Tractor Tire Conversion Calculator

Here are common tractor tire size conversions:

• 16.9-28 (Inches) is approximately 420/85R28 (Metric) or 18.4-28 (Flotation).
• 11.2-24 (Inches) corresponds to 280/85R24 (Metric) or 14.9-24 (Flotation).
• 12.4-38 (Inches) is roughly 320/85R38 (Metric) or 16.9-38 (Flotation).

These conversions help you understand the same tire size in different measurement systems.

Inch Size (e.g., 16.9-28)	Metric Size (e.g., 420/85R28)	Flotation Size (e.g., 18.4-28)
11.2-24	280/85R24	14.9-24
11.2-38	280/85R38	14.9-38
12.4-24	320/85R24	16.9-24
12.4-38	320/85R38	16.9-38
13.6-28	340/85R28	18.4-28
14.9-24	380/85R24	20.8-24
14.9-38	380/85R38	20.8-38
16.9-28	420/85R28	23.1-28
18.4-38	460/85R38	26.5-38

FAQs

How do you calculate tire ratio on a tractor? The tire ratio on a tractor is typically expressed as a series of numbers on the tire’s sidewall, such as 16.9-28. The first number (16.9) represents the tire’s width in inches, and the second number (28) represents the rim diameter in inches. To calculate the tire ratio, you can divide the tire’s width by the rim diameter, which in this case would be approximately 16.9 / 28 ≈ 0.61.

Can I put bigger tires on my tractor? Yes, you can often put bigger tires on your tractor, but it’s essential to consider factors like clearance, compatibility with the tractor’s specifications, and potential effects on performance. Consult your tractor’s manual or a tire specialist for recommendations.

How do you convert tire width to inches? Tire width is typically already expressed in inches on the tire’s sidewall. There’s usually no need for conversion. For example, a tire marked as 16.9 indicates a width of 16.9 inches.

How do you read a tractor tire size number? A tractor tire size number, such as 16.9-28, consists of two parts. The first part (16.9) is the tire’s width in inches, and the second part (28) is the rim diameter in inches.

What is the formula for tire ratio? Tire ratio is calculated by dividing the tire’s width (first number) by the rim diameter (second number) in the tire size. For example, 16.9-28 has a tire ratio of approximately 0.61 (16.9 / 28).

What is the ratio of front to rear tires on a tractor? The ratio of front to rear tires on a tractor can vary depending on the tractor’s design and intended use. There is no fixed standard ratio, and it can range from 1:1 to other proportions depending on the tractor model and application.

How much can I upsize my tires? The extent to which you can upsize your tractor tires depends on several factors, including the tractor’s specifications, clearances, and intended use. Consult your tractor’s manual or a tire specialist for guidance on safe tire upsizing.

How much bigger tire can I use? The maximum tire size increase depends on the tractor model, available space, and compatibility with the tractor’s specifications. It’s best to consult the tractor’s manual or a tire expert to determine the safe and appropriate tire size increase.

Why are the rear tires on a tractor so large? Rear tires on tractors are often larger than front tires to distribute weight more evenly, provide traction for heavy loads, and reduce soil compaction in agricultural applications. Larger rear tires also offer better stability and grip.

How do you translate tire size? To translate a tire size, you simply read the numbers on the tire sidewall. For example, in the size 16.9-28, 16.9 represents the width in inches, and 28 represents the rim diameter in inches.

Is it OK to change tire width? Changing tire width can be acceptable if done within the manufacturer’s recommended range and with consideration for the tractor’s specifications. Consult the tractor manual or a tire specialist for guidance.

Can I use tires with different width? Using tires with different widths on a tractor can affect stability and performance. It’s best to use tires that match the manufacturer’s recommendations or consult a tire expert for guidance.

What do the three numbers on a tractor tire mean? Tractor tire sizes are typically represented by two numbers, such as 16.9-28. The first number (16.9) indicates tire width in inches, and the second number (28) represents rim diameter in inches. If you have three numbers, the third number may indicate the tire’s ply rating or load-carrying capacity.

How do you read rear tractor tire size? Rear tractor tire size is read in the same way as any tractor tire size: by looking at the numbers on the tire’s sidewall. The first number is the width in inches, and the second number is the rim diameter in inches.

How wide is a 16.9 tractor tire? A 16.9 tractor tire typically has a width of approximately 16.9 inches.

What is tire magic formula? Tire magic formula refers to mathematical models used to describe the behavior of tires under various conditions, including traction, slip, and cornering. These models help engineers and researchers understand tire performance.

