The Blizzak LM001 RFT (Run Flat Technology) is Bridgestone's Performance Winter / Snow tire designed to provide temporary self-supporting run-flat mobility in the case of complete air loss due to a puncture during winter driving. Designed for the drivers of sports cars, sporty coupes and performance sedans, the Blizzak LM001 RFT is meant to help drivers maintain their vehicle's appearance, handling and mobility during the winter months by providing traction on cold, dry, wet and snow-covered roads. Blizzak LM001 RFT tires feature an advanced tread compound to enhance cold-weather traction. This compound is molded into a directional design for improved evacuation of water and slush, aiding in confident grip and braking traction in cold, wet and wintry conditions. The Lamellen edge effect and 3-D sipes improve winter traction without resorting to traditional metal studs. This allows Blizzak LM001 RFT tires to combine winter traction, H-, V- or W-speed rated capability and the temporary extended mobility of run-flat tires. Blizzak LM001 RFT winter tires meet the industry's severe snow service requirements and are branded with the three-peak mountain snowflake (3PMSF) symbol. To help you know when it's time to replace your winter tires, Bridgestone molds winter wear Indicators (also known as snow platforms) into the Blizzak LM001 RFT's main tread grooves to identify when winter traction will be reduced, because the tire's tread has worn down to the point where the remaining depth becomes less effective at digging through snow, gripping icy roads or coping with slushy conditions.Install Bridgestone Blizzak LM001 RFT tires in sets of four only.Due to the traction capabilities of the Blizzak LM001 RFT, Bridgestone recommends using Blizzak LM001 RFT tires in sets of four to provide the best handling characteristics and tire performance. Related Information: What is the three-peak mountain snowflake symbol (3PMSF)? | Learn more about how important tread depth is for winter weather traction