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. What temperature is too cold for all-season tires? All-season tires begin to lose flexibility and traction once temperatures drop below 45°f (7°c). That’s when winter tires provide a noticeable performance and safety advantage.
What tire aspect ratio is best?
Choose a lower aspect ratio (40-50%) for precise road feedback and high-performance driving on smooth roads . A medium tire aspect ratio (55-65%) is optimal for control and comfort in daily commutes on passenger vehicles. Similarly, we only recommend changing the aspect ratio by 5% either side of your cars preferred size. For example, a car designed to take a 60 aspect ratio tire could also fit a 55 or 65 aspect ratio. In winter it is very common to ‘downsize’ tires – this is making the width slightly smaller.
What is the most commonly used tire size?
R17 Why It’s Popular The 225/65R17 has earned its position as America’s most common replacement tire size through practical benefits and smart market positioning. Tire Width In the examples above (P225/60R16 95S and LT235/75R15 96H), the section widths are 225mm and 235mm, respectively. So, in general, the larger the number the wider the tire.R17 tires have a diameter of 28. The sidewall of the tire is 5. This means a 225/65R17 tire will make make 708 revolutions per mile, or 440 revolutions per kilometer.Tire Number Meaning: Size For example, 215/55R17 91V means: 215 – This is the tire’s width in millimeters from sidewall to sidewall. This is the aspect ratio, which is the tire’s sidewall height as a percentage of the tread width. R – This indicates the tire construction (“R” means radial).