without overloading your main axles? Thatâs where lift axles come in.
Upgrade Your Loading Capacity
Whether youâre running a pusher axle, drop axle, or a steerable lift axle, adding the right components helps distribute weight more evenly and keep you DOT-compliantâall while improving ride quality and reducing wear on your truck. At 4 State Trucks, we carry the aftermarket lift axle parts and accessories that help you get the job done right.
Why Upgrade Your Lift Axle Setup?
- Handle heavier loads safely and legally by adding support where it counts.
- Improve fuel economy by raising the axle when itâs not neededâless rolling resistance, more savings.
- Extend tire and suspension life by lifting during light loads or deadhead runs.
- Better control and stability with steerable lift axles that improve turning radius and tracking.
Built for Hard Work
Our lineup includes axle connection service repair kits, pivot alignment kits, end beam bushings, fender bracket kits for drum brakes, and more. Whether you're upgrading your suspension or fixing worn pivot components, weâve got the heavy-duty solutions built to hold up under pressure. From 8,000 lb. to 20,000 lb. capacity ranges, our lift axle components are trusted by owner-operators, fleet managers, and upfitters across the industry.
Shop Online With Confidence
We only stock commercial-grade parts built for the demands of the road. Whether you're ordering online or stocking up at the shop, 4 State Trucks has the parts, tools, and knowledge to support your lift axle system from the frame brackets to the fender hardware.
Throw in some related products to help keep your axle height consistent, like
air springs and level valves, plumb your new lift axle more quickly with with
fresh bulkhead tees, air lines and hose fittings, or conveniently add in a new
replacement air valve dryer while you're upgrading your lift-axle kit.
Ready to Upgrade Your Lift Axle Game?
Browse our full selection of semi truck lift axle kits and accessories to customize your ride for power, performance, and complianceâmile after mile.
Frequently Asked Questions About Lift Axles
What is a lift axle and why would I need one?
A lift axle is an auxiliary axle mounted on a trailer or truck chassis that can be raised or lowered as needed. When empty or lightly loaded, the axle is lifted off the ground to reduce tire wear and improve fuel economy. When the vehicle is fully loaded, the axle is lowered to help distribute weight across more axles, allowing the truck to legally carry heavier loads while staying within axle weight limits.
Will a lift axle system fit my specific truck or trailer?
Fitment depends on your frame width, suspension type, and axle rating, so it is important to check specifications carefully before purchasing. Many lift axle kits are designed for specific frame configurations or weight capacities, so confirming your vehicle's make, model, and existing suspension setup against the product listing will help ensure proper fitment.
Is installing a lift axle something I can do myself, or should I have it professionally installed?
Lift axle installation typically involves welding or bolting axle components to the frame, along with integrating air or hydraulic lift controls into the vehicle's system. Because this affects structural integrity and braking or air systems, many owners choose to have installation performed by a qualified shop unless they have experience with heavy-duty axle and suspension work.
Are lift axles legal to use on public roads, and are there weight regulations I should know about?
Lift axles are legal and widely used across the trucking industry, but weight limits and axle spacing rules vary by state and are enforced under both federal and state regulations. It is your responsibility to understand the specific bridge formula and axle weight requirements in the states where you operate to ensure your loaded and unloaded configurations remain compliant.
How do I maintain a lift axle system to keep it working properly?
Routine maintenance includes checking air lines and fittings for leaks, inspecting the lift mechanism and linkages for wear, greasing pivot points as recommended, and confirming the axle raises and lowers smoothly under load and unloaded conditions. Regular inspection of tires, bearings, and brake components on the lift axle itself is also important since these parts see periodic rather than constant use.