Does tire ratio matter? Tire ratio can impact a tractor’s performance and stability. Choosing the right ratio for your tractor and its intended use is important for safety and efficiency.

How do tyre sizes work? Tire sizes are typically expressed as a combination of numbers and letters on the tire’s sidewall, indicating width, aspect ratio, construction type, and rim diameter. Understanding these numbers is crucial when selecting tires for specific applications.

What is the axle ratio of a tractor? The axle ratio of a tractor refers to the gear ratio in the tractor’s rear axle assembly. It determines how many times the driveshaft must rotate to turn the tractor’s wheels once. Axle ratios can vary depending on the tractor model and intended use.

Can you put bigger front tires on a tractor? You can put bigger front tires on a tractor, but it’s essential to consider the tractor’s specifications and clearances to ensure compatibility and safe operation.

Why are tractor tires smaller in the front? Front tractor tires are often smaller to allow for better maneuverability and steering control. Smaller front tires also reduce soil compaction when used in agriculture.

What happens if you put tires that are too big? Using tires that are too big for your tractor can lead to clearance issues, reduced maneuverability, and potential damage to the tractor’s components. It’s essential to choose appropriately sized tires.

Do larger diameter tires ride better? Larger diameter tires can provide a smoother ride by absorbing more shocks and bumps. However, the ride quality depends on various factors, including tire construction and inflation pressure.

What happens if tires are too big? If tires are too big for your tractor, they can cause clearance issues, interfere with steering, and affect the tractor’s overall performance and safety.

Can you inflate tires too much? Inflating tires beyond the recommended pressure can lead to reduced traction, uneven tire wear, and a harsh ride. It’s essential to follow the manufacturer’s recommended tire pressure.

Do bigger tires give a smoother ride? Bigger tires can provide a smoother ride due to their larger contact area and better shock absorption. However, other factors, such as tire type and inflation pressure, also play a role in ride quality.

Is the front or back of a tractor heavier? The front or rear of a tractor can be heavier depending on its design and configuration. Agricultural tractors often have heavier rear ends to provide traction and stability.

What is the difference between front and rear tractor tires? Front tractor tires are typically smaller and designed for steering and maneuverability. Rear tractor tires are larger and provide traction and weight distribution for heavy loads and field work.

What are the advantages of putting dual rear tires on your tractor? Dual rear tires provide increased traction, reduce soil compaction, and improve stability when carrying heavy loads or operating in soft terrain. They also distribute weight more evenly.

How do I know my tire size UK? Tire size in the UK follows a similar format to other regions, usually displayed as a combination of numbers and letters on the tire’s sidewall. For example, 205/55R16 indicates width, aspect ratio, and rim diameter.

How do you read tire sizes UK? Reading tire sizes in the UK involves interpreting the numbers and letters on the tire’s sidewall, which convey information about width, aspect ratio, construction type, and rim diameter.

Why are tractor tires loaded? Tractor tires are loaded with ballast (e.g., liquid, weights) to improve traction, stability, and overall performance, especially when working with heavy implements or in challenging terrain.

Are bigger rear tires better? Bigger rear tires on a tractor can provide better traction, reduce soil compaction, and improve stability when working in agricultural or off-road applications.

Why are tractor tires different? Tractor tires are designed differently for various purposes, including providing traction, distributing weight, and minimizing soil compaction. Their design reflects the specific demands of agricultural and industrial tasks.

What happens if the tire is wider than the wheel? If a tire is significantly wider than the wheel it’s mounted on, it may not seat properly, leading to a loss of tire pressure, damage to the tire bead, and safety hazards. It’s crucial to use compatible tire and wheel sizes.

What are the disadvantages of wider tires? Wider tires can increase rolling resistance, reduce fuel efficiency, and potentially decrease maneuverability in certain conditions. They may also be more prone to hydroplaning on wet roads.

How much of a difference does tire width make? Tire width can significantly impact a vehicle’s handling, traction, and fuel efficiency. A wider tire may provide better traction but could affect fuel consumption and ride quality.

Does the middle number on tires matter? The middle number in a tire size represents the aspect ratio, which is the height of the tire’s sidewall as a percentage of its width. It affects the tire’s profile and can influence ride comfort and handling characteristics.

What is the most common tractor tire? The most common tractor tire size varies depending on the region and specific agricultural or industrial applications. However, sizes like 16.9-28 and 18.4-38 are frequently used in agricultural tractors.

