250-watt heating element creates strong, consistent heat. 110-volt operation for use with fixed power or trackside generating equipment. 7-foot-long fixed power cord for work accessibility. Perfect for grooving and siping tires used in dirt motorsports. Pistol grip design aids in cutting stability with or without heat. Includes #4 tool head and blades, other sizes available. Accepts all Speedway Motors and Ideal brand tool heads and blades. Multi-blade siper head can be used to cut six sipes at once. Depth of sipe adjustable by loosening blade screw and setting to desired depth. Grooving blades can be turned upside down to sipe the tire. Includes extra wide grooving head and blades. Maximize Your Tire’s Traction by Adding Grooves and Sipes If you race on dirt you know that track conditions change throughout race day and many will ask how to increase traction on tires. From a high grip surface that can be wet and slinging mud to a shiny black or even hard and dusty surface as the laps pile up and the sun goes down, tire traction can change dramatically. While there are different tire compounds you can choose from to aid in traction depending upon the track’s bite, one thing many experienced racers do is modify their dirt tires by adding grooves and sipes to the tread blocks using a heated tire grooving iron tool with a specific cutting head and blade attachment. What is tire siping and grooving? Well, grooving is just that, cutting grooves in the tread where you are removing rubber, while siping is where you make a thin cut (like a razor blade) but no material is actually removed. These cuts can be made in various widths and directions to enhance traction and get the tire up to temperature faster but can also be used to increase a tire’s longevity by helping it run cooler too. It is all in how the tire is cut