slowngreen
Robmob is a Californian.
Staff member
Supporter
Excellence Award
These are the official SORRCA (scale off road rc association) for scaler in a competition.
SORRCA
Scale Off Road RC Association
Official Scale Rock Crawling Competition Rules (2011)
General Construction (IN ALL CLASSES OF COMPETITION)
• TWIN VERTICAL PLATE (TVP) CHASSIS ARE NOT ALLOWED, INCLUDING TVP CHASSIS
WITH FRAME EXTENSIONS. Examples of non‐permitted chassis are: SWX, J2‐TT, GC‐2,
Edge, Eclipse, Hustler, etc.
• All vehicles must have a chassis and body (or unibody). On full‐tube rigs class‐specific
requirements apply; see class descriptions.
• No "Motor On Axle" (MOA) of any kind. 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.
• Multiple axle vehicles are allowed, but must follow all other class rules.
• No batteries or electronics (excluding steering servos) are allowed to be mounted on the
suspension, links or axles.
• BANNED TIRE LIST (the following tires are not allowed): Losi Comp Claws; Imex red
rocks, skulls and bones; Hot Bodies Rovers, Sedonas; Panther Cougars, Leopards;
Jconcepts RocX; Pro‐Line Chisels; RC4WD Rocklins, Crazy crawler, X‐locks; Losi Bashers;
Any buggy tires, truck racing type tire, pin tires.**
If you want to run a tire on this list, you must bring a picture of it mounted on a 1:1 vehicle for it
to be considered.
• Tires sizes are determined by listed manufacturer size or size printed on the sidewall. If
that is not available, then the tire is measured dismounted and laying on its side.
• Wheels may be no larger than 2.2” and both the inner and outer bead must be the same
diameter.
• Each vehicle must have a minimum of 20 “scale” points in order to compete at a
national event.
Class Descriptions
Class 1 ‐*A street legal, daily driver mildly modified for trail use.
1. Tires
1.1 Maximum tire outside diameter of 4.19” as advertised by the manufacturer. Tire diameter
and width must be as designed by the manufacturer and may not be modified.
1.2 Tire lugs may not be removed, siped, grooved or otherwise modified from stock. No other
modifications may be made.
1.3 No competition specific tires allowed (see banned tire list).
1.4 Both front and rear tires must be covered by the body or fender flares with no more than
one quarter inch of the tire tread surface extending beyond the body (as viewed from above)
with measurement taken at the axle center line.**
1.5 Full coverage fender flares, tube fenders, and flat fenders are allowed but must be attached
to the body along the entire wheel well opening.**
1.6 Exo cage tube work does not add to tire coverage.
2.Wheelbase
2.1 No maximum or minimum wheelbase limit. Wheelbase should be within one half inch
(total) of the center line of the factory wheel well openings of body.
3. Chassis
3.1 All Chassis must run the full length of the vehicle, from bumper to bumper.
3.2. Chassis may ONLY be ladder frame, molded tub or uni‐body.
4. Bodies
4.1 No tubers or rear tubed (truggy) bodies allowed.
4.2 Flatbed length must be at least two thirds as long as the wheelbase and must be at least as
wide as the cab at doors all the way to the back.
4.3 No dove‐tailing, pinching, boat‐siding, bed bobbing or other performance modifications
allowed.
4.4 Minor trimming of fender flare or lip is allowed.
4.5 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 adding one to the
flatbed will get the additional scale points.
4.6 All vehicles must have a windshield and it must fill in the entire window frame.
5. Other.
5.1 Vehicles must have the motor, transmission, and electronics covered and hidden when
viewed from the top and sides.
5.2 No dig or rear steer in Class 1.
Class 2 ‐*Performance trail truck, not necessarily street legal.
1. Tires
1.1. Max tire outside diameter 4.75" as indicated by the manufacturer. The tire diameter and
width must be as designed by the manufacturer and may not be modified.
1.2. Tire lugs may be removed, siped, grooved and trimmed.
1.3 No competition specific tires allowed (see banned tire list).
2.Wheelbase
2.1 No maximum or minimum wheelbase limit. Wheelbase should 'fit' truck concept/body.
3. Chassis
3.1. Overall chassis length (including bumpers) must be at least three inches longer than your
wheelbase. Placement of the chassis over the wheelbase (centered, offset front or rear) is left
to the discretion of the driver/builder. Stingers, spare tire carriers, winch plates, or other
bumper mounted accessories are not included in the overall chassis length measurement.
