Mounting a spare tire on your trailer is a critical safety measure, ensuring you’re prepared for unexpected tire failures on the road and avoiding costly tow truck bills. The process involves selecting an appropriate mounting location, choosing a suitable mounting bracket, and securely attaching the spare tire to the trailer frame.
Why a Spare Tire is Non-Negotiable for Trailer Owners
Imagine this: You’re miles from anywhere, towing your precious cargo, when thump, thump, thump – a flat tire. Without a spare, you’re stranded. Cell service might be spotty, the wait for roadside assistance could be hours, and the cost could be astronomical. A spare tire is your insurance against these inconvenient and potentially dangerous scenarios. It allows you to quickly get back on the road and minimizes disruption to your travel plans. Beyond the immediate convenience, it protects your trailer and cargo from further damage that can occur when running on a flat. Investing in a proper spare tire setup is investing in peace of mind and the longevity of your trailer.
Choosing the Right Mounting Location
Where you mount your spare tire is crucial, impacting accessibility, weight distribution, and overall safety. Consider these factors:
- Accessibility: The spare should be easily accessible, even in adverse weather conditions or on uneven terrain. You don’t want to be wrestling with a tire under a loaded trailer in the pouring rain.
- Weight Distribution: Distribute the weight of the spare evenly to avoid affecting the trailer’s balance and handling. Avoid placing it too far to one side or at the extreme rear.
- Clearance: Ensure the spare tire doesn’t interfere with the trailer’s operation, including turning, maneuvering over bumps, and accessing other components like lights and license plates.
- Security: The location should be relatively secure from theft. While a lock is recommended (more on that later), a less exposed location can be a deterrent.
- Frame Strength: The mounting location must have sufficient structural integrity to support the weight of the spare tire, especially during bumpy rides.
Common mounting locations include:
- A-Frame: The A-frame (the triangular section at the front of the trailer) is a popular choice. It’s generally strong and easily accessible.
- Trailer Tongue: Mounting it on the tongue itself can be convenient, but be mindful of the added weight and potential interference with the hitch.
- Trailer Frame (Side or Rear): Mounting brackets can be attached directly to the trailer frame on the side or rear. Ensure the frame is strong enough.
- Underneath the Trailer (Specialized Mounts): Some mounts allow you to store the spare tire underneath the trailer, similar to some car designs. This can save space but may reduce ground clearance.
Selecting the Right Mounting Bracket
The mounting bracket is the interface between your spare tire and the trailer. Choose a bracket that’s:
- Compatible with your tire size and bolt pattern. Check your tire’s size and lug nut pattern carefully!
- Strong enough to support the weight of the tire. Don’t skimp on quality.
- Corrosion-resistant. Trailers are exposed to the elements, so choose a bracket made of galvanized steel, stainless steel, or powder-coated steel.
- Easy to install. Consider your skill level and choose a bracket that comes with clear instructions and all necessary hardware.
Different types of mounting brackets exist, including:
- Bolt-on brackets: These attach directly to the trailer frame using bolts.
- Weld-on brackets: These require welding to the trailer frame for a more permanent and secure connection. (Requires professional welding expertise.)
- U-bolt brackets: These use U-bolts to clamp the bracket to the trailer frame.
- Universal brackets: These are designed to fit a variety of trailer frames and tire sizes.
Installing the Spare Tire Mount: A Step-by-Step Guide
This guide assumes you’ve chosen a bolt-on bracket, the most common and accessible type for most DIYers.
- Gather your tools and materials: You’ll need the spare tire, mounting bracket, bolts, nuts, washers, a socket set, a wrench, a measuring tape, a drill (with appropriate drill bits), a marker, and safety glasses.
- Prepare the mounting location: Clean the area where the bracket will be attached. Remove any rust, dirt, or debris.
- Position the mounting bracket: Place the bracket in the desired location and mark the bolt hole positions on the trailer frame.
- Drill pilot holes: Using the appropriate drill bit, drill pilot holes at the marked locations.
- Attach the bracket: Bolt the bracket to the trailer frame using the provided bolts, nuts, and washers. Ensure the bracket is securely tightened.
