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D1 MIDDLE WEST DIV. 2025
Changes to the event
<Changes in vehicle regulations>
2025 Middle West Division tire size regulations
For the 2025 event, the following tire regulations will be mandatory for participation.
Regional Class Participation Regulations
Tire size: Tire width up to 235
* There are no regulations other than width this year.
* All tires used in the tournament will be of the above size.
The size of the tires to be used will be confirmed during vehicle inspection on the day of the event.
We may provide certification for use (marking).
Inquiry regarding tire regulations
Q1: What is the size specification?
A1: This year, tire width is limited to 235mm (there are no other restrictions).
Q2: Do I only specify the size of the rear tire?
A1: All tires used in local races will be limited to 235mm, so the size of both front and rear tires will be limited to 235mm.
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