3.2. Chassis may ONLY be ladder frame, back‐halved ladder frame, molded tub or uni‐body. No
full round tube chassis in Class 2.
4. Bodies
4.1. Vehicle body from front to rear of driver/passenger doors must be wider than the distance
between the inside of the front tires.
4.2. The vehicle's body must measure no less than four and one half inches vertically from the
top of the roof or roll cage to the lowest part of the side/door/rocker panel. Boat‐sides may be
included in this measurement, but are limited to one inch vertical height from the line where it
meets the body to the point it meets the chassis/frame.
4.3. All the vehicles, at the minimum, must use: production style hood, 50% of the production
style front fenders, 50% of the production grill, roof (or roll cage if an open top), plus two of the
following:
‐*Windshield and frame
‐*Rear quarter panels
‐*Doors/half doors
‐*Rear Bed/cargo area
4.4. Two of the following three body modifications are allowed:
‐Pinched front (must be no less than two thirds the width of the widest part of your cab)
‐Dove‐tail (must appear scale*‐*a truggy/tube bed that is narrower than the cab counts as dove‐
tail).
‐Boat‐sides (see 4.2 above)
5. Other
5.1. Vehicles without an enclosed cab and/or doors must have the motor, transmission, and
electronics in the interior (drivers and passengers compartment) covered and hidden from view
from the top and sides.
5.2. No dig or rear steer in Class 2.
Class 3 ‐*TTC/KOH/extreme trail truck
1. Tires
1.1 Maximum tire outside diameter of 5.75” as measured.
1.2 Tire diameter and width may be reduced, enlarged or combined with other scale tire treads
as desired. The modified tire diameter measurement will be taken with the tire/wheel laying on
its side, without vehicle weight on it.
1.3 Tire lugs may be removed, siped, grooved or otherwise modified.
1.4 No competition specific tires allowed (see banned tire list). Modified tires must still
resemble a scale tire in design.
2.Wheelbase
2.1 No maximum or minimum wheelbase limit.
3. Chassis
3.1 Overall chassis length (including bumpers) must be at least as long as the wheelbase.
Stingers, spare tire carriers, winch plates, or other bumper mounted accessories are not
included in the overall chassis length measurement.
3.2 Chassis may be a ladder frame, back‐halved ladder frame, molded tub, uni‐body or a tuber.
4. Bodies
4.1. All bodies (including tubers) must measure a minimum of five inches wide from front to
rear of door, two inches above the skid and must measure a minimum of five inches tall as
measured from the skid to the tallest point on the body.**
4.2. Body modifications including, but not limited to, pinched front, dove‐tailing and boat‐siding
are permitted as long as the final dimensions comply with the aforementioned rules.
4.3 Tubers must have at least panels or scale vehicle components (tool boxes, fuel cells, etc..) to
conceal the electronics.
5. Other
5.1 Vehicles without an enclosed cab and/or doors must have the motor, transmission, and
electronics in the interior (drivers and passengers compartment) covered and hidden when
viewed from the top and sides.
5.2 Dig and/or rear steer are permitted. However, only the use of one or the other will be
allowed (per course) with the choice being left to driver’s discretion.
5.2.1 The initial use of dig or rear steer will incur a onetime penalty of +5 per course.
5.2.2 If during that same course you engage the other one, there will be a +10 penalty assessed
and your vehicle will be placed back at the last gate cleared on that course. The same penalty
will be assessed each time you use that item.
Scale points
Duplicate items/features do not receive additional points unless otherwise noted. No item/feature will
be counted twice. Items/features with a number in brackets require that number to receive points.
Chassis/Body :
1.1 Tube bed**
‐*Tube bed: metal*‐3, plastic*‐1**
‐*Bed area 4 point roll bar: metal – 2, plastic*‐1
1.2 Flat bed**
‐*Flat bed: metal/wood*‐3, plastic*‐1
‐*Bed mounted headache rack: metal*‐2, plastic*‐1
1.3 Truggy & back halved truck**
Truggy/back halved truck: metal*‐7, plastic*‐3
‐Must replace the ladder frame from the rear of the skid to the back of the vehicle. Must have a roll bar
hoop. Must have integrated shock mounts. Must be a structural part of the rear of the vehicle. (If your
bed does not meet ALL of the preceding criteria, it does not count as a truggy bed).
