Tires and compared them to tires with about 432 3mm of remaining tread depth followed by sets with the legal minimum of 232 16mm depth. To gauge tread depth all you need is a quarter.
You can see as the tire approaches 632 the tread blocks are noticeably smaller circumferential grooves are shallower and the sipings for ice traction are much smaller.
Tire tread depth new tires. For example a typical tire that starts with 1032 of original tread depth has only 832 of useable tread depth. Its useable tread depth is calculated by subtracting a worn out tires 232 from the new tires original depth of 1032. The final 232 of a tires tread depth.
New tire tread depth is the measurement typically published by tire manufacturers but its not the same as usable tire tread depth. Most states and tire manufacturers consider tires to be bald when one or more of their grooves are worn down to 232. So if you start with a new tire tread depth of 1032 the actual usable tread depth is 832.
For example a typical tire that starts with 1032 of original tread depth has only 832 of useable tread depth. Its useable tread depth is calculated by subtracting a worn out tires 232 from the new tires original depth of 1032. The final 232 of a tires tread depth isnt What Your Change is Telling You About Tread Depth.
Average new tires used on cars typically start with 1032 to 1132 of original tread depth. Dedicated winter snow tires and light truck tires typically are deeper for light truck tires how much deeper depends on the tires tread type Highway Rib Highway All-Season Off-Road All-Terrain or Off-Road Maximum Traction. In the United States tire tread depth is measured in 32nds of an inch.
New tires typically come with 1032 or 1132 tread depths and some truck SUV and winter tires may have deeper tread depths than other models. Department of Transportation recommends replacing tires when they reach 232 and many states legally require tires to be replaced at this depth. The idea of the penny test is to check whether youve hit the 232 threshold.
As an example of different tire diameters resulting from tires worn to different tread depths we compared two 22545R17-sized tires a new tire with its original tread depth of 1032-inch and a second tire worn to 832-inch of remaining tread depth. Interpreting tire tread depth as it relates to traction and safety Keep in mind that even if your tires have more than the minimum 232 of tread depth remaining or even 432 thats not reason to put your tire situation to back of mind and move on. Tire tread depth is critical to driving safety in a variety of road conditions.
Tires and compared them to tires with about 432 3mm of remaining tread depth followed by sets with the legal minimum of 232 16mm depth. The differences surprised us. Vehicles equipped with the 232 minimum tire tread depth took about 100 more feet to stop and were still traveling at about.
The new 22545R17-sized tire has a calculated diameter of 2497 a circumference of 7844 and will roll 835 times each mile. The same tire worn to 832-inch of remaining tread depth is calculated to be 18 shorter with a diameter of 2484 have a circumference of 7804 and will roll 839 times per mile. Minimum tire tread depth is legislated throughout most of the United States and Europe.
Speed reduction for wet road conditions is notA survey of state requirements for legal minimum tread depth for passenger vehicle tires in the United States is presented. Most states require a minimum of 232 of an inch approximately 16 mm of tread but. Winter Tread Depth - When to Stop Using Tires in Snow and on Ice at new tread depth worn to 632 and then worn to 232.
You can see as the tire approaches 632 the tread blocks are noticeably smaller circumferential grooves are shallower and the sipings for ice traction are much smaller. Tire Racks advice is that if rain and wet roads are a concern you should consider replacing your tires when they reach approximately 432 of remaining tread depth A typical passenger car tire has about twenty square inches of total footprint surface and begins with about 13 of tread depth. To gauge tread depth all you need is a quarter.
Put George Washingtons head into one of the big grooves. If the top of his head is flush with the tread you have about 432 inch of tread left. Low tread depth on car tires can be a factor when it comes to hydroplaning so whats a quick way to check your tread.
How to check your tire tread depth. Updated February 1 2021 931 PM. Andrew Cuomo D has long bragged about New Yorks response to the COVID-19 pandemic crafting a foam mountain and writing a book in.
Scottys Automotive Service advises that the best way to stay safe on the road is to replace your tires when you need new ones. Heres how to test your tire tread depth at home. You can get a general idea of your tire tread depth with a penny or a quarter but its important to understand that this test is not accurate.
New tires have an average tread depth of 8 to 9 millimeters 1032 to 1132 inches. As you drive the tread will wear down. A tire with a tread depth below 16 millimeters 232 inches lacks grip.
Braking distance and vehicle control are impaired. Tire tread below this depth greatly reduces your stopping ability and hydroplaning resistance. Discount Tire recommends replacing tires worn at or below 432nds.
Penny Tread Depth Test The penny test can show if your tread depth has worn below 232nds of an inch.