How do you tell how old a tractor tire is? You can determine a tractor tire’s age by examining the DOT (Department of Transportation) code on the sidewall. The last four digits of this code indicate the week and year of manufacture.

What does F2 mean on tractor tires? “F2” on tractor tires typically denotes the tire’s tread pattern or designation. It’s essential to consider the specific characteristics and applications associated with that tread pattern.

How do I choose a tractor tire? Choosing a tractor tire involves considering factors like tire size, tread pattern, load capacity, and the tractor’s intended use. Consult your tractor’s manual and seek advice from tire specialists for guidance.

How do you measure a tractor rim width with a tire? To measure a tractor rim width with a tire mounted, you’ll need a caliper or a measuring tape. Measure the width of the rim from one bead seat to the opposite bead seat on the inside of the tire.

How do you match tractor tires? Matching tractor tires involves selecting tires that are appropriate for your tractor’s specifications, application, and operating conditions. Consult your tractor’s manual and seek professional advice for proper tire selection.

How wide is a 14.9 tractor tire? A 14.9 tractor tire typically has a width of approximately 14.9 inches.

How wide are 20.8 tractor tires? A 20.8 tractor tire typically has a width of approximately 20.8 inches.

How wide is an 18.4-30 tractor tire? An 18.4-30 tractor tire typically has a width of approximately 18.4 inches.

What is the penny trick for tires? The penny trick is a simple test to check tire tread depth. Insert a penny into the tire’s tread with Lincoln’s head facing downward. If you can see the top of Lincoln’s head, it’s time to replace the tire.

How are tires calculated? Tire dimensions, load ratings, and other specifications are determined by tire manufacturers through engineering and testing processes to meet safety and performance standards.

What is tire M&S? “Tire M&S” stands for “Mud and Snow,” indicating that the tire is suitable for use in muddy and snowy conditions. It’s a common designation for all-season or winter tires.

What is the 3 percent rule on tires? The 3 percent rule suggests that you should avoid changing your tire diameter by more than 3 percent when selecting a new tire size. Significant changes can affect speedometer accuracy and handling.

How much difference in tire size is acceptable? Acceptable differences in tire size depend on your vehicle and its specifications. It’s generally best to stay within the manufacturer’s recommended tire size range to maintain safe and optimal performance.

Does a taller tire affect gear ratio? Yes, installing taller tires can effectively change your vehicle’s gear ratio, potentially leading to decreased acceleration and altered speedometer accuracy. This change may affect performance and fuel efficiency.

How do you read tire size for dummies? To read tire size, look at the numbers and letters on the tire’s sidewall. For example, P205/55R16 indicates width, aspect ratio, tire type (R for radial), and rim diameter.

What does V mean on tires? The “V” on tires represents the speed rating, indicating the maximum speed the tire can safely sustain. V-rated tires are typically designed for higher-speed vehicles.

What does the Y mean on tires? The “Y” on tires also represents a speed rating, indicating an even higher maximum speed capability compared to lower-speed-rated tires.

What is the gear ratio of a tractor tire? The gear ratio of a tractor’s rear axle assembly is specific to the tractor model and design. It determines how many times the driveshaft must rotate to turn the tractor’s wheels once.

What is the ratio of tractor tires? The ratio of tractor tires refers to the tire size, which is typically expressed as the width (first number) divided by the rim diameter (second number). For example, a 16.9-28 tire has a ratio of approximately 0.61 (16.9 / 28).

What happens if my front tires are bigger than the back? Having larger front tires than rear tires can affect the balance and handling of a vehicle, potentially leading to stability issues and steering difficulties. It’s essential to maintain proper tire size ratios.

Should I get a wider tire in the front or back? Whether you should get wider tires in the front or back depends on the vehicle’s design and intended use. It’s best to follow the manufacturer’s recommendations or consult a tire specialist for guidance.

Can you put bigger front tires on a tractor? Yes, you can put bigger front tires on a tractor, but it’s crucial to consider compatibility with the tractor’s specifications and clearances to ensure safe operation.

Can I put bigger tires on my tractor? Yes, you can often put bigger tires on your tractor, but it’s essential to consider factors like compatibility, clearances, and potential effects on performance. Consult your tractor’s manual or a tire specialist for recommendations.

What happens if tires are the wrong size? Using tires that are the wrong size for your vehicle can lead to handling problems, reduced traction, and potential safety hazards. It’s crucial to use the correct tire size for your vehicle.