1.4 Drop bed
‐inside of a tube bed/truggy bed*‐2
‐inside of a standard pickup bed*‐3
2.1 Interior cage or exo‐cage (may only choose one)
‐*3 row cage: metal*‐10, plastic*‐4**
‐*2 row cage: metal*‐8, plastic*‐3
‐*1 row cage: metal*‐5, plastic*‐2
3.1 Tube accessories
‐*Sliders: (both sides) metal*‐3, plastic*‐1
‐*Tube fenders:*‐1 per pair**
‐*Front cage:*‐3
‐*Rear tube structure: metal*‐2, plastic*‐1
‐*Integrated tube shock mounts:*‐1 (per pair)
4.1 Body**
‐*Hard body: full‐8, half*‐4
‐*Drop bed :*‐3
‐*Custom built body: (metal or hard plastic, no lexan) full*‐4, half*‐2
‐*Inner fender wells:*‐1 per pair
5.1 Bumpers (items must be chassis mounted and separate from the body)
‐*Full width bumpers : metal*‐3 each , plastic*‐1 each**
‐*Narrow bumpers : metal*‐1 each**
‐*Stinger/grill guard:*‐1
‐*Spare tire carrier (must be bumper mounted):*‐1
6.1 Exterior roof rack / light bar (may only choose one)
‐*Large roof rack: metal*‐3, plastic*‐1**
‐*Medium roof rack: metal*‐2, plastic*‐1
‐*Small roof rack: metal:*‐1**
‐*Roof top light bar : metal*‐1
Interior:
‐3D interior:**2 seat*‐3, 4 seat*‐5, SUV cargo area*‐1.
‐2D/half interior:**2 seat*‐1, 4 seat*‐2.
‐*Realistic Scale Human figures: full*‐2, part*‐1 (max 2 figures)
Suspension/Drive train/Steering:
‐Leaf springs (front/rear):*‐3 ea,*‐7 both.
‐Multiple axles: 3 driven axles*‐3, 4 (or more) driven axles*‐5**
‐Chassis mounted steering servo:*‐5 front,*‐3 rear (rear steering in class 3 only)
‐Transfer case:*‐4.
‐3D engine:*‐4.
Realistic exterior items (max*‐5 pts):
‐*Fuel cell, exhaust, jerry can, hubs on all wheels, steering stabilizer, disc/drum brakes on all
wheels, mirrors(2), wipers(2), antenna, license plate, Etc.*‐1 each
Functional items (max*‐6 pts):
‐*Tow strap,*‐D‐ring, Pull Pal, sand ladder, hitch, Etc.*‐1 each
‐Headlights(2) and taillights(2), winch.*‐2 each
‐Full size spare tire.*‐3
Miscellaneous scale items 1 (max*‐2):
‐Fire extinguisher, first aid, trail tools (Hi‐lift jack, etc.), tool box, ETC.*‐1 each
Miscellaneous scale items 2 (max*‐2):
‐Canoe, boat, camping gear, animals (dead or alive), lumber, lunchbox, drinks, laptop, scale r/c truck, etc.*‐1 each
RULES LINK: http://www.noeither.com/ScaleRules/RulesV10.pdf
SORRCA
Scale Off Road RC Association
Official Scale Rock Crawling Competition Rules (2011)
General Construction (IN ALL CLASSES OF COMPETITION)
• TWIN VERTICAL PLATE (TVP) CHASSIS ARE NOT ALLOWED, INCLUDING TVP CHASSIS
WITH FRAME EXTENSIONS. Examples of non‐permitted chassis are: SWX, J2‐TT, GC‐2,
Edge, Eclipse, Hustler, etc.
• All vehicles must have a chassis and body (or unibody). On full‐tube rigs class‐specific
requirements apply; see class descriptions.
• No "Motor On Axle" (MOA) of any kind. 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.
• Multiple axle vehicles are allowed, but must follow all other class rules.
• No batteries or electronics (excluding steering servos) are allowed to be mounted on the
suspension, links or axles.
