A spare tire cover might look like a simple accessory, but for Jeep Wrangler owners, it serves a bigger purpose. It protects your spare tire from sun, rain, mud, and even curious animals.
However, choosing the right size spare tire cover for your Jeep Wrangler isn’t as simple as picking one that “looks about right.
” Getting the correct fit matters for both protection and appearance. Let’s explore how to find the perfect size, what to consider, and some tips that most beginners overlook.
Why Size Matters For Your Jeep Wrangler Spare Tire Cover
A cover that’s too tight is hard to put on and may tear. A cover that’s too loose will flap in the wind, collect water, and could even fall off while driving. The correct size ensures your spare tire is safe from the elements and stays securely in place.
Most Jeep Wranglers have their spare tire mounted on the back. This tire is fully exposed to the weather, making a well-fitting cover important for preventing early aging and damage.
How To Measure Your Spare Tire
To get the right cover, you need two main numbers: tire diameter and tire width. These can usually be found on the sidewall of your tire.
The tire size looks like this: 255/75R17.
- 255 = Tire width in millimeters (about 10 inches)
- 75 = Aspect ratio (sidewall height as a percentage of width)
- 17 = Wheel diameter in inches
To find the overall diameter (the measurement you need):
- Convert the width to inches (divide by 25.4).
- Multiply the width by the aspect ratio (as a decimal), then multiply by 2 (for both sidewalls).
- Add the wheel diameter.
Let’s use 255/75R17 as an example:
- Width: 255mm ÷ 25.4 = 10.04 inches
- Sidewall height: 255mm × 0.75 = 191.25mm ÷ 25.4 = 7.53 inches
- Total tire diameter: 7.53 × 2 + 17 = 32.06 inches
So, you need a spare tire cover that fits a 32-inch tire.
Common Spare Tire Sizes For Jeep Wranglers
Different Jeep Wrangler models come with different factory tire sizes. Here’s a quick comparison to help you identify what size you likely need:
| Wrangler Model | Stock Tire Size | Approx. Tire Diameter (inches) |
|---|---|---|
| Sport / Sport S | 245/75R17 | 31.5 |
| Sahara | 255/70R18 | 32.1 |
| Rubicon | 285/70R17 | 32.7 |
| Old Models (TJ, YJ) | Various | 28-30 |
If you have aftermarket tires (for example, 33-inch or 35-inch), always measure your actual tire.
Choosing The Right Spare Tire Cover Size
Most tire cover brands list their sizes in inches (like “32-inch cover”). Always match the cover size to your tire diameter.
But not all covers fit the same way. Here’s a simple guide:
| Tire Diameter (inches) | Recommended Cover Size |
|---|---|
| 27-29 | 28″ |
| 29-31 | 30″ |
| 31-33 | 32″ |
| 33-35 | 34″ |
Tip: Always check the manufacturer’s sizing guide. Some brands size a little larger or smaller.
Types Of Spare Tire Covers
Not all covers are the same. Jeep Wrangler owners can choose from:
- Soft Vinyl Covers – Affordable, easy to clean, and quick to install. Good for daily use.
- Hard Shell Covers – Offer stronger protection and look more rugged. They are more expensive but last longer.
- Custom Covers – Feature custom graphics, logos, or even backup camera cutouts.
If your Wrangler has a backup camera inside the spare tire, choose a cover with a camera hole.
Common Mistakes When Choosing A Spare Tire Cover
Many first-timers make these errors:
- Guessing the size instead of measuring.
- Ignoring tire width (for very wide aftermarket tires).
- Forgetting about the backup camera.
- Choosing a cover that can’t handle weather in their area.
If you live where there’s a lot of sun, look for covers with UV protection. In rainy or snowy places, a waterproof cover is better.
Practical Tips For A Perfect Fit
- Measure your tire even if you think you know the size.
- Check for extra features like elastic bands or grommets for a tighter fit.
- Clean your tire before installing the cover to prevent scratching.
- If you switch to larger tires, don’t forget to buy a new cover.
A non-obvious insight: Some covers shrink or stretch a little after exposure to sun and rain. If your tire is right at the upper limit for a cover size, consider going one size up.
Another tip: Some hard shell covers can be painted to match your Jeep’s color, but always use automotive paint for best results.
Where To Buy And What To Expect
You can find spare tire covers at auto parts stores, Jeep dealerships, and online. Prices range from $20 for a basic vinyl cover to $150+ for custom or hard shell designs.
Online stores often have size guides and customer reviews. Reading these reviews can help you avoid poorly fitting covers or low-quality materials. For more details on tire sizing and covers, the Wikipedia Spare Tire page gives a good overview.
Frequently Asked Questions
What If My Jeep Wrangler Has Aftermarket Tires?
Always measure your actual tire diameter and width. Aftermarket tires can be larger than factory tires.
Never rely on the original owner’s manual size if you’ve changed your tires.
Do I Need A Cover With A Camera Hole?
If your Jeep has a backup camera inside the spare tire (most 2018+ Wranglers), you need a cover with a pre-cut hole or flap for the camera. Otherwise, you’ll block your view.
Will A Cover Fit If My Tire Has A Deep Tread?
Very deep or aggressive off-road treads make the tire wider. Make sure the cover you pick can stretch over the tread, or choose a slightly larger size.
How Do I Clean My Spare Tire Cover?
Most vinyl covers can be cleaned with mild soap and water. Hard shell covers can be washed like your car’s body.
Avoid strong chemicals, which can damage the material or graphics.
Can I Use A Cover From Another Vehicle On My Jeep Wrangler?
Only if the tire sizes match exactly. Even a small difference in diameter or width can cause a poor fit or damage the cover over time.
Choosing the right spare tire cover size for your Jeep Wrangler is easy once you know what to measure and what features to look for. Take a few minutes to check your tire size, read manufacturer guides, and consider your local weather.
This simple step helps protect your investment and keeps your Jeep looking sharp for years to come.
