Lowering the spare tire on your Ford F-150 restores the clean, factory-line profile of your truck bed and eliminates the dangerous swing that occurs when the tire hangs too low. This procedure is common for owners who have replaced the original equipment tire with a smaller space-saver or when the original mounting hardware has stretched over time. Before you begin, ensure you have the correct tools, including a sturdy ladder, a torque wrench, and the appropriate socket size for your wheel lugs.
Safety First: Securing the Vehicle
Safety is the absolute priority when working on a truck elevated off the ground. You must park the vehicle on a solid, level surface and engage the parking brake firmly. Place wheel chocks against the front and rear of a tire on the opposite end of the truck to prevent any movement. Never rely solely on the jack that came with your vehicle to support the weight of the truck while you are underneath it; using jack stands is a non-negotiable requirement for this task.
Accessing the Spare Tire Mounting Point
The spare tire on most F-150 models is mounted to the rear of the truck bed, just behind the cab. To access the mounting bolts that secure the tire carrier to the frame, you will need to climb into the bed and position yourself near the tire. Look for the two large bolts that run vertically through the tire carrier and into the crossmember of the truck bed. These bolts are usually secured with a nut on the inside and a bolt head on the outside, making access from the rear of the truck necessary.
Removing the Old Mounting Hardware
With the vehicle securely lifted and supported, locate the retaining nut that holds the tire carrier to the frame. This nut is typically very tight and requires significant torque to loosen. Use a breaker bar or a high-quality socket wrench to break the nut loose, turning it counterclockwise. Once the nut is removed, you can lower the carrier arm until the spare tire rests flat on the ground or the bed floor, allowing you to completely remove the tire and the mounting hardware for inspection or replacement.
Adjusting the Carrier Arm Length
Many F-150 spare tire carriers feature an adjustable design that uses slotted holes or adjustable brackets to change the height of the tire. To lower the spare, you need to reposition the carrier arm to a lower set of holes or adjust the brackets closer to the center of the truck bed. This adjustment shortens the effective length of the carrier, pulling the tire down toward the bed floor and ensuring it sits flush with the rear of the truck.
Reinstalling the Hardware and Tire
After adjusting the carrier to the desired position, carefully lift the spare tire back into place. Align the holes in the tire carrier with the mounting points on the tire and insert the bolts through the assembly. Hand-tighten the nuts initially to ensure everything is seated correctly, then use your torque wrench to tighten the nuts to the manufacturer-specified torque settings. Over-tightening can damage the threads, while under-tightening can lead to dangerous movement while driving.
Final Checks and Test Drive
Once the spare tire is secured, slowly lower the truck from the jack stands using the hydraulic lift. Double-check the torque of the mounting nuts one final time once the weight of the truck is resting on the tire. Before driving off, inspect the tire visually to ensure it is not rubbing against any part of the wheel well or suspension. Take the truck for a short test drive at low speeds to confirm that the tire is stable and that there is no unusual vibration or movement.
