What is 255 45R19 mean?
Therefore, the tire size 255/45r19 can be expressed in inches as roughly 10 inches wide, 4. R19 tire size explanation in this case, the tire’s width is 245 mm (9. 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 110.When it comes to tire sizing, the initial number is the tire width in millimeters. Therefore, a 255 tire is 255 millimeters wide, and a 265 tire is 265 millimeters wide. That’s a 10mm difference in width.Therefore, the tire size 255/45R20 can be expressed in inches as roughly 10 inches wide, 4.Aspect Ratio): The tire’s sidewall is 45% of the tire’s width, which means the sidewall is about 114 millimeters or just over 4 inches. R (Construction Type): Radial tire, the most common type of tire produced today. Wheel Size/Rim Diameter): Going from edge to edge, the tire’s diameter is 18 inches across.
What does 255/45 mean on a tire?
Tire Width): The tire width is 255 millimeters from sidewall to sidewall (just over ten inches). Aspect Ratio): The tire’s sidewall is 45% of the tire’s width, which means the sidewall is about 114 millimeters or just over 4 inches. In summary, a P255/45R18 103H tire would be a passenger tire with a width of 255 millimeters, a thickness or aspect ratio equal to 45% of the tire height which here is 114 millimeters. It is also a radially constructed tire with a diameter of 18 inches that can carry up to 1,929 pounds and can go up to 130 mph.
What is the 7 7 rule for tires?
If you leave them on too late, your winter tires will degrade quickly. So, when is the right time to swap? The rule of thumb is 7-for-7: wait until there are seven consistent days at 7 degrees Celsius. The reverse is also true for transitioning to winter. There is a general consensus that most tires should be inspected, if not replaced, at about six years and should be absolutely be swapped out after 10 years, regardless of how much tread they have left. Note that all tires have a manufacture date stamped on them.
What is the 3% rule for tires?
The 3% rule states that when replacing tires, the new tire’s diameter should not differ from the original by more than 3%. This guideline helps maintain proper vehicle performance, safety system functionality, and speedometer accuracy. Generally, tyres with 3mm of tread depth will last between 10,000 and 20,000 miles taking into account different road conditions. However, it is recommended that tyres with 3mm tread depth are replaced as quickly as possible.The performance of tyres deteriorates the more worn they become. In fact the difference in stopping distance between tyres with 4mm or tread and tyres with the legal minimum of 1. That is why it is recommended that they are changed once tread levels reach 3mm or less.