Original Tread Depth

…of original tread depth and has worn off 4/32" (down to 6/32" of remaining tread depth) is 50% worn. 10/32" original tread depth -2/32" legally worn out tread depth 8/32" of useable tread depth. 8/32" useable tread depth -4/32" measured tread depth worn away 4/32" of remaining tread depth (50%…

…different tread depths. As an example of different tire diameters resulting from tires worn to different tread depths, we compared two 225/45R17-sized tires, a new tire with its original tread depth of 10/32-inch and a second tire worn to 8/32-inch of remaining tread depth. The new 225/45R17-sized…

…that the rear tires will still have about 1/2 of their original tread depth remaining when the front tires are completely worn out. Intuition suggests that since the front tires wore out first and because there is still about half of the tread remaining on the rear tires, the new tires should be…

…four) due to a lack of maintenance or when equivalent tread wear can't be achieved through periodic tire rotation. While it can't make up for performance differences due to tread depth, it is most important to match new tires to those originally used on the vehicle when replacing tires in pairs. The…

…Specs Explained: Revolutions Per Mile * Tire Specs Explained: Rim Width Range for Street / Highway Tires * Tire Specs Explained: Tread Depth * Tire Specs Explained: Tread Width Measuring * Tire Specs Explained: Maximum Load * Tire Specs Explained: Section Width * Tire Specs: Globalized Standards…

…Pressure Markings Original Equipment (OE) Tires Original Equipment Tire Designations P-Metric & Euro-Metric Tire Sizing Plus Size Wheels & Tires Porsche N-Specification Tire Approvals Rubber Cracking Selecting the Right Tires Shaving Tire Treads to Maintain Equivalent Tread Depths for Four-Wheel…

…Tread Depth with a Tire Gauge While U.S. coins can be used to estimate remaining tread depth as a tire approaches the end of its useful life, the established method of measuring remaining tread depth in the U.S. is with a gauge that reads in 32nds of an inch (other countries measure tread depth in…

…tread depth. Mixing tire brands, tread designs and tread depths may cause components in the vehicle's driveline to fail. What does a driver do if one tire has to be removed from service when it and the other three tires have already worn between two-thirds to one-half of their original tread depth?…

…Explained: Revolutions Per Mile * Tire Specs Explained: Rim Width Range for Street / Highway Tires * Tire Specs Explained: Tread Depth * Tire Specs Explained: Country of Origin * Tire Specs Explained: Maximum Load * Tire Specs Explained: Section Width * Tire Specs: Globalized Standards SERVICE WITH…

…different tread depths. As an example of different tire diameters resulting from tires worn to different tread depths, we'll compare two 225/45R17-sized tires, a new tire with its original tread depth of 10/32-inch and a second tire worn to 8/32-inch of remaining tread depth. The new 225/45R17-sized…

…gradually drops by about 20% during the life of a tire as the tread wears from its original molded depth to worn out. This can be attributed to the reduction in tread mass and rubber squirm, as well as subtle hardening of the tread compound during years of service and exposure to the elements.…

…tread designs are especially helpful in increasing hydroplaning resistance when relatively wide Plus Two, Plus Three or Plus Four tire and wheel applications result in fitting a much wider tire to a vehicle than its Original Equipment size. Test Report Video: Panic Stopping: How Much Tread Depth Do…