- Mount the spare tire: Align the spare tire’s bolt pattern with the bracket’s mounting studs or bolts.
- Secure the spare tire: Tighten the lug nuts or bolts securely, following the manufacturer’s recommended torque specifications. Use a torque wrench for accurate tightening.
- Double-check everything: Inspect the installation to ensure all bolts and nuts are properly tightened and the spare tire is securely mounted.
Security Measures: Protecting Your Spare
Spare tires are a common target for theft. Consider these security measures:
- Locking Lug Nuts: Replace standard lug nuts with locking lug nuts that require a special key to remove.
- Cable Locks: Use a heavy-duty cable lock to secure the spare tire to the trailer frame.
- Spare Tire Cover: While not a security measure in itself, a spare tire cover can make the tire less visible and less appealing to thieves.
- Security Cameras: If you store your trailer in a vulnerable location, consider installing security cameras to deter theft.
FAQs: Spare Tire Mounting on Trailers
Here are answers to some frequently asked questions to further clarify the process.
FAQ 1: What size spare tire do I need?
You need a spare tire that matches the size, load rating, and bolt pattern of your trailer’s existing tires. Consult your trailer’s manual or the sidewall of your current tires for this information. Using an incorrect size spare tire can damage your trailer and compromise safety.
FAQ 2: Can I use a car tire as a spare for my trailer?
Generally, no. Trailer tires are designed for heavier loads and different stress than passenger car tires. Using a car tire, even temporarily, can be dangerous. Always use a tire specifically designed for trailer use.
FAQ 3: Do I need to balance my spare trailer tire?
While not strictly necessary, balancing the spare tire is recommended for smoother towing, especially at higher speeds. An unbalanced tire can cause vibrations and premature wear on your trailer’s suspension.
FAQ 4: What is the proper tire pressure for my spare trailer tire?
Inflate the spare tire to the maximum pressure indicated on the tire’s sidewall. This ensures it’s ready for immediate use when needed.
FAQ 5: How often should I check the pressure of my spare tire?
Check the pressure of your spare tire at least every three months, or before any long trip. Even unused tires can lose pressure over time.
FAQ 6: Can I mount the spare tire horizontally or does it have to be vertical?
The mounting orientation (horizontal or vertical) doesn’t typically affect the tire’s performance, as long as it’s securely mounted. Choose the orientation that best fits your available space and mounting bracket.
FAQ 7: What if my trailer frame is too thin to drill into?
If your trailer frame is too thin, consider using U-bolt brackets, which clamp around the frame instead of requiring drilling. You can also consult a professional welder to reinforce the frame or weld on a suitable mounting plate.
FAQ 8: How do I protect the spare tire from the elements?
Use a spare tire cover to protect the tire from sun damage, rain, and dirt. This will help prolong its lifespan and maintain its appearance.
FAQ 9: My spare tire mount is rusting. What should I do?
Remove any rust with a wire brush or sandpaper. Then, apply a rust-inhibiting primer and a coat of paint suitable for outdoor use. Regularly inspect the mount for rust and reapply paint as needed.
FAQ 10: Can I tow my trailer with a different size spare on one side temporarily?
Towing with a significantly different sized spare is strongly discouraged and should only be done in dire emergencies, and for the shortest distance possible at reduced speed. The different tire sizes will cause undue stress on the trailer’s axles and suspension. Get to a repair shop to install a proper tire size AS SOON as is safe.
FAQ 11: My trailer has tandem axles. Which tire should I replace first if I get a flat?
Replace the flat tire on the trailing axle first if possible. This will help maintain better control of the trailer. However, always prioritize safety and replace the most easily accessible tire if necessary.
FAQ 12: What tools should I always carry with me for changing a trailer tire?
Carry a lug wrench, jack, jack stand, torque wrench, tire pressure gauge, and gloves. These tools will enable you to safely and efficiently change a flat tire on your trailer.
By following these guidelines, you can confidently mount a spare tire on your trailer, ensuring a safer and more enjoyable towing experience. Remember, prevention is key, so always maintain your tires, check your spare tire regularly, and be prepared for the unexpected.