What does 115T mean on a tire rating?
The 115T signifies that the tire has a 4ply standard load sidewall. The 121S signifies a 10 ply load range E sidewall. The standard load tire is best for a half ton truck, whereas the load range E sidewall is best for a 3/4 and 1 ton truck. Thanks, BWT. The number ‘115’ refers to the load index of the tire. This index indicates how much weight each tire can safely carry when properly inflated. In this case, a load index of 115 means that each tire can support up to 2,641 pounds (or approximately 1,200 kilograms).
What is the speed rating S on a tire?
A tire’s speed rating indicates the optimal speed that the tire can safely maintain over time. In short, it’s the fastest speed a tire can handle before it no longer performs as designed. The higher the speed rating, the better control and handling you’ll have at higher speeds. Generally, the higher in the alphabet a tire is rated, the better it will manage heat and faster speeds.P: Tires with a P rating, cannot go faster than 93 mph. Q: Q tires are usually winter studded or studless tires and should not exceed 99 mph. R: For heavy-duty LT trucks, the rating may be R, which indicates a speed limit of 106 mph. S: Family vans and sedans use the rating of S to indicate speed maximums of 112 mph.The system is a lettered code, and letters correspond to speeds. Your rating is clearly displayed on the sidewall of your tyre. Most standard consumer vehicles fall under the speed rating of S or T (for 112 or 118 mph limits).
What does the 115 mean on a tire?
It’s the tire depth as a percentage of the width. So 32/115 means nominal width of 32 mm and a tire wall height approx 115% of that (i. And 37/110 means a width of 37 mm and height 110% of that, which is ~41 mm. The 275/60R20 tires measure 32. R20 tires — approximately 1. This affects ground clearance, speedometer accuracy, and overall vehicle stance. The choice between these tire sizes depends on your specific driving needs and vehicle requirements.The 285/60R20 is both wider and taller than the 275/60R20. With 10mm additional width (285mm vs 275mm), the 285/60R20 provides a larger contact patch. Overall diameter increases from 838mm to 850mm (+12mm or +1%). Sidewall height also grows by 6mm (171mm vs 165mm) due to the proportional relationship with width.The 275 tire is narrower, usually quieter, and better on gas. The 285 tire is wider, offering better grip and handling. That 10mm difference might not seem like much, but it changes the ride in ways you’ll feel every time you turn the wheel.When comparing tires with identical aspect ratios, a 285 tire typically measures 0. The height difference becomes more pronounced with different aspect ratios – a 275/65R17 versus a 285/70R17 shows approximately 1.