120 vs 110 Dirt Bike Tire- Which One Better? (Revised)

One of the most crucial parts of your dirt bike is its tires because they are the only point of contact between you and the road. But it might be challenging to tell a good tire from a bad one because dirt bike tires often have a similar appearance.

Your riding experience can be improved by replacing the stock tires on your dirt bike with superior ones, which means they have more volume, less rolling resistance, a higher cornering grip, or more puncture protection.

This article will compare two dirt bike tires; 120 vs. 110. We hope by the end of the article, you will be able to select the best one for you.

120 vs 110 Dirt Bike Tire: Quick Comparison

The first thing you need to know in this comparison is that 120 and 110 represent the dirt bike’s tire width. Therefore, the width is the main difference between a 120 and 110 dirt bike tire.

120 dirt bike tire means that the tire has a width of 120 mm. On the other hand, a 110 dirt bike tire means that the tire has a width of 110mm. This means the difference between the two tires is less than an inch.

However, you should be aware that tire width measurements are neither exact nor comparable, which makes them useless for sizing. Each tire company has its way of determining tire sizes.

As a result, most 120 dirt bike tires are fake 120s. 120 dirt bike tires can sometimes be narrower or wider.  Additionally, a competitor’s 110 can be larger than one tire company’s 120. Generally, a 120 will be wider than a 110 if you stick with the same tire type and brand. 

120 and 110 Dirt Bike Tire: Table Comparison

For the comparison table, we have utilized the 120/90-18 dirt bike tire and the 110/100-18.

Features 120/90-18 Dirt Bike Tires110/100-18 Dirt Bike TiresDifference
Diameter 26.5 inches26.66 inches0.6%
Width4.72 inches4.33 inches-8.3%
Sidewall height 4.25 inches4.33 inches1.9%
Aspect ratio9010010%
Circumference83.26 inches83.76 inches0.6%
Rim diameter18 inches18 inches0%
RPM760.95 revolutions756.45 revolutions-0.6%


Compared to 120/90-18 dirt bike tire, the 110/100-18 dirt bike tire ios 0.6% wider. This is not a huge difference and won’t largely affect how the tires perform.


The tires have an 8% width difference, with the 120/90-18 dirt bike tires having the largest width. 

Wide tires are known to handle better when taking sharp corners at high speeds. However, since the difference in width between the tires compared above is negligible, this will not affect how either of them will handle the corners.

Aspect Ratio

Aspect ratio is always indicated on a tire’s sidewall as a percentage. It’s a tire’s sidewall height expressed as a percentage of its width.

In the comparison table above, the 110/100-18 tire has a greater aspect ratio compared to the120/90-18.


The greater the tire circumference, the greater the tire’s rolling resistance. And the greater the rolling resistance, the more fuel consumption.

In the comparison above, the 110/100-18 tire is 0.6% greater in circumference than the 120/90-18. The difference in circumference is minimal, and so will the difference in rolling resistance and fuel consumption.

Rim Diameter

Rim Diameter is another important factor you must consider when buying new tires. You will need only to buy tires that are compatible with your bike’s rims; otherwise, you will need to buy new rims too.

The tires compared above will fit in 18-inch rims.


Revolutions per mile is the number of revolutions a tire makes every mile. The more revolutions the tire makes per mile, the more fuel your bike will consume.

In the comparison above, the 120/90-18 tire will make more revolutions compared to the 110/100-18.

120 vs 110 Dirt Bike Tire

The difference between the 120 and 110 dirt bike tires is in the width of these tires.

Selecting the suitable tire for you will depend primarily on what you want. If you are looking for tires that will help you handle the sharp corners easily, the 120 dirt bike tires are your best bet.

On the other hand, if you are looking for light and cheap tires, the 110 dirt bike tires will be the best option

Which Dirt Bike Tire is Best for You? (Check On Video)

Frequently Asked Questions (FAQ)

Can 120 and 110 Dirt Bike Tires be Used Interchangeably?

Yes. As indicated earlier in this article, the difference in width between the two tires is less than a quarter inch. So, as long as all the other factors are left constant, the two tires can be used interchangeably. 

What Do the Number on Dirt Bike Tires Indicate?

The metric system is the most typically utilized system in bike tires. The system utilizes a set of letters and numbers indicating the tire’s width, aspect ratio, and rim size.

What is a Dirt Bike?

A dirt bike is an illegal street motorcycle with no safety equipment. The bike lacks side mirrors, brake lights, and headlights.

Are Wider Dirt Bike Tires Better?

Wider dirt bike tires will offer you more cornering grip. This is a valuable characteristic, especially if you are using the bike for racing. The downside of wider tires is that they lead to more friction with the road, which can significantly affect your fuel economy.

Why Do Dirt Bikes Have a Front Tire That is Bigger Than the Rear Tire?

Dirt bikes feature huge front wheels, enabling them to roll over the terrain easily. The rear tires are smaller so that the bike can accelerate quickly.

How Long Do Dirt Bike Tires Last?

Dirt bike tires are expected to last on anywhere between 1500 to 2500 miles. However, some dirt bike tires will last over 4500 miles.

Is a wider tire better on a motorcycle?

Yeah, wider tire good for Motocycle. it’s will give you stable and secure ride especially on wet condition.

Are Fat tire motorcycles easier to ride?

Fat tires increase you budget on Motocycle. but it’s given you best ride performance on your journey especially on cold weather .

Final Take

We hope this article has helped you understand the differences between 120 and110 dirt bike tires. Selecting the suitable one for your dirt bike depends on your taste and preference.

Abdullah Anas

I am Abdullah Anas, a tire expert. I hate seeing people struggle to find the right tires for their cars. That is why he puts much effort into writing well-researched content about car tires. Today, it’s six years since he started the good work. I have received a lot of positive feedback from his readers and friends. Now my target is to let you understand every detail about all the tires available in the market

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