Dirt bike tire sizes vary, but common front sizes include 80/100-21 and 90/100-21, indicating width and rim diameter. Rear sizes like 100/90-19 and 110/90-19 follow a similar format. These sizes affect traction and handling on different terrains, so choose based on your riding preferences and bike model. Always consult your bike’s manual for recommended tire sizes.
Dirt Bike Tire Size Calculator
Tire Diameter: mm
Here’s a table summarizing common dirt bike tire sizes and their corresponding measurements:
| Tire Size | Front (Width/Aspect Ratio-Rim Diameter) | Rear (Width/Aspect Ratio-Rim Diameter) |
|---|---|---|
| 80/100-21 | 80mm / 100% – 21 inches | – |
| 90/100-21 | 90mm / 100% – 21 inches | – |
| 70/100-19 | 70mm / 100% – 19 inches | – |
| 80/100-19 | 80mm / 100% – 19 inches | – |
| 100/100-18 | 100mm / 100% – 18 inches | – |
| 110/100-18 | 110mm / 100% – 18 inches | – |
| 90/100-16 | 90mm / 100% – 16 inches | – |
| 80/100-12 | 80mm / 100% – 12 inches | – |
| 110/80-19 | 110mm / 80% – 19 inches | – |
| 120/80-19 | 120mm / 80% – 19 inches | – |
| – | – | 100/90-19 – 19 inches |
| – | – | 110/90-19 – 19 inches |
| – | – | 120/90-19 – 19 inches |
Please note that these are just some common dirt bike tire sizes, and there are many more variations available depending on the bike’s make and model. The table provides the tire size format, width in millimeters, aspect ratio as a percentage, and rim diameter in inches for both front and rear tires.
FAQs
Is 90 90 18 the same as 3.00 18? Yes, they are roughly equivalent. A 90/90-18 tire and a 3.00-18 tire are both used for the same size rim, with minor variations in width. The first number represents the tire width, and they are close in size.
What size are my dirt bike tires? Without specific information, it’s challenging to determine your dirt bike’s tire size. Dirt bike tire sizes can vary depending on the make and model.
What size tire is a 250cc dirt bike? Most 250cc dirt bikes use tires with sizes like 80/100-21 on the front and 100/90-19 on the rear, but sizes can vary among different models.
Is 80 100 12 the same as 3.00 12? Yes, they are similar. An 80/100-12 tire and a 3.00-12 tire are used for the same rim size, and there is only a slight difference in tire width.
Is 80 100 18 and 2.75 18 the same? They are similar but not exactly the same. An 80/100-18 tire is slightly wider than a 2.75-18 tire.
Is 90 90 19 and 3.25 19 the same? No, they are not the same. A 90/90-19 tire and a 3.25-19 tire have different widths, with the 3.25-19 being wider.
How do I determine bike tire size? To determine your bike’s tire size, look for the markings on the sidewall of your current tires. The format will typically be something like “80/100-21,” where the first number is the width in millimeters, the second number is the aspect ratio (profile), and the third number is the rim diameter in inches.
How do I know my bike tire size? You can find your bike’s tire size by checking the markings on the sidewall of your current tires, as mentioned in the previous answer.
How do I choose a dirt bike tire? Choose a dirt bike tire based on your riding style, terrain, and bike model. Consult your bike’s manual for recommended tire sizes and types. Consider factors like tread pattern, compound, and tire size to match your riding needs.
How fast can a 2-stroke 250cc go? A 2-stroke 250cc dirt bike can reach speeds of approximately 70-85 miles per hour (112-137 kilometers per hour) depending on its make and model.
Is a 250cc dirt bike fast? A 250cc dirt bike is considered fast in off-road riding. It can reach high speeds suitable for motocross and trail riding.
Is a 250cc dirt bike too big for a 14-year-old? The suitability of a 250cc dirt bike for a 14-year-old depends on the individual’s experience, size, and skill level. Some 14-year-olds may handle it well, while others may find it too powerful. It’s important to consider safety and rider comfort when choosing a bike.
