Securing a spare tire on the Jeep Gladiator involves understanding the unique mounting system in the truck bed. The Jeep Gladiator spare tire mount is not a one-size-fits-all component, and choosing the right setup depends on your tire size, bed accessories, and how you use your truck.
Unlike traditional SUVs, the Gladiator’s spare tire location is in the bed, which gives you flexibility but also presents some challenges. You can keep it in the factory spot, move it to a different position, or even mount it on a rack. This guide walks you through everything you need to know.
Understanding The Factory Jeep Gladiator Spare Tire Mount
The stock mount is designed for the standard 33-inch tire that comes with most trims. It sits vertically against the front wall of the bed, right behind the cab. The mount uses a single bolt and a metal bracket that hooks into the wheel’s center hole.
This system works fine for daily driving and light off-roading. But if you upgrade to larger tires—say 35s or 37s—the factory mount won’t fit. The tire will be too tall or too wide, and it might rub against the bed walls or the tailgate.
Another issue is that the factory mount takes up valuable bed space. If you need to haul gear, the tire can get in the way. Many owners end up moving the tire to a different location or using an aftermarket solution.
Common Problems With The Stock Mount
- Limited tire size compatibility (max 33 inches)
- Blocks access to the front of the bed
- Single bolt can loosen over time
- No easy way to secure the tire for heavy off-roading
If you’re running a stock setup, the factory mount is fine. But for any upgrade, you’ll need to look at aftermarket options. Let’s break down the main choices.
Aftermarket Jeep Gladiator Spare Tire Mount Options
When you outgrow the factory mount, you have several paths. Each has pros and cons depending on your budget and how you use the truck.
Bed Mount Relocation Kits
These kits move the tire to a different spot in the bed. Some mount the tire flat on the bed floor, while others tilt it at an angle to save space. The most popular option is a vertical mount that sits closer to the tailgate.
Relocation kits usually include a stronger bracket and a longer bolt. They can handle tires up to 37 inches. Installation is straightforward—you drill a few holes or use existing bed tie-down points.
One downside is that you still lose some bed space. But if you don’t need the full bed length, this is a cost-effective solution.
Tailgate Mounts
Tailgate mounts attach the spare tire to the outside of the tailgate. This keeps the bed completely free for cargo. These mounts are popular with overlanders and anyone who needs maximum bed space.
However, tailgate mounts add weight to the tailgate, which can strain the hinges. You’ll need a heavy-duty tailgate reinforcement kit to prevent sagging. Also, the tire blocks the tailgate from opening fully, so you might need to remove it to access the bed.
Another consideration is visibility. A large tire on the tailgate can block your rearview camera and make backing up harder.
Bumper Mounts
Some aftermarket rear bumpers come with a built-in spare tire mount. This is the most secure option because the bumper is designed to handle the weight. It also keeps the tire out of the bed entirely.
Bumper mounts are great for off-roaders who want a clean look and full bed access. But they’re expensive—a good bumper with a tire carrier can cost $1,000 or more. Installation is also more involved, often requiring cutting the factory bumper.
You also need to check that the bumper doesn’t interfere with your trailer hitch or backup sensors.
Rooftop And Bed Rack Mounts
If you have a bed rack or a roof rack, you can mount the spare tire up high. This is common for overland builds where the bed is full of gear. The tire sits on top of the rack, secured with straps or a dedicated mount.
This option keeps the bed clear but raises the center of gravity. It can also make the truck harder to park in low garages. Plus, you need a strong rack that can handle the weight of a heavy tire.
For most people, this is a niche solution. It works best if you already have a rack for other purposes.
How To Choose The Right Mount For Your Gladiator
Picking the right mount depends on three factors: tire size, bed usage, and budget. Here’s a simple decision tree.
- Stock tire (33 inches or less): Stick with the factory mount. It’s free and works fine.
- Upgraded tire (35-37 inches): Consider a bed relocation kit or a tailgate mount. Both handle these sizes well.
- Large tire (37+ inches): Go with a bumper mount or a heavy-duty bed rack. The weight requires a robust solution.
- Need full bed space: Tailgate mount or bumper mount are your best bets.
- Budget under $200: Bed relocation kit is the cheapest option.
- Budget over $500: Bumper mount gives the best security and bed access.
Also think about how often you off-road. If you’re just on pavement, a simple relocation kit is fine. If you’re bouncing over rocks, you want a mount that won’t rattle loose.
Installation Tips For A Secure Mount
No matter which mount you choose, proper installation is key. A loose spare tire can be dangerous. Here are some tips.
- Always use thread locker on the mounting bolt. Loctite blue is a good choice.
- Tighten the bolt to the manufacturer’s torque spec. Over-tightening can strip threads.
- Check the mount after the first 100 miles. Bolts can settle and loosen.
- If using a tailgate mount, reinforce the tailgate hinges. The extra weight will cause sag over time.
