What does z mean on tyres?
Much like the ZR17, the letter prior to R stands for the speed rating of the tyre. Z means that the tyre can go above 150MPH. Elsewhere on the tyre will be the maximum speed rating of the tyre, it could be a H, V, W or Y.ZR tires are designed for high-speed performance, capable of speeds over 149 MPH, while R tires are built for everyday driving with speed ratings up to 106 MPH. ZR tires offer superior grip and handling but have a shorter lifespan of about 48,000 miles compared to R tires’ 65,000 miles.R means radial – which 99. There is another letter that is added to this – the speed rating. A ZR code means that it has the highest speed rating available – well over 150MPH. Other speed ratings have limited top speed allowances.Check out the key differences: ZR Tires: Speed 💨: Designed for high speeds over 149 MPH (240 KPH). Performance 🚀: Superior grip and handling, perfect for sports cars. Tread Life ⏳: Typically last around 48,000 miles. Maintenance 🔧: Requires frequent rotations (every 5,000-7,500 miles).
What does 225-40R19 mean?
The 225/40R19 93W tire has the following features: the first three digits refer to the width of the tire in millimetres. The second two-digit number refers to the ratio between the height of the sidewall and the width of the tire. R stands for “Radial” and the last two figures 19 indicate the wheel diameter in inches. R indicates the construction used within the tires casing. R stands for radial construction. B means belted bias and D stands for diagonal bias construction. The last dimension listed in the size is the diameter of the wheel rim, which is most often measured in inches.Internal Construction After the aspect ratio, there will generally be a letter – either R, D, or B. This refers to the internal construction of the tire. R stands for radial, the industry standard for most passenger vehicles today. D means diagonal construction, while B signifies belted bias construction.
What does the Z mean in 225 40ZR18?
The symbol ‘Z’ in the tire size 225/40ZR18 shows the tire is intended for a high speed rating. The ZR rating is used for high-performance and sports tires that need enhanced performance at higher speeds. Originally, Z was used to show the tire that can easily handle speeds over 149 mph. 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.ZR tires deliver precision and performance at high velocities, offering unparalleled grip and responsiveness, whereas R tires provide enduring reliability, comfort, and safety for everyday driving conditions.Some drivers wonder, Can you mix ZR and R tires? Mismatched tires can contribute to uneven handling and unexpected traction, particularly when hard braking or turning is involved.