What does a 305 tire equal to?
The first number in the tire size, 305, represents the width of the tire in millimeters. To convert this to inches, we divide 305 by 25. This gives us approximately 12 inches. R22 tires have a diameter of 31. The sidewall of the tire is 4.R22 Tire Size Explanation A 35-aspect ratio means that the tire’s height is 35% of its width (in this case it is 106.
How big is a 305-45 R22 tire?
R22 Tire Size Explanation In this case, the tire’s width is 305 mm (12. The aspect ratio is expressed as a percentage of the tire’s height to its width. A 45-aspect ratio means that the tire’s height is 45% of its width (in this case it is 137. Keep in mind that there is no actual difference between 275/40R20 and 275/40ZR20; it is the same Size. Likewise, Tires with different ratings (for example 105W vs 106Y) are the same Size as well, just intended for different vehicles. Thank you for your interest.
What does 45 R mean on a tire?
Aspect Ratio. R – Designates the tire has radial construction. Wheel Diameter. Load Index. V – Speed Rating. The Z in ZR indicates a high-speed rating (above 149 MPH), while R stands for radial construction. Modern ZR tires include specific speed ratings like V (149 mph), W (168 mph), and Y (186 mph). The R designation is common to most modern passenger tires, indicating radial construction.
What do zr and r mean on tires?
The Z in ZR corresponds to an old label used by manufacturers to indicate that the speed index is higher than V, i. Thus, a ZR tyre has a speed index of V, W, or Y. R indicates that the structure is RADIAL. So, VR indicates that the tyre has a RADIAL structure and a speed index equal to V. 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.A “Z” rating can mean different things. While it nearly always means a high performance tire for high-performing sports cars, “Z” may actually appear in the middle of a tire’s size information. When it does, it represents either a maximum speed of more than 149 mph (240 kph) or 186 mph (300 kph).