18×8 Tire Size: What Fits This Wheel?

“What size tire can I put on a 18×8 rim?”

If this question has been on your mind, then you’ve come to the right place!

This article will provide you with suitable size tires commonly fitted on a 18×8 wheel. Additionally, the best, the widest, and the smallest tire sizes for 18×8 rims are also covered.

What Does 18×8 Rim Mean?

“18×8” refers to the size of the wheel. The “18” represents the wheel’s diameter in inches, while “8” represents its width, also measured in inches.

18×8 rims are popular for their enhanced stability during cornering and improved road grip. They also provide a sleek and sporty appearance to vehicles.

The majority of rims come with three basic sizes behind the hub. These sizes tell you whether or not the rim will fit the tire. You can use this information as a guide when getting new tires.

18x8 rim size explanation
18×8 rim implies that the wheel has a diameter of 18 inches, and has a width in 8 inches

What Tire Sizes Fit 18×8 Rims?

The appropriate tire size for 18×8 wheels depends on finding the right balance between performance, aesthetics, and practicality.

Here are some of the most recommended tire sizes for 18×8 rims:

  • 225/40 R18
  • 235/35 R18
  • 235/40 R18
  • 245/35 R18 
  • 245/40 R18
  • 245/45 R18
  • 255/40 R18

We understand that tire sizing can be difficult to understand, so here’s a guide to decoding the sizing pattern on your tire:

  • The first number in the sequence is the tire’s total width measured in millimeters
  • The second number represents the sidewall height as a percentage of the tire width
  • The last number represents the diameter of the recommended wheel for a tire (measured in inches)

For example, if you buy a 225/20 R18 tire, the measurements would be:

Tire Size Explanation
Tire Size Explanation

What Is The Best Tire Size For 18×8 Wheels?

The 225/40 R18 and 235/40 R18 are the best recommended tire sizes for the 18×8 wheel. These tires have a perfect sidewall shape allowing them to fit well in the 18×8 wheel.

We understand that the word “best” might translate differently to different people as it is indeed generalized.

Between these two tire sizes, the most recommended one for 18×8 rim is 225/40 R18. It will keep the steering precise and provide the best response.

However, if you want a little wider tire, your best bet is 235/40 R18. It fills the guards better while providing better braking, thanks to its larger patch under braking load.

What Is The Biggest Tire Size For 18×8 Rims?

The max tire size you can fit on 18×8 and remain safe is the 255/40 R18 tire.

While this is a matter of choice, we recommend that you use tire sizes that match your vehicle’s wheel perfectly for optimum performance. However, larger tire sizes do have their perks. Below we have listed a few advantages and disadvantages of fitting larger tire sizes compared to suitable ones.


  • Good dry performance
  • Comfortable and quiet
  • Reasonably priced
  • Decent wet and light snow performance


  • Limited traction on moderate to heavy snow conditions

What Is The Smallest Tire Size On A 18×8 Wheel?

For those seeking a more compact tire setup, the smallest tire size for 18×8 rims is 215/35 R18. This size provides a sleek appearance while maintaining acceptable handling characteristics. However, it’s not commonly recommended for this rim size because the tire may be stretched a bit.

Below we have provided you with a few pros and cons of using smaller tires instead of suitable ones:


  • Good dry performance
  • Comfortable and quiet
  • Reasonably priced
  • Decent wet and light snow performance


  • Limited traction on moderate to heavy snow conditions


As mentioned earlier, the best-fitted tire size for your 18×8 inch wheel is 225/40 R18. You can pick 235/40 R18 if you want a little wider tire size. Both of these tire sizes are good fits for your 18×8 rim.

Remember that tire selection is a personal decision, and understanding your driving needs will help you make an informed choice that perfectly complements your 18×8 wheels.

Read more: 15×8 Tire Size: What Fits This Rim?
Read more: 15×10 Tire Size: What Fits This Wheel?

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