8/6/2021
WISSOTA
8/3/21 WISSOTA Late Model Tire Rule Extension
08/03/2021 - WISSOTA Late Models may continue to cut the pre-molded cross marks in the W30 for the remainder of the 2021 season. All other information from the update on 06/23/2021 will remain. A #1 grooving head and blade is recommended to replicate the original groove. No siping or pinning/needling is permitted on any tire. Aggressive, nail or traction-inducing sipe grinding will result in disqualification pre- or post-race. Softening tires is not allowed.
Submitted By: Carson Gramm