• BANNED TIRE LIST (the following tires are not allowed): Losi Comp Claws; Imex red
rocks, skulls and bones; Hot Bodies Rovers, Sedonas; Panther Cougars, Leopards;
Jconcepts RocX; Pro‐Line Chisels; RC4WD Rocklins, Crazy crawler, X‐locks; Losi Bashers;
Any buggy tires, truck racing type tire, pin tires.**
If you want to run a tire on this list, you must bring a picture of it mounted on a 1:1 vehicle for it
to be considered.
• Tires sizes are determined by listed manufacturer size or size printed on the sidewall. If
that is not available, then the tire is measured dismounted and laying on its side.
• Wheels may be no larger than 2.2” and both the inner and outer bead must be the same
diameter.
• Each vehicle must have a minimum of 20 “scale” points in order to compete at a
national event.
Class Descriptions
Class 1 ‐*A street legal, daily driver mildly modified for trail use.
1. Tires
1.1 Maximum tire outside diameter of 4.19” as advertised by the manufacturer. Tire diameter
and width must be as designed by the manufacturer and may not be modified.
1.2 Tire lugs may not be removed, siped, grooved or otherwise modified from stock. No other
modifications may be made.
1.3 No competition specific tires allowed (see banned tire list).
1.4 Both front and rear tires must be covered by the body or fender flares with no more than
one quarter inch of the tire tread surface extending beyond the body (as viewed from above)
with measurement taken at the axle center line.**
1.5 Full coverage fender flares, tube fenders, and flat fenders are allowed but must be attached
to the body along the entire wheel well opening.**
1.6 Exo cage tube work does not add to tire coverage.
2.Wheelbase
2.1 No maximum or minimum wheelbase limit. Wheelbase should be within one half inch
(total) of the center line of the factory wheel well openings of body.
3. Chassis
3.1 All Chassis must run the full length of the vehicle, from bumper to bumper.
3.2. Chassis may ONLY be ladder frame, molded tub or uni‐body.
4. Bodies
4.1 No tubers or rear tubed (truggy) bodies allowed.
4.2 Flatbed length must be at least two thirds as long as the wheelbase and must be at least as
wide as the cab at doors all the way to the back.
4.3 No dove‐tailing, pinching, boat‐siding, bed bobbing or other performance modifications
allowed.
4.4 Minor trimming of fender flare or lip is allowed.
4.5 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 adding one to the
flatbed will get the additional scale points.
4.6 All vehicles must have a windshield and it must fill in the entire window frame.
5. Other.
5.1 Vehicles must have the motor, transmission, and electronics covered and hidden when
viewed from the top and sides.
5.2 No dig or rear steer in Class 1.
Class 2 ‐*Performance trail truck, not necessarily street legal.
1. Tires
1.1. Max tire outside diameter 4.75" as indicated by the manufacturer. The tire diameter and
width must be as designed by the manufacturer and may not be modified.
1.2. Tire lugs may be removed, siped, grooved and trimmed.
1.3 No competition specific tires allowed (see banned tire list).
2.Wheelbase
2.1 No maximum or minimum wheelbase limit. Wheelbase should 'fit' truck concept/body.
3. Chassis
3.1. Overall chassis length (including bumpers) must be at least three inches longer than your
wheelbase. Placement of the chassis over the wheelbase (centered, offset front or rear) is left
to the discretion of the driver/builder. Stingers, spare tire carriers, winch plates, or other
bumper mounted accessories are not included in the overall chassis length measurement.
3.2. Chassis may ONLY be ladder frame, back‐halved ladder frame, molded tub or uni‐body. No
full round tube chassis in Class 2.
4. Bodies
4.1. Vehicle body from front to rear of driver/passenger doors must be wider than the distance
between the inside of the front tires.
4.2. The vehicle's body must measure no less than four and one half inches vertically from the
top of the roof or roll cage to the lowest part of the side/door/rocker panel. Boat‐sides may be
included in this measurement, but are limited to one inch vertical height from the line where it
meets the body to the point it meets the chassis/frame.
