Here's a quick overview of the classes. I don't think there's anything here that will change. However, I'm still waiting on some details from the track owners about the schedule before I post the entire guidelines.
But here's a snapshot of each class. More specifics will be in the final Guidelines.
General Rules
You can run either front wheels (same guidelines as 2016) or front wheel stickers on the body in the 4" Flexi Classes
JK Indy Cars - Based on the Ready-To-Run car (Same as 2016)
JK Hawk 7 motor
JK 251172 RTR Chassis
Spec Gear ratio - 64-pitch gears - 10:37
JK 6113 body (.010 thick) - Max Rear wing height is 1 9/16" (40mm)
Minimum weight of 101 grams
4" NASCAR (Same as 2016)
JK Hawk Retro motor
Stamped steel chassis - may use aluminum pans
Black rear tires - No speed rubber or bulldogs
Front tires minimum .500" diameter (two-piece - no wing thingies)
1/8" or 3/32" rear axle. 48-pitch or 64-pitch gears. Any ratio
JK or Parma NASCAR body. (List of bodies is unchanged from 2016 and is in the Guidelines.) Minimum thickness is .007. Minimum 1/8" front and rear bumper. Molded plastic interior
JK LMP (Same as 2016)
JK Hawk Retro motor
Stamped steel JK chassis - may use aluminum pans
JK plastic-hub rear tires - No speed rubber
Front tires minimum .500 diameter (two-piece - no wing thingies)
1/8" or 3/32" rear axle. 48-pitch or 64-pitch gears. Any ratio
JK LMP body. Minimum thickness is .007. Minimum 1/16" front bumper and 1/4" material across the back. Molded plastic interior.
GTP (Added the JK Hawk 6 as an option - otherwise the same as 2016)
JK Hawk 7 motor or JK Hawk 6 motor
Stamped steel chassis - may use aluminum pans
Black rear tires - No speed rubber or bulldogs
Front tires minimum .500" diameter (two-piece - no wing thingies)
1/8" or 3/32" rear axle. 48-pitch or 64-pitch gears. Any ratio
JK, Parma, or Red Fox GTP body. (List of bodies is unchanged from 2016 and is in the Guidelines.) Minimum thickness is .007. Molded plastic, Mylar, or paper interior
Enduro GT Coupe (Changed from a GTP body to a GT Coupe body - otherwise the same as 2016)
Hand-out motor TBD
JK Cheetah 21 chassis - may open the back of the motor mount to allow for better gear mesh
Black rear tires - No speed rubber or bulldogs
Front tires minimum .500" diameter (two-piece - no wing thingies)
1/8" or 3/32" rear axle. 48-pitch or 64-pitch gears. Any ratio
JK Ford GT40 Mk IV, Lola T70 Coupe, and Lola T70 Sunoco. Parma Marcos Manta and Lola T70 Coupe. Red Fox Chaparral 2F. (List of bodies with part numbers is in the Guidelines) Minimum thickness is .007 (I think!!). Molded plastic interior
Minimum weight of 101 grams
GRRR Can-Am and Formula 1 - Spring/Summer (I think those are the two classes .... need to confirm)
Will follow GRRR/IRRA® rules that are in place at the time of the race
