National Micro-Mini Tractor Pullers Assoc.
PRO STOCK TRACTOR
CLASS INFO
Originates from 1/16 scale 2 wheel drive tractor WEIGHT CLASSES: 3lb. & 5lb. MAX.
WHEELBASE: 8"
LENGTH LIMIT (Center of rear axle forward): 10 1/2" MAX.
NUMBER ENGINES: 1 MAX.
ENGINE DISPLACEMENT (Cubic inches): .07
THROTTLE CABLE ALLOWED
TIRE DESIGN: Black rubber only 35 durometer or higher
MAX. TIRE SIZE: 1 5/8" x 4 1/4"
MAX. HITCH HEIGHT: 1 1/4"
MIN. HITCH LENGTH (Center of rear axle to back of hitch hole): 1 1/8"
TWO WHEEL DRIVE
Replicates 2 wheel drive road vehicle
MAX. WEIGHT: 4lbs.
MAX. WHEELBASE: NO LIMIT
LENGTH LIMIT (center of rear axle to front of vehicle): 12"
MAX. NUMBER OF ENGINES: 1
MAX. ENGINE DISPLACEMENT(cubic inches): NO LIMIT
THROTTLE CABLE ALLOWED
TIRE DESIGN: OPEN
MAX. TIRE SIZE: 2 1/2" x 3 1/2"
MAX. HITCH HEIGHT: 1 1/4"
MIN. HITCH LENGTH(center of rear axle to back of hitch hole) 1 1/8"
MAX. GEAR RATIO: 300:1
SUPER STOCK TRACTOR
Originates from 1/16 scale 2 wheel drive tractor
MAX. WEIGHT: 5lbs.
MAX. WHEELBASE: 8"
LENGTH LIMIT (center of rear axle to front of vehicle): 10 1/2"
MAX. NUMBER OF ENGINES: 1
MAX. ENGINE DISPLACEMENT (cubic inches) : .15
THROTTLE CABLE ALLOWED
TIRE DESIGN: OPEN
MAX. TIRE SIZE: 3"x5"
MAX. HITCH HEIGHT: 1 1/4" MIN.
HITCH LENGTH (center of rear axle to back of hitch hole): 1 1/8"
FOUR WHEEL DRIVE
Replicates 4 wheel drive road vehicle
MAX.WEIGHT: 6lbs.
MAX. WHEELBASE: 8 5/8"
LENGTH LIMIT (center of rear axle to front of vehicle): 13"
OVERALL LENGTH: 16"
MAX. NUMBER OF ENGINES: 1
MAX. ENGINE DISPLACEMENT (cubic inches): .15
THROTTLE CABLE ALLOWED
TIRE DESIGN: OPEN
MAX. TIRE SIZE: 1 1/2" x 3"
MAX. HITCH HEIGHT: 1 1/4" MIN.
HITCH LENGTH (center of rear axle to back of hitch hole): 2 1/2"
FRONT TIRES MUST BE CENTERED IN WHEEL WELLS
UNLIMITED TRACTOR
MAX. WEIGHT: 6lbs.
MAX. WHEELBASE: NO LIMIT
LENGTH LIMIT: 18" MAX.
NUMBER OF ENGINES: NO LIMIT
MAX. ENGINE DISPLACEMENT: NO LIMIT
THROTTLE CABLE ALLOWED
TIRE DESIGN: OPEN
MAX. TIRE SIZE: WIDTH OPEN x 6" DIAMETER
MAX. HITCH HEIGHT: 1 1/4" MIN.
HITCH LENGTH (center of rear axle to back of hitch hole): 1 1/8"
SEMI "BIG RIG"
MAX. WEIGHT: 7lbs.
RECOGNIZABLE TRUCK BODY
LENGTH LIMIT: 18"
MAX. NUMBER OF ENGINES: ONE
MAX. ENGINE DISPLACEMENT: NO LIMIT
ENGINE MUST STAY INSIDE THE BODY, ONLY THE EXHAUST OR CYL HEAD MAY BE OUTSIDE THE BODY
THROTTLE CABLE ALLOWED
TIRE DESIGN: OPEN
MAX. TIRE SIZE: WIDTH 3" x 3" DIAMETER if running singles, 1 1/2" x 3" if running duals
TANDEM DRIVE AXLES ARE ALLOWED, MAX DISTANCE BETWEEN DRIVE AXLES 4 1/4"
MAX. HITCH HEIGHT: 1 1/4" MIN.
HITCH LENGTH (center of rear axle to back of hitch hole) : 1 1/8"