4.3. All the vehicles, at the minimum, must use: production style hood, 50% of the production
style front fenders, 50% of the production grill, roof (or roll cage if an open top), plus two of the
following:
‐*Windshield and frame
‐*Rear quarter panels
‐*Doors/half doors
‐*Rear Bed/cargo area
4.4. Two of the following three body modifications are allowed:
‐Pinched front (must be no less than two thirds the width of the widest part of your cab)
‐Dove‐tail (must appear scale*‐*a truggy/tube bed that is narrower than the cab counts as dove‐
tail).
‐Boat‐sides (see 4.2 above)
5. Other
5.1. Vehicles without an enclosed cab and/or doors must have the motor, transmission, and
electronics in the interior (drivers and passengers compartment) covered and hidden from view
from the top and sides.
5.2. No dig or rear steer in Class 2.
Class 3 ‐*TTC/KOH/extreme trail truck
1. Tires
1.1 Maximum tire outside diameter of 5.75” as measured.
1.2 Tire diameter and width may be reduced, enlarged or combined with other scale tire treads
as desired. The modified tire diameter measurement will be taken with the tire/wheel laying on
its side, without vehicle weight on it.
1.3 Tire lugs may be removed, siped, grooved or otherwise modified.
1.4 No competition specific tires allowed (see banned tire list). Modified tires must still
resemble a scale tire in design.
2.Wheelbase
2.1 No maximum or minimum wheelbase limit.
3. Chassis
3.1 Overall chassis length (including bumpers) must be at least as long as the wheelbase.
Stingers, spare tire carriers, winch plates, or other bumper mounted accessories are not
included in the overall chassis length measurement.
3.2 Chassis may be a ladder frame, back‐halved ladder frame, molded tub, uni‐body or a tuber.
4. Bodies
4.1. All bodies (including tubers) must measure a minimum of five inches wide from front to
rear of door, two inches above the skid and must measure a minimum of five inches tall as
measured from the skid to the tallest point on the body.**
4.2. Body modifications including, but not limited to, pinched front, dove‐tailing and boat‐siding
are permitted as long as the final dimensions comply with the aforementioned rules.
4.3 Tubers must have at least panels or scale vehicle components (tool boxes, fuel cells, etc..) to
conceal the electronics.
5. Other
5.1 Vehicles without an enclosed cab and/or doors must have the motor, transmission, and
electronics in the interior (drivers and passengers compartment) covered and hidden when
viewed from the top and sides.
5.2 Dig and/or rear steer are permitted. However, only the use of one or the other will be
allowed (per course) with the choice being left to driver’s discretion.
5.2.1 The initial use of dig or rear steer will incur a onetime penalty of +5 per course.
5.2.2 If during that same course you engage the other one, there will be a +10 penalty assessed
and your vehicle will be placed back at the last gate cleared on that course. The same penalty
will be assessed each time you use that item.
Scale points
Duplicate items/features do not receive additional points unless otherwise noted. No item/feature will
be counted twice. Items/features with a number in brackets require that number to receive points.
Chassis/Body :
1.1 Tube bed**
‐*Tube bed: metal*‐3, plastic*‐1**
‐*Bed area 4 point roll bar: metal – 2, plastic*‐1
1.2 Flat bed**
‐*Flat bed: metal/wood*‐3, plastic*‐1
‐*Bed mounted headache rack: metal*‐2, plastic*‐1
1.3 Truggy & back halved truck**
Truggy/back halved truck: metal*‐7, plastic*‐3
‐Must replace the ladder frame from the rear of the skid to the back of the vehicle. Must have a roll bar
hoop. Must have integrated shock mounts. Must be a structural part of the rear of the vehicle. (If your
bed does not meet ALL of the preceding criteria, it does not count as a truggy bed).
1.4 Drop bed
‐inside of a tube bed/truggy bed*‐2
‐inside of a standard pickup bed*‐3
2.1 Interior cage or exo‐cage (may only choose one)
‐*3 row cage: metal*‐10, plastic*‐4**
‐*2 row cage: metal*‐8, plastic*‐3
‐*1 row cage: metal*‐5, plastic*‐2
3.1 Tube accessories
‐*Sliders: (both sides) metal*‐3, plastic*‐1
‐*Tube fenders:*‐1 per pair**
‐*Front cage:*‐3
‐*Rear tube structure: metal*‐2, plastic*‐1
‐*Integrated tube shock mounts:*‐1 (per pair)
4