What does 70r mean on a tire?
Aspect Ratio. R – Designates the tire has radial construction. Wheel Diameter. Load Index. S – Speed Rating. An arrow points to the numbers 265/70R17 115T on the inner part of the tire sidewall. R stands for radial, 17 is the wheel diameter and 115T is the load index and speed symbol.Beyond width, there’s also a notable height difference to consider. The 275/60R20 tires measure 32. R20 tires — approximately 1.A 275/60R20 tire follows the standard sizing convention where each number represents specific dimensions. The 275 indicates the tire’s width in millimeters, while 60 represents the aspect ratio – meaning the sidewall height equals 60% of the tire’s width. The 20 designates the wheel diameter in inches.I was under the impression that 285s were what were commonly referred to as 33s, even though they are 32. Discount Tire). However, 295s are truly 33.A 285 tire measures exactly 20mm wider than a 265 tire, translating to approximately 0. This creates a 7. The wider footprint means more rubber touches the road, which affects traction, handling, and fuel consumption.
What does the Z stand for on tires?
The “Z” refers to the tire’s speed rating, which means it’s designed for higher-speed driving. Z-rated tires can handle speeds above 149 mph, but we’ll cover more about speed ratings below. The letters ZR on the sidewall relate to a tyre’s speed rating, which in this case is 150mph. That means it should not be driven at speeds in excess of 150mph (240kmph) – of course, where such speeds are even legal! Before 1990, ZR was used for high-performance tyres.