Polar, Cylindrical and Spherical Coordinates.Introduction to Cartesian Coordinate Systems.Introduction to Geometry: Points, Lines and Planes.Percentage Change | Increase and Decrease.Mental Arithmetic – Basic Mental Maths Hacks.Ordering Mathematical Operations - BODMAS.

Common Mathematical Symbols and Terminology.Special Numbers and Mathematical Concepts.How Good Are Your Numeracy Skills? Numeracy Quiz.Maintaining the proper tire pressure will help you extend the life of your tires. Selecting a dependable, quality tire is just the beginning. Whether or not the mud and snow designation is important will depend on the climate in which you live and drive.Īlong with looking at the tire code, it is important to follow your vehicle manufacturer’s recommended specifications to assure safety and best vehicle performance. The speed rating shows the maximum speed your tires can handle, which tends to be more important in countries with roadways that are not subject to speed limitations. In order for a tire to receive the Mud and Snow designation, it must meet specific RMA geometric requirements.Ī tire with the correct tire load index for your vehicle means you that your tires are made to handle the weight of your vehicle. Similar markings for this include MS, M&S, and M/S. When a tire has M+S on it, that means that it meets the Rubber Manufacturers Association (RMA) guidelines for a mud and snow tire. In this case, the 93 load index represents 1,433 pounds, and the speed rating of V represents 149 mph.Īll-Season Tires with Mud and Snow Designation The tire performance index is displayed after the wheel diameter, and represents the tire’s load and speed ratings. Tire Code – Performance Index, Speed Rating, and Mud and Snow Designation With this post, we complete our look at tire code with an explanation of the last three parts of the uniform tire code: load index, speed rating, and M + S designation. The first post focused on the type of tire and section width and the second post looked at aspect ratio, tire construction and wheel diameter. This code not only identifies the tire, it also provides useful information about the tire. The uniform tire code is imprinted on nearly every vehicle tire manufactured.

What does m and s mean