What is the difference between 90 100 10 and 3.50 10? A 90/100-10 and a 3.50-10 tire are close in size, with minor differences in width. The first number represents the tire width in millimeters, and they are similar.
What does 100 80 17 mean on a tire? The tire size 100/80-17 means the tire is 100 millimeters wide, has an aspect ratio of 80% (indicating the tire’s height relative to its width), and fits a 17-inch rim.
What does 90 80 mean on a tire? “90/80” typically refers to the width and aspect ratio of the tire, but it lacks information about the rim size. It may need additional numbers to specify the full tire size.
What does 80 90 17 mean on a tire? 80/90-17 means the tire is 80 millimeters wide, has an aspect ratio of 90%, and fits a 17-inch rim.
What is the alternative to 110 80 17? An alternative tire size to 110/80-17 could be 120/70-17 or 120/80-17, depending on your specific needs and the available options.
What does 120 80 18 mean on a tire? 120/80-18 signifies a tire that is 120 millimeters wide, has an aspect ratio of 80%, and fits an 18-inch rim.
What’s the difference between a 120 80 19 and a 120 90 19? The difference between these tire sizes is in the aspect ratio. A 120/80-19 tire is shorter and has a lower profile than a 120/90-19 tire, which is taller with a higher aspect ratio.
What does 90 90 19 mean? 90/90-19 means the tire is 90 millimeters wide, has an aspect ratio of 90%, and fits a 19-inch rim.
What does 90 90 18 mean on a tire? 90/90-18 means the tire is 90 millimeters wide, has an aspect ratio of 90%, and fits an 18-inch rim.
What makes a gravel bike different? A gravel bike is designed for off-road and mixed-terrain riding. It typically has a more relaxed geometry, wider tires, and features like disc brakes to handle various surfaces and terrain.
Can I put wider tires on my bike? The ability to put wider tires on your bike depends on your frame and fork clearance. Check your bike’s specifications to determine the maximum tire width it can accommodate.
What size bike tire for height? Bike tire size is not determined by rider height but by the bike’s frame and intended use. Rider height may influence frame size, but tire size should match the bike’s specifications.
How do you measure bike wheel size UK? Bike wheel size in the UK is typically measured in inches, with common sizes like 26″, 27.5″, and 29″ for mountain bikes, and 700c for road bikes.
What is the most common bike tire size? The most common bike tire size for road bikes is 700c, while for mountain bikes, 27.5″ and 29″ are common sizes.
How do you read tire sizes in inches? Bike tire sizes in inches are typically read as “X inches” where “X” represents the diameter of the tire. For example, 26″, 27.5″, and 29″ are common mountain bike tire sizes.
How do you tell if a dirt bike is the right size? A dirt bike is the right size if the rider can comfortably reach the ground with their feet while sitting on it, has proper control of the bike, and can safely manage the bike’s power.
Is a wider tire better on a dirt bike? Wider tires on a dirt bike can provide more stability and traction on loose terrain, but the choice depends on the rider’s preferences and the type of riding they do.
What size are dirt bike rear tyres? Dirt bike rear tires vary in size, but common sizes include 100/90-19, 110/90-19, and 120/90-19, depending on the bike model and purpose.
Are 2-strokes faster than 4-strokes? In some cases, 2-stroke engines can produce higher power-to-weight ratios, making them feel faster in certain situations, but it depends on factors like engine size and tuning.
How fast is 125cc in mph? A 125cc motorcycle can reach speeds of approximately 55-70 miles per hour (88-113 kilometers per hour) depending on the specific bike.
Is a 250 dirt bike too big for a beginner? A 250cc dirt bike can be suitable for some beginners, but it can also be too powerful for others. It depends on the rider’s experience, size, and comfort level with the bike’s power.
Is 250cc too much for a beginner? A 250cc motorcycle can be manageable for some beginners with previous riding experience, but it may be too much for those entirely new to riding. It’s essential to start with a bike that matches your skill level.
