You’ve heard about food shortages and computer chip shortages but now a tire shortage results in Virginia Motor Speedway canceling an event scheduled for this coming weekend. Track officials say they tried their best to get tires for the 2021 FASTRAK World Championships but the main supplier and alternates could not provide enough rubber for the number of cars expected to participate. The track still plans to hold the annual Run-A-Muck Mud Bog will be held on Oct. 2.