Do larger diameter tires ride better? Larger diameter tires can provide a smoother ride by absorbing more shocks and bumps. However, ride quality also depends on other factors, such as tire construction and inflation pressure.

What happens when you increase tire diameter? Increasing tire diameter can affect your vehicle’s gear ratio, potentially leading to changes in acceleration and speedometer accuracy. It’s essential to consider these factors when upsizing tires.

Does a wider tire give a smoother ride? Wider tires can offer a smoother ride by providing a larger contact patch with the road, which improves shock absorption and stability. However, ride quality also depends on tire construction and inflation pressure.

Do bigger tires increase fuel consumption? Bigger tires can increase fuel consumption due to their higher rolling resistance. The engine may need to work harder to move larger, heavier tires, which can reduce fuel efficiency.

Is it OK to go down a tire size? Going down a tire size can affect your vehicle’s handling, traction, and ride quality. It’s generally best to stick to the manufacturer’s recommended tire size for optimal performance.

What happens if you inflate your tires to max PSI? Inflating your tires to the maximum PSI listed on the tire sidewall can lead to a harsh ride, reduced traction, and increased risk of a blowout. It’s essential to follow the manufacturer’s recommended tire pressure.

Is it better to overinflate or underinflate tires? Neither overinflating nor underinflating tires is ideal. It’s best to maintain the recommended tire pressure specified by the manufacturer for safe and optimal performance.

Should I increase my tire pressure for a heavy load? You should consult the vehicle’s manual for recommendations on adjusting tire pressure for heavy loads. In some cases, it may be necessary to increase tire pressure to accommodate the additional weight.

What size tires give the best ride? The size of tires that provides the best ride depends on your vehicle’s specifications, suspension system, and intended use. Consult the manufacturer’s recommendations for the ideal tire size.

How much does tire size affect ride quality? Tire size can significantly affect ride quality by influencing shock absorption, handling, and traction. Choosing the right tire size for your vehicle and application is essential for a comfortable ride.

Do you go faster or slower with bigger tires? Bigger tires can affect your vehicle’s speedometer accuracy, making it read slower than your actual speed. However, your actual speed relative to the road remains the same.

Why do you put weights on the front of a tractor? Weights are added to the front of a tractor to improve traction, balance, and stability, especially when using heavy rear-mounted implements or working on uneven terrain.

How do I stop my tractor from bouncing on the road? To reduce bouncing on the road, you can adjust tire pressure to the manufacturer’s recommendations, ensure proper tire balance, and consider adding suspension enhancements or using shocks designed for tractors.

Why would front weights be fitted to a tractor? Front weights are fitted to tractors to improve stability and prevent wheelies when heavy rear implements are attached. They help balance the tractor’s weight distribution.

What is the ratio of tractor tires to the front and back? The ratio of tractor tires between the front and back can vary depending on the tractor’s design and intended use. There’s no fixed standard ratio, and it depends on the tractor model and application.

What is the difference between R1 and R2 tractor tires? R1 and R2 are tread designations for tractor tires. R1 tires have a deep, aggressive lug pattern for maximum traction, primarily used in muddy or soft soil conditions. R2 tires have a less aggressive lug pattern for improved road and hard surface performance.

Why are tractor tires smaller in the front? Smaller front tractor tires allow for better maneuverability and steering control. They also reduce soil compaction when used in agricultural applications.

Why run duals on a tractor? Running dual rear tires on a tractor improves traction, spreads the load over a larger area to reduce soil compaction, and enhances stability, especially when carrying heavy loads or working in soft terrain.

Are super singles better than duals? Super singles (single, wide tires) are an alternative to dual rear tires and are designed to offer similar benefits, such as reduced soil compaction and improved stability. The choice between the two depends on the specific application and preference.

Why would you double tires? Doubling tires (using dual rear tires) on a vehicle, including tractors, provides added traction, load-carrying capacity, and stability, which is beneficial for tasks involving heavy loads or challenging terrain.

How do I know my exact tire size? You can find your exact tire size by reading the numbers and letters on the tire’s sidewall. It will typically be in the format of numbers/numbers-letters-numbers (e.g., 205/55R16).

How do I know my tire size number? Your tire size number is typically found on the tire’s sidewall and consists of a series of numbers and letters, such as 205/55R16, indicating width, aspect ratio, tire type, and rim diameter.

How do I find my tire size? You can find your tire size on the sidewall of your tire. It is a combination of numbers and letters that provide information about the tire’s dimensions and specifications.