Welcome to Keystone RC. A club for RC enthusiast in Pennsylvania. This club is for all PA but primarily based in NW PA and mostly into crawling. We host a winter series and these are the score sheets, rules and scale points sheets for those event. The schedule is on facebook and it's hosted at RC Addict in Franklin, PA
* Scale Points Sheet * Score Sheet * 2022 Rules * Liability Release Waiver *
2022 SORRCA Rules for use in the Keystone RC Club Winter Series
Scale Off Road RC Association
2022 Official Scale Rock Crawling Competition Rules
(2022 - No changes from 2021)
This rulebook is intended to standardize scale off road RC competitions that are held at various locations
throughout the world. The intention is for all clubs/events to use these rules as written; however, they may
be modified on a local basis. All changes made to these rules at a SORRCA sanctioned event must be
covered in a preliminary driver meeting and publicly posted before the event. 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.
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 - 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).
Use this table to determine if your vehicle is legal, and use the column on the left as a checklist.
Check
List:
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:
Prohibited
Modifications
Boat sides, dovetailing, or narrowing of the body is not allowed.
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.
Check list: 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).
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.
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 – 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).
Use this table to determine if your vehicle is legal, and use the column on the left as a checklist.
Minimum Height • Tire height can be no more than 0.5" taller than cab height. Height is
measured from the bottom of the skid to
the top of the bodywork/tube not including a light bar.
• *Example*(5.5" tire = 5" tall from bottom of skid to top of cab/tube
work)
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.
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.
Scale Points:
Scale points are to be awarded at 50% of a vehicle’s total value (rounded down if necessary) for an
average 10 gate course.
Minimum/Maximum values are to be determined by the event organizers or local clubs. Scale points will
be applied to a DNF but not to a DNS.
*No items can be counted more than once unless noted otherwise*
Section Item Description Type Points
Body:
Hard Body
Hardbodies can be injection molded or hand made from styrene
or metal.
Full -12
They can also be 3D printed or vacuum formed but must have a
finished thickness of .060 with these processes to receive
hardbody points.
Cab -6
Drop Bed
Must be a minimum of 1.25" deep from top of bed sides to top of
entire floor. Wheel wells must be realistic size.
-3
Custom Built Hard Body (Points are awarded in addition to hard body
points).
Must have 3-dimensional body panels that cover the chassis (not
flat panels that bolt in between visible tube work).
Must resemble a known 1:1 body and must be hand formed and
fabricated from metal or other rigid material
Full -4
Cab -2
Inner Fenders (front OR back-can do both) -Inner fenders must fill area between
the chassis and body.
-1
Bed: (not available to tubers)
Tube bed or Flatbed
Tube beds and flat beds must be up to the point that the rear
tires end, and must be at least 2/3 the width of the cab at its
narrowest in Class 1. If they do not meet this criteria in class 2 it
will count as a dove tail.
Metal -3
Plastic -1
Headache Rack or Roll Bar
Metal -2
Plastic -1
Tubers, Truggies and roll cages:
Truggy (only applicable to Class 2 and 3):
Truggies are allowed but must meet all of the following
requirements:
Metal -4
• The frame must be replaced with tube behind the cab. Plastic -2
• 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.
XXXXXX Tube bed, roll bar, shock mount points not available
in addition to truggy bed points.
Tube Frame (only applicable to class 3):
A tuber consists of a complete body structure where the front,
cab, and rear sections are comprised entirely of structural tube
work.
Metal -8
XXXXXX Tube bed, roll bar, internal cage, and shock mount
points not available in addition to tuber points.
Plastic -4
Rigid flat metal/plastic body panels
Body panels that rely on a Tube frame for their shape. -1
Interior or Exo Cage (Per row of seats or area where seats would be)
• Cage must have down bars and cross bars in front and
behind each row.
Metal -3
• Cage must be a rigid material of at least 1/8” diameter that is
permanently brazed, welded, soldered or mechanically
fastened together, to create a single unit.
