TIRE DIAMETER x TIRE WIDTH – RIM DIAMETER. Skid steer tires are not measured the same as a typical, everyday tire you’ll find on a car or truck. Skid steer tires, both inflated and solid, come in sizes such as 31×10-20, meaning the tire diameter is 31”, the tire width is 10”, and the rim diameter is 20”. Ameritrax sells solid skid Deciphering Tire Sizing. Lawn tractor tire sizes can seem a tad cryptic, but they follow a general pattern. For instance, a size reading ’15×6.00-6′ can be broken down as: 15: This is the tire’s diameter in inches. 6.00: This indicates the tire’s width in inches. 6: This denotes the rim size in inches the tire is designed to fit. Tire Size. The biggest set of numbers on your tire sidewall make up your tire size. Using tire size P205/65R15 from the image above as an example, let's learn how to read your tire size. P - The letter at the beginning of the tire size is the tire type. Depending on the type of vehicle you drive, you will need a tire that accommodates it’s needs. The first number indicates the tire’s diameter in inches (in this case 35 inches tall). The next number (12.50) is the width and the “R” that follows indicates that this is a radial tire. The last number (20) is the wheel diameter in inches. LT denotes that it is a light truck tire, as opposed to a passenger (P) tire. 1 Key Takeaways. 2 Where to Find the Tire Size. 3 How to Read Tire Sizes. 3.1 The First Letter: Tire Types — P225/50R17 98H. 3.2 The Next Few Numbers: Width of Tire—P225/50R17 98H. 3.3 Numbers After the Slash: Aspect Ratio—P225/50R17 98H. 3.4 The Following Letter: Internal Construction Type/Tire Type—P225/50R17 98H. Width. The first number on your tyre tells the cross-sectional width, in millimeters, from sidewall to sidewall. The width directly affects the tyre’s contact patch—the portion of the tyre that makes contact with the road. Wider tyres generally provide more contact area, which can enhance traction and handling, especially in dry conditions. #tyre #size #dimensions #motorplanetTyre dimensions explained | How to read tyre dimensionsThe tyre size might read like this: P195/55 R15 81 H. Hardly user The first number in our lawn tractor tire size is 15. This number refers to the overall diameter of the tire or the tire height. In this example our tire will be roughly 15" inches tall. The second number in our lawn tractor tire size is 6. This number refers to the width of the tire. This tire has a height equal to 65% of its width. R indicates radial construction. 15 is the wheel size. This tire fits on a 15-inch wheel. 95H is the load index and speed rating. The 95 is the load rating, which shows how much weight the tire can handle. H is the speed rating, which ranges from A to Z ratings. How to Read a Tractor Tire Size . Locate your tire size on the sidewall of the tire (see picture above). The first number(16.9) represents the tire width sidewall to sidewall in inches. The second number(30) represents the rim diameter in inches. How to Read a Metric Tractor Tire Size . Metric Size Conversion Example: Tire Size – 280/85R24 AFDq.