This will promote forward bite and help the tire “dig” into the track. I'm selling leftover, new American Racer tires/slicks on ebay right now and have no idea what to price them at. American Racer tires are part of a tradition of craftsmanship and innovation that dates back to 1915. So how do you decide then to groove or sipe a tire? We’ve all heard the war stories of teams getting caught using some ancient chemical recipe to soften tires. Early in the day when the track is heavy and wet, Hoosier recommends grooving a tire. Today, the company’s Scott Junod said they’re producing tires full force, and working hard to keep tires … Tracks like this with a bunch of debris and dust need to have grooves to sweep the debris away and maintain a good contact patch between the tire and track. “You need some groove width in order to clean the loose debris from the contact patch but we reduce the sipes because the wheel spin will generate heat and wear on its own. Obviously, a heavy track will behave far different than a black slick track. “When you groove or sipe a tire it not only increases grip, but it also increases wear on the tire,” Explained Fantozzi. Each racer should calculate what they wish to accomplish. Hell, it wasn’t to long ago Bloomquist himself was caught and banned for half a year from the World of Outlaw Late Model Series. The search for this grip will lead teams to do some wild things to their tires. 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Fantozzi summed it up the best, “I think the hardest part of grooving and siping is predicting what the track is going to do next. You can talk to five different people and get ten different patterns that they say are the best to groove into your tires. All rights reserved. Grooving will help channel the mud and debris out the tire to help maintain a good contact patch between the tire and track surface. If you are using a fairly hard tire, siping will help create a “graining” effect which will help keep the tire from “sealing” over. Altering tires by grooving and siping can maximize the amount of traction and enhance the performance of the tire. John has been around dirt track racing his entire life. Grooving also creates more edges for better traction or grip. “Reducing the number of sipes will reduce your trips to the tire truck… Did I just say that?”. Just as with siping, how much you elect to groove your tires depends on what you have experienced in the past along with watching what the top finishing drivers are doing as well. Shannon summed it up well by saying,  “If you look at 10 different tires, you will find 12 different ideas. The Answers: Isky’s Nolan Jamora Answers Your Tech Questions, Pt. If the track starts to dry out, then your variables increase. “On dry tracks, we normally use medium-width grooves with minimal sipes,” Rush explained to us. Early in the day when the track is heavy and wet, Hoosier recommends grooving a tire. Known around the globe for their quality, durability, repeatability, and value. These include, how hard or soft the tire is, how many laps you are planning on running on the set of tires, and how much the track is going to dry or rubber up are just a few that you have to consider. Unlike grooving, that helps cool the tire, siping is done to build heat in the tire. However, how to prepare a tire is dependent on many variables such as track conditions and how the track will change throughout the day. Hoosier recommends grooving a tire. Find out what it actually does to help performance out on the race track besides save money and help tire last longer.Feel free to subscribe and don't forget to follow us on social media: to our YouTube Channel: Racing Tips: out our products at follow us on social media: We all understand that no two tracks will dry out the same, some will rubber up, some will get crazy dusty and not take any rubber, and some will rubber up and get black and shiny with no dust. One of the most often overlooked pieces of equipment on any racing vehicle has to be the tires. To better understand the advantages of each, we first have to define just what is grooving and siping. All rights reserved. We will safeguard your e-mail and only send content you request. I avoid siping both directions as I think this leads to tires chunking on black, slick tracks.”. It is a ever changing study of how tires react to what that particular track is doing that night. However according to their website, “on tracks where you are not moving or throwing any dirt, but the surface is still relatively soft, a soft tire can often be run effectively with little or no grooving at all.”. Out of every handling adjustment that is made available to us on our vehicle of choice, they all work to help increase or decrease one thing – traction. Both Goodyear and Hoosier explained to us, that Proper siping will result in a nice texture or grain to the surface of the tire. Both companies are widely used throughout the dirt world, and each expert works closely with the biggest names in dirt track racing today. In fact, he was almost born at Monett Speedway in Monett, Missouri. Generally, you will still be on relatively soft tires on dusty, dry tracks so they don’t require as many sipes to perform well.”, Notice however, the complete focus of the tire changes once a track rubbers up, Rush went on to say, “Now, when a track truly rubber’s up, not just gets shiny and black, we shift our focus to tire conservation, not tire performance. Again, grooving helps reduce heat in the tire. Unlike siping in which you should go no deeper than 1/2 the depth of the tread block, grooving is a much thicker cut that can, and generally is, the full depth of the tread block. This is just a tip of the iceberg, ultimately at the end of the day, the way you become good at grooving and siping your tires is by doing your research and performing some trial and error. The grooves can be cut in a multitude of ways: Goodyear and Hoosier both expressed to us, that the decision to groove, sipe or both, is dependent on a ton of variables. This helps the tire dig into the racetrack (side bite) as the driver turns their car. If you have a notebook, you can write down what the track conditions were that night and provide detailed notes on what you did to your tires that night. Siping will also dissipate heat when the tire gets to operating temperature and the sipes open up. Grooving serves many purposes like helping to channel the dirt out the tire to help maintain a good contact patch between the tire and track surface–just like the grooves in your street tire which help keep your car from hydroplaning. Generally, to sipe a tire, the grooving blade is reversed to result in two independent cutting blades. On June 22, 2020, an electrical fire occurred at the Specialty Tires of America, Inc. factory in Indiana, Pennsylvania. However, if the track is taking rubber and is black slick, the track will get very abrasive and the tire can overheat and cause it to give up and not repeat. “The decision to groove or sipe, to me, depends on what I’m trying to accomplish from a specific tire and track combination,” explained Rush. “More is not always better when it comes to sipes. Grooving a tire makes the tread-blocks more flexible to the surface, and in these rough conditions the grooves really prove their worth. Each one of these scenarios can require different approaches when it comes to grooving or siping. Some people view the grooving and siping of tires as a black art, but ultimately it is something that can’t be learned over night.