Product Summary

110 volts Voltage, 250 watts Wattage

    Comes as a Kit

    Key Specs

    MFG. Part #91605125
    BrandIdeal Heated Knives

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    Ideal Heated Knives 91605125 Details

    • 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 multi-cut siping head and blades
    • Includes #3, #4, and #8 grooving heads and blades
    • Accepts all Speedway Motors and Ideal brand tool heads and blades
    • Depth of groove/sipe adjustable by loosening blade screw and setting to desired depth

    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. Learning how to cut a tire with a tire groover and sipe your own tires is a bit of a black art, but a good racer will keep a logbook of modifications and can reflect on past track conditions to see what size groove and angle worked best previously. The same goes for tire siping. Often you can lean on a fellow racer for grooving and DIY tire siping advice or reach out to the tire manufacturer for suggestions on how its tire products react to certain grooving and siping cuts. Regrooving tires that have been sanded down and brought back to life is one way to save some money in your race budget too versus buying new rubber for your race car.

    Built Tough to Handle Any Tire

    Grooving tires and siping tires on your dirt racer takes some effort, but the Ideal Heated Knives 125 tire groover tool is built to take it. Ideal starts off with a robust heating element that outputs a consistent heat and housed it in a tough steel shell with chrome-plated steel tip. The fiberglass-reinforced polymer handle keeps your hands safe from the extreme heat found at the head of the cutting tool. Ideal then added a fully grounded UL-listed power cord that is a generous 7-feet in length.

    This tire cutting tool is designed to work with all Ideal Heated Knives and Speedway Motors brand tire grooving iron heads and blades that we carry, so while this kit includes three of the most popular grooving sizes, additional head and blade sizes are available, along with our multi-blade siping head.

    Grooving and Siping Your Tires Could not be Easier

    We carry a full lineup of cutting blades and heads (the heads and blades must match in size and used together) for the Ideal tire grooving iron. You will install the head into the tool first, followed by the matching cutting blade. Set the depth of your blade before plugging the iron in and it gets hot. Generally, you will want your sipes to be 1/8-inch to 3/16-inch in depth and no more than 1/2 the depth of the tread block. Most racers will find having more sipes on the front tires and less on the rear is the best combination.

    Sipe spacing is also determined by the size cutting blades used, with the further apart the sipes the cooler the tire will run. When cutting your grooves, you want them to be at full depth. Width of the grooves and direction will vary depending upon track conditions and whether you are grooving a front or rear tire (rear tires are usually grooved straight across and front tires are grooved at a slight angle to improve forward bite and warm the tire more quickly).

    Make the Move and Start Improving Your Tire’s Traction Today

    While siping your tires takes some trial and error and an ability to read a track surface, in the end, grooving and tire siping dirt track racing tires with additional grooves and sipes is just another tool in a racer’s toolbox of tricks and tips to help them get to the front of the pack and stay there until the checkered flag drops. It does not matter if you are racing a Late Model or Sprint Car, doing some competitive rock crawling, rally racing, or even mud drags, modifying your tires with this Ideal tire grooving iron and kit is sure to benefit your racing program by providing the ideal tire, making your tires grip the surface better and put just the right amount of heat into them.


    Sanctioning bodies that allow tire grooving/siping (in specific classes) include IMCA, Wissota, USRA, USMTS, UMP


    1 Year

    Ideal Heated Knives 91605125 Specifications

    MFG. Part #91605125
    BrandIdeal Heated Knives
    Voltage110 volts
    Wattage250 watts
    Sold in QuantityKit