CALCULATOR

TIRES

For Stock and Street Class, only GTRadial SX2/HPY and Michelin Primacy HP are allowed

Extremely high grip street tires are subject to board assessment in terms of their point penalty

ENGINE AND DRIVETRAIN

AERODYNAMICS

Since aerodynamic mods can be varied in form/function, they may warrant individual assessment by the 86DC board

SUSPENSION

WEIGHT REDUCTION

TIRE SIZE

Class limits:

Class Max Width
Sport NA
Stock 225
Street 245
Touring 265
Unlimited NA