13th Annual KRC Winter Scale Points Series
* Scale Points Sheet * Score Sheet * Liability Release Waiver *
KRC Scale Rules for use in the Keystone RC Club Winter Series
This is a Scale Points event and trucks need to be teched in.
This rulebook is intended to standardize scale off road RC competitions that are held at KRC Comps.
These rules are written to outline the basis for building vehicles and running courses.
Anyone attempting to circumvent the spirit of the rules, as determined by the Event Officials, will be subject to rejection from the event.
This is a 6 event series. Points will carry across the series. Worst even score in each class will be tossed. Your other 5 will be added together for your total series score. Lowest score wins the series.
50 Points per course for a DNS
40 Points per course for a DNF
40 points per course max penalty per course - your gate bonus - your scale points = your course score
3 courses per class, add the 3 scores together for your event score. Lowest score wins.
C1 - max 60 scale points
C2 - Max 30 scale points
Drivers Class - 42 Scale Points Required, Cash pay out per event
C3 - Max 30 scale points
General Vehicle Details:
• You are encouraged to go above and beyond to make your truck as scale as possible.
• Vehicles accessories must resemble 1:1. Event Officials have full discretion to determine if a vehicle is
accepted and how scale points are scored.
• You must run a rail chassis in Class 1 & Class 2. Class 3 can run a tube chassis but it must follow all C3
chassis specs. (Rail Chassis example: Bruiser/Mountaineer, SCX-10, Reign RC K2-3S, 3L, 4, 5, MFM,
Trail, CR-01, UTE, etc...). No TVP (twin vertical plate) chassis' or frame rail extensions on a TVPs. Tub
chassis are allowed, but chassis must be covered by the body and follow all other scale rules per class
guidelines. An example of a tub chassis vehicle is CC-01, DF01, Twin Hammers, etc.
• Multi axle vehicles allowed in all classes and may use more than one front steering axle (front axles are
considered any axles forward of the centerline of the skid), rear steer only allowed in modified class,C3.
• Rear steering(RS) or dig is allowed in modified class only, C3.
• No "Motor On Axle" (MOA) of any kind. All motors, transmissions, and other electronics (other than
steering servos) must be chassis or frame mounted. Your axles must be driven by one transmission or
transfer case and a minimum of two drive shafts (except CC-01, TA-02, etc) No separate throttle control of
drive shafts or axles.
• Wheels larger than 2.2 are not allowed in any class and no short course style wheels with split diameters.
• Wheels must resemble a 1:1 type wheel. Translucent/clear materials, exposed foams or front side stand
off construction are not legal in any class.
• No bolt on or stick on external axle or knuckle weights of any kind.
• Any functional recovery tools you wish to use during your run, you must carry it on your rig at all times. IE
tow strap, pull pal, and sand ladders.
• Winching can only be performed off of natural objects (i.e. trees, rocks, etc...), other vehicles, or stakes
supplied by the course builder. Winching off of a person such as their shoe or hand is not allowed.
• All vehicles must have the motor, transmission, and electronics covered and hidden when viewed from
the top and sides. Batteries must be chassis mounted and should be hidden from view.
• Exposed Brass/Bronze parts should be painted for a scale appearance, but paint isn’t required.
• Winches are HIGHLY recommended!!!!! Expect to use a winch.
• Water proofing is HIGHLY recommended!!!!! Expect your rig to get wet.
Tires:
Tires should be scale appearing, if it is questionable have it reviewed before the event, or plan to run a
different tire. As new competition specific tires are released the ban list may be updated. Tire size will be
determined by advertised manufacturer specs (tires without available specs will be measured off the truck
as mounted on the wheel laid flat).
Tire Modification:
• Class-1 Street: No external tire modification is allowed.
• Class-2 Trail: Tire lugs may be removed, siped, grooved and/or trimmed.
• Class-3 Modified: Tire modifications are permitted, as long as the tire is no larger than 5.75" in diameter
measured off the vehicle laying on its side, and all tire parts are from a legal scale tire.
Tire Ban List:
• Losi Claws, Boss Claws and bashers
• Hot Bodies Rovers and Sedonas
• HPI Rock Grabbers
• Panther Cougars and Leopards
• Pro-Line Chisels
• Pro-Line Ibex
• RC4WD X-Locks, Crazy Crawlers and Rocklin
• Imex Skulls and Bones
• Ottsix Voodoo Pins
• JConcepts Ruptures
Class 1
Class 1 - Description:
• AKA: Street. A street legal off-road vehicle that you would drive to work or the trailhead and outfit like
an expedition vehicle such as the Camel Trophy truck D90 rigs.
Class 1 Requirements:
Gates will be a minimum of 11" wide (so mind your width).
Requirement Details
CMS Vehicle must utilize a Chassis Mounted Steering (CMS) setup.
Windshield Vehicle must have a windshield that fills the entire frame
Bumpers Full width bumpers are required on the front and rear of the vehicle, bumpers
that are molded into the body qualify.
A rear bumper is not required on a flatbed, but can be added for additional
scale points.
Bumpers must be at least as wide as the widest part of the
windshield.