- For bed mounts, use a rubber pad between the tire and the bed to prevent scratches.
One common mistake is not accounting for the tire’s weight. A 35-inch tire with a steel wheel can weigh over 80 pounds. Make sure your mount and your truck’s structure can handle that.
Jeep Gladiator Spare Tire Mount And Bed Accessories
Your spare tire mount might interact with other bed accessories. Here’s what to watch for.
Tonneau Covers
If you have a soft or hard tonneau cover, a vertical bed mount might not work. The tire can hit the cover when you close it. Some covers have a cutout for the tire, but most don’t.
For tonneau covers, a flat bed mount or a tailgate mount is better. Flat mounts keep the tire low enough to clear the cover.
Bed Liners
Spray-in bed liners are fine with any mount. Drop-in liners can be tricky because they add thickness. You might need to trim the liner around the mount’s base.
If you have a drop-in liner, test-fit the mount before drilling holes. You don’t want to cut the liner in the wrong spot.
Toolboxes And Drawers
If you have a toolbox or drawer system in the bed, the spare tire location matters. A vertical mount behind the cab might block access to the toolbox. A tailgate mount keeps everything clear.
Measure twice before buying. You don’t want to find out the tire hits your drawer handles.
Weight And Balance Considerations
Adding a heavy spare tire to the bed changes your truck’s balance. The Gladiator has a relatively short wheelbase, so weight in the bed affects handling.
A tire mounted high (on a rack) raises the center of gravity, making the truck more prone to body roll. A tire mounted low (on the bed floor) keeps the center of gravity lower.
For off-roading, a low mount is better. It reduces the risk of tipping on side slopes. For daily driving, the difference is small, but you’ll notice it in corners.
Also consider the weight on the rear axle. A heavy tire can reduce your payload capacity. Check your Gladiator’s payload rating (usually around 1,200 pounds) and subtract the tire weight.
Maintenance And Care For Your Mount
Your spare tire mount needs occasional maintenance. Here’s what to do.
- Inspect the bolt and bracket every oil change. Look for rust or wear.
- Lubricate any moving parts (like a tailgate hinge) with silicone spray.
- Check the tire pressure. A spare tire loses air over time, just like the others.
- If you off-road in mud or salt, rinse the mount afterward. Corrosion can weaken it.
Most aftermarket mounts are made of steel or aluminum. Steel is stronger but heavier and prone to rust. Aluminum is lighter and rust-proof but can bend under extreme loads.
For steel mounts, consider a powder-coated finish. It holds up better than paint.
Frequently Asked Questions
Can I fit a 35-inch tire on the factory Jeep Gladiator spare tire mount?
No, the factory mount is designed for tires up to 33 inches. A 35-inch tire will be too tall and may hit the bed wall or tailgate. You need an aftermarket relocation kit or a different mount.
Does the spare tire mount affect my Gladiator’s warranty?
Generally, no. Aftermarket parts don’t void the warranty unless they cause a failure. If you drill holes or modify the bed, those specific areas might not be covered. But the rest of the truck stays under warranty.
How do I remove the factory spare tire mount?
It’s simple. Remove the single bolt holding the tire, then unbolt the bracket from the bed wall. The bracket is held by two or three bolts. You might need a socket wrench and a Torx bit.
Can I mount a spare tire on the Gladiator’s tailgate without a kit?
Technically yes, but it’s not recommended. The tailgate isn’t designed for that weight. Without a reinforcement kit, the hinges will sag and the tailgate might warp. Always use a proper tailgate mount kit.
What is the best Jeep Gladiator spare tire mount for off-roading?
For serious off-roading, a bumper-mounted carrier is the best. It’s the most secure and keeps the tire out of the bed. Brands like Smittybilt and Rugged Ridge make good options. Just make sure it’s rated for your tire size.
Final Thoughts On Your Spare Tire Setup
Your Jeep Gladiator spare tire mount is more than just a bracket—it’s part of your truck’s utility. Whether you stick with the factory mount or upgrade to a heavy-duty carrier, the goal is the same: keep that spare secure and accessible.
Think about your typical driving. If you rarely go off-road, a simple relocation kit is plenty. If you’re building an overland rig, invest in a bumper mount or a rack system. The right choice makes your Gladiator more capable and more enjoyable to use.
Don’t forget to check your spare tire regularly. A flat spare is useless when you need it. And if you’re running larger tires, make sure your mount can handle the weight. A little planning now saves you headaches on the trail.
One last tip: if you’re not sure which mount to buy, join a Gladiator forum. Owners there have tested every option and can give you real-world advice. They’ll tell you which mounts rattle, which ones rust, and which ones are worth the money.
Your spare tire mount is a small part of the truck, but it makes a big difference when you need it. Choose wisely, install it right, and you’ll never have to worry about being stranded with a flat.