How far can a 250cc dirt bike go? The range of a 250cc dirt bike on a single tank of gas varies depending on the bike’s fuel efficiency and tank size but is typically around 60-100 miles (96-160 kilometers).
Where can you legally ride a dirt bike in the UK? In the UK, you can legally ride a dirt bike on private land with the landowner’s permission, at designated off-road tracks, or in areas where green laning or trail riding is allowed. Riding on public roads typically requires road-legal bikes.
Can a 13-year-old ride a dirt bike in the UK? The legal age for riding a dirt bike on public roads in the UK is typically 16. However, younger riders may be allowed to ride on private land or designated off-road tracks with parental consent and supervision.
Is a 450 dirt bike too much for a beginner? A 450cc dirt bike is generally too powerful for beginners with no prior riding experience. It’s advisable for beginners to start with a smaller and more manageable bike.
What is a 3.50 x10 tire equivalent to? A 3.50×10 tire is equivalent to a tire with a metric size of approximately 90/90-10. They are used for the same rim size.
What is P in bike tire size? The “P” in bike tire size typically indicates that it is a passenger car tire size designation and is not commonly used for bike tires.
What does 90 90 10 mean on a tire? 90/90-10 means the tire is 90 millimeters wide, has an aspect ratio of 90%, and fits a 10-inch rim.
What does 120 70 R17 mean? 120/70-R17 signifies a tire with a width of 120 millimeters, an aspect ratio of 70%, and it’s designed for a 17-inch rim. The “R” indicates that it’s a radial tire.
Is 25psi too low? Tire pressure of 25 psi could be too low or too high depending on the specific tire and bike. It’s essential to follow the manufacturer’s recommended tire pressure for your specific bike and tires.
What does R mean on a tire? The “R” on a tire indicates that it is a radial tire. Radial tires have fabric plies that run radially across the tire, providing a smoother ride and better handling.
What does 110 80 12 mean? 110/80-12 means the tire is 110 millimeters wide, has an aspect ratio of 80%, and fits a 12-inch rim.
Does tire ratio matter? Yes, the tire ratio (aspect ratio) matters as it affects the tire’s height and profile. A lower ratio results in a wider, flatter tire, while a higher ratio gives a taller, narrower tire.
What does 110 80 mean on a tire? 110/80 typically refers to the tire’s width and aspect ratio but doesn’t specify the rim size. You need additional numbers to determine the full tire size.
What does 130 90 16 tire mean? 130/90-16 signifies a tire with a width of 130 millimeters, an aspect ratio of 90%, and it fits a 16-inch rim.
What does 80 100 21 tire mean? 80/100-21 means the tire is 80 millimeters wide, has an aspect ratio of 100%, and fits a 21-inch rim.
What is the difference between 80 90 and 90 90 tires? The difference between 80/90 and 90/90 tires is in the tire’s width. An 80/90 tire is narrower than a 90/90 tire, with a smaller first number indicating a slimmer tire.
What alternate tire size can I use? The alternate tire size you can use depends on your bike’s specifications and the available options. Consult your bike’s manual or a professional for suitable alternatives.
How wide is 110 70 17? A 110/70-17 tire is approximately 110 millimeters wide.
What is the equivalent of 130 80 17? The equivalent of 130/80-17 in inches would be roughly 5.12 inches in width.
What does 110 90 18 mean? 110/90-18 means the tire is 110 millimeters wide, has an aspect ratio of 90%, and fits an 18-inch rim.
What does 120 70 tire size mean? 120/70 typically signifies a tire with a width of 120 millimeters and an aspect ratio of 70%, but it lacks information about the rim size.
What does 80 65 6 tire mean? “80/65-6” is not a standard tire size notation, and it appears to be incomplete or incorrectly formatted. Proper tire sizes typically include three numbers, such as “110/80-17,” which indicate width, aspect ratio, and rim diameter.
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