Late Model tire grooving clarification announced 

VINTON, Iowa (March 21, 2023) – IMCA officials have announced a clarification to the tire grooving rule for Late Models. 

Specifically, only the horizontal and/or the vertical line of the cross can be grooved. Grooving must be done with a number 2 grooving blade only.

“There have been a number of questions about how the NLMT3 Hoosier tire can or should be grooved. Drivers can reference the picture accompanying this story,” said IMCA President Brett Root. “This is something we felt needed to be addressed now, with the first sanctioned Late Model events of the season  just a couple weeks away.”