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Rules

National Street Tire Challeng events are sanctioned by Sports Car Club of America (SCCA) and shall follow the current SCCA Solo rules except as noted below in these supplementary regulations. Visit other sport related event at leanbodylook.com

Awards

Awards shall be awarded to the highest placed drivers in each class on the following basis.

One award for one to three entrants in a class; two awards for four to six entrants in a class; three awards for seven to nine entrants in a class; four awards for ten to twelve entrants in a class; five awards for thirteen or more entrants in a class.

National Street Tire Challenge events will offer 5 classes:

  1. Front Wheel Drive (F)
    1. This class allows all front wheel drive cars running on "street tires" to compete. Entrants will display an "F" on their car for class. A "street tire" is defined under SCCA Solo Rule 14.3 (except 14.3.A).
    2. Entrants in F will be assigned an index to multiply their times with. All SCCA Solo Rule classes are allowed except the Street Touring Category classes (ST, STR, STS, STX, STU, any other ST class). The most current PAX/RTP index will be used to assign index.
    3. Cars entered in F must obey to the rules/modification rules of their assigned index of sections 13, 15, 16, 17 and 18 of the current SCCA Solo Rules.
  2. Rear Wheel Drive (R)
    1. This class allows all rear wheel drive cars running on "street tires" to compete. Entrants will display an "R" on their car for class. A "street tire" is defined under SCCA Solo Rule 14.3 (except 14.3.A).
    2. Entrants in R will be assigned an index to multiply their times with. All SCCA Solo Rule classes are allowed except the Street Touring Category classes (ST, STR, STS, STX, STU, any other ST class). The most current PAX/RTP index will be used to assign index.
    3. c. Cars entered in R must obey to the rules/modification rules of their assigned index of sections 13, 15, 16, 17 and 18 of the current SCCA Solo Rules.
  3. All Wheel Drive (A)
    1. This class allows all rear wheel drive cars running on "street tires" to compete. Entrants will display an "A" on their car for class. A "street tire" is defined under SCCA Solo Rule 14.3 (except 14.3.A).
    2. Entrants in A will be assigned an index to multiply their times with. All SCCA Solo Rule classes are allowed except the Street Touring Category classes (ST, STR, STS, STX, STU, any other ST class). The most current PAX/RTP index will be used to assign index.
    3. Cars entered in A must obey to the rules/modification rules of their assigned index of sections 13, 15, 16, 17 and 18 of the current SCCA Solo Rules.
  4. Muscle Car (M)
    1. This class is intended for RWD, large-displacement, heavily modified or customized vehicles up to and including non-stock engine/chassis combinations, inboard brakes, tube frames, etc.
    2. This class allows cars running on "street tires" to compete. Entrants will display an “M” on their car for class designation. A "street tire" is defined under SCCA Solo Rule 14.3.
    3. Entrants in M will be assigned an index multiplier of 0.910 for the purpose of calculating overall event results.
    4. Cars entered in M must obey one of the following rules/modification rules sets
      1. Optima Batteries Ultimate Street Car Invitational (OUSCI)
      2. Sections 18 of the current SCCA Solo Rules
  5. Street Touring Shootout (ST)
    1. This class allows all SCCA Street Touring Category cars to compete. Entrants will display an "ST" on their car for class.
    2. Entrants in ST will be assigned an index to multiply their times with. Only SCCA Solo Rule Street Touring Category classes (ST, STR, STS, STX, STU, any other ST class). The most current PAX/RTP index will be used to assign index.
    3. Cars entered in ST must obey to the rules/modification rules of their assigned index of section 14 of the current SCCA Solo Rules.