Plastic -1
• Cage must be affixed to a rigid floor board, fender well,
slider, bumper or structural part of the chassis.
• A vehicle interior is required to receive cage points.
XXXXXX Interior and Exo Cage points are not available to
tubers.
Tube / Plate Accessories:Must be made from a rigid material - tube must be ⅛”
diameter or more - flat plate may be any thickness with a minimum of ½”: IE, it
can be bent but two measured sides must equal at least ½” - smaller material may
be used, but will not count towards points
Sliders
Must be mounted on both sides and within 1/2" of each wheel
well, or to the back of the cab on trucks.
Metal -3 per pair
Must be mechanically fastened, welded, or brazed to the
chassis OR Hard body.
Plastic -1 per pair
Bumpers
Must be chassis mounted and separate from the body Metal -3
Plastic -1
Stinger / Grill Guard (Points award in addition to bumper points)
-1 (Max)
Fabricated 3D Shock Mounts
Must be made of metal and brazed or welded to the chassis. Metal -1 per pair
Roof Rack (you only receive points for either a roof rack OR a light
bar).
Metal -2
Plastic -1
Light bar
Must be mounted above windshield or on top of the
roof/roll bar. Minimum width, 3.5".
-1
Interior:
Full Interior
A full interior must include all of these 3D pieces: seat, dash,
steering wheel and complete floor. The interior must be deep
enough for a scale figure from the knees up. An additional -2
points for a handmade/custom interior
Absolutely NO cutting and re-gluing of pre-molded lexan/styrene
interiors to gain additional custom points.
1 Seat -3
2 Seat -4
4 Seat -5
SUV Cargo Area
-1
Full Interior Driver/Passenger (1 passenger maximum):
• Figures must be human, scale sized adult figures. A complete
figure must be a minimum of 5 1/2" tall, and all partial figures
shall be of similar scale to a complete figure.
Full
Figure
-4
• Any interior that is vacuum formed to include driver figure(s) will
receive interior cover points only
Knees
up
-3
Torso -2
Head/
Arms
-1
Interior Cover (Interiors that do not meet the above specs for a full
interior)
A Driver will receive an additional -1 and no points for
passengers.
1 Seat -1
2 Seat -2
4 Seat -3
Suspension, Drivetrain and Steering:
Leaf Springs
Must Support vehicles weight without external shock springs. 1 Axle -3
2 Axle -7
Multiple Driven Axles
3 Axles -3
4 (Or more) axles -5
Chassis mounted steering servo
Front -5
XXXXX Rear CMS points are only available in Class 3 Rear -2
Functioning Transfer Case
• Must be chassis mounted, and have it's own gears that split the
power between the front and rear axles.
• T-case points must include these 3 items: a motor, a geared
transmission and a transfer case.
-4
3D Engine
Must be in a reasonable location and appear to be powering the
drivetrain of the vehicle.
-4
Accessories:
Non-Functional (-1 Each - Maximum of -6)
-1 Each
• Items that are non-functional but you would see on a trail truck.
• Examples: Fuel cell, exhaust, jerry can, hubs on all wheels,
steering stabilizer, disc/drum brakes on all wheels, mirrors(2),
wipers(2), antenna, license plate, first aid, extinguisher, trail
tools, Hi-lift jack, etc..
-6 (Max)
Functional (-1 Each - Maximum of -8)
-1 Each (*unless otherwise noted)
• Functional Items found on a trail vehicle
• Tow strap, -D-ring, Pull Pal, sand ladder, hitch, opening doors
and hood, spare tire mount, etc. *Headlights (2) and taillights (2):
-2 *Winch (electric powered): -2 front, -2 rear (max -4)
-8 (Max)
Spare Tire
• Must remain a functional item (mounted to a rim). -3 (Max)
• Must still be within 1/4" width & height of the drive tires