Wheelbase Wheels must be aligned within the center of the body wheel wells within (+/-
1/2 inch total combined)
Body Requirements
• Only mild trimming is allowed, such as removing: flairs, trim, molding & a
hardtop. A vehicle’s stock bumper may be replaced with a chassis mounted
bumper and material may be removed in front of the front wheel up to the
stock bumper height. If the vehicle does not have a stock bumper, this area
can be trimmed to the lowest light or grill bezel. Material behind the rear
wheel well may be trimmed up to the bottom of the tailgate. An interior is
required if the top is removed.
• Bodies should be mounted in a realistic position in relation to the chassis
(like a 1:1 would be).
• Any removal or bending of material from behind the front wheel well (except
trim/molding) is considered a boat side.
• Bobbing a truck bed is allowed.
• Tires can not extend beyond the body’s bumpers or the rear of any truck
bed. (Any stingers, fairleads, shackles, bolts, etc. are not considered part of a
bumper when determining this.)
Tires:
• 106mm / 4.19" Max tire size including spares.
• No external tire modification is allowed.
• The tread cannot extend past the wheel wells more than 1/2 of the tread
width (flairs can be used to reach min. spec).
Chassis:
• Vehicle must run a full length rail chassis (The rail chassis must be as long
as the vehicles wheelbase)(Tamiya CC-01 chassis are allowed).
• Truggies are not allowed, flatbeds with full length rail chassis are allowed.
The bed must be as wide as the cab up to the point that the rear tires end,
and must be at least 2/3 the width of the cab at its narrowest. Cab only not
allowed.
• Chassis must have metal frame rails with a Maximum Vertical Rise of 2"
and ZERO "Sporty Lean". Must be a single rail per side, however adjustable
length chassis (like the Ascender) are Class 1 legal. All chassis must have a
skid plate that is parallel to the rockers. If present, shock hoops must be
bolted, brazed or welded to chassis.
The following modifications are prohibited in Class 1:
Boat sides, dovetailing, or narrowing of the body is not allowed.
Class 2
Class 2 – Description:
• AKA: Trail. A stock vehicle that has been modified to become a capable trail rated rig and is not
necessarily street legal.
Class 2 - Details:
Gates will be a minimum of 12" wide (so mind your width).
Use this table to determine if your vehicle is legal, and use the column on the left as a checklist.
Requirement Details:
Minimum Height Body/cage work must be at least 4.5" tall (including boat sides) and
the inside of the front tires cannot extend outside of the width of the
cab at the doors.
Bumper: A front bumper is required and must be mounted to the vehicle's rail
chassis and must be wider than the outside of the chassis rails
(chassis cross rails do not count as bumpers).
Chassis:
You must run a full rail chassis, and the chassis (including bumpers)
must be 3" longer than the wheelbase (this includes a chassis with a
truggy rear frame).
Chassis must have frame rails with a Maximum Vertical Rise of 2"
and 12 degrees or less of "Sporty Lean" skid angle.
Must be a single rail per side, however adjustable
length chassis (like the Ascender) are legal.
All chassis must have a skid plate that is parallel to the rockers.
Tires:
• 120mm / 4.75" max tire size with a 2.2 max rim size including spare.
• Tire lugs may be removed, siped, grooved and/or trimmed.
Chassis and body Modifications:
Body Modifications 2 of the 3 following modifications are allowed:
• Dovetailing the rear *a truggy/tube bed that is narrower than the cab
counts as a dovetail* (1/2 the width of the widest part of the cab).
• Boat sides (no more than 1.25" measured vertically from the bottom
of the skid).
• Pinching the front (2/3 the width of the widest part of the cab).
Truggies:
Truggies are allowed but must meet all of the following requirements:
• The ladder frame must be replaced with tube behind the cab.
• This tube must extend past the rear axle pumpkin.
• The bed must have a roll bar hoop and integrated shock mounts
which is a structural part of the vehicle.
No bare frame rails. Must be a truggy style or have some kind of bed covering the frame rails.
Flatbeds:
Flatbeds that run the full length of the rail chassis are allowed. The
bed must be as wide as the cab up to the point that the rear tires end,
and must be at least 2/3 the width of the cab at its narrowest.
Class 3
Class 3 – Description:
AKA: Modified An off-road vehicle that you would build from the ground up and might see in a
TTC/KOH type competition
Class 3 - Details:
Gates will be a minimum of 16" wide (so mind your width).
Minimum Tire Size:
4.8" tire or taller. 1.9 or 2.2 wheel allowed. 5.75"" max tire. No pin tires.
Chassis:
No Chassis limits as long as it as at least as long as the wheelbase of the vehicle (no twin vertical plates)
No Skid restrictions.
No Motor on Axle.
Full tube chassis rigs are allowed.
Width:
Rock sliders, mirrors, etc. do not count in these measurements:
• There is no maximum width, but gates will be a minimum of 16" wide.
• The body must be at least 5" wide from the front to the rear of the
doors.
Length Body/Chassis must be at least as long as the wheelbase of the vehicle.
Body:
Must have a body or be a tube chassis with body panels.
Cab Only allowed.
Tires:
No Pin Tires
146mm / 5.75" max tire size with a 2.2 max rim size (including spare).
Tire modifications are permitted, as long as the tire is no larger than
5.75" in diameter measured off the vehicle laying on its side, and all tire
parts are from a legal scale tire.
Rear Steer and Dig:
Rear steer and dig are allowed and encouraged in C3
