For example, a 150/80R16 87H tire has an “87” load rating or 1201 lbs. The tire marking also indicates the load rating, which is a measurement of how much weight can be carried by the tire. Rim diameter is the diameter of the wheel on which the tire will be mounted, in inches. Traction is usually not as good at higher speeds on low-rated tires, but if you are running a stock or near-stock vehicle with an engine tuned for street use then you don’t need a high-performance tire. Higher speed ratings generally provide better handling characteristics, while lower-speed rated tires give the best ride and longest tread life. Speed ratings are based on three test speeds: The maximum design speed, which will usually be limited by handling considerations a lower value corresponding to standard service rideability and treadwear requirements for passenger cars at 60 mph (97 km/h) and an even lower limit often set at 45 mph (72 km/h). SPEED RATINGĪ speed rating provides the maximum speed the tire is designed to be used. But keep in mind that as a result, they’ll be heavier than skinny tires. The taller your tires and more round they are, that will help you get stability on cornering or braking. The aspect ratio is the height of the tire profile, taking into account the tread in % of its width – in this case, 70% of 120 mm = 84mm. Keeping these three measurements is important because they can affect how a tire fits on the rim, which in turn can affect performance. These two sets of numbers refer to the width in millimeters (width), height in inches (highway speed), and rim size diameter respectively. Motorcycle tire sizes are typically expressed as a series of letters and numbers, such as 120/90-17 or 200/55R16. This article will break down the most common motorcycle wheel sizes and help you make an informed decision on which size is right for your needs! HOW TO READ MOTORCYCLE TIRE SIZE With so many different sizes available, it’s hard to know which one you need for your bike. Motorcycle wheel sizes can be confusing to a new rider. Heritage Softail, Deluxe, Springer Classic Softail Standart, Custom, Night Train, Springer Super Glide, Low Rider, Street Bob, Super Glide Custom Road King (except Classic), Electra Glide
Road King (except Classic), Electra, Street, Road Glide
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