Tires are the single biggest performance modifier in autocross. Are you setting yours up for success or leaving time on the table? In this episode of the SCCA Shop Manual, we’re joined by Bob tunnell, Chief Steward at the SCCA Solo Nationals, to break down the essential tire secrets every amateur racer needs to know. Whether you’re just starting your autocross journey or chasing trophies at Nationals, understanding how to read your tires is key to faster lap times. In this video, you’ll learn:The Baseline Pressure Rule: A simple starting formula based on your vehicle’s weight.
Reading Tire Wear: How to interpret tire shoulder wear to confirm your pressure is dialed in.
Adjusting Handling: Techniques to induce oversteer or increase stability by tweaking front and rear tire pressures.
Managing OPR: How to deal with “Other People’s Rubber” buildup, especially on concrete surfaces like Lincoln Air Park.
Camber Basics: Identifying when your tire wear patterns indicate a need for a suspension alignment adjustment.
Don’t let improper tire setup ruin your run. Watch, learn, and get more speed out of your car at your next event!