What is the 7 7 rule for winter tires?
To make sure you’re getting the most out of your winter tires, be sure to switch between summer or all-season tires and winter tires at the correct time. By using the handy 7℃ rule: always try to change your winter tires when the average temperature begins to rise above 7℃. Nonetheless, the recommended time to switch over to Winter Tires should be late September to early November.
What is the 3% rule for tires?
As a general rule, you want replacement tires that are within 3 percent of the diameter (height) measurement of the tires originally on your vehicle. A 265/65R18 tire has 65 percent of width of 265mm as its sidewall height while a 275/70R18 tire has sidewall height of 70 percent of 275mm. R: This letter means radial construction which is a standard in modern tires.The 33×12. R20 and 275/60r20 tires have nearly identical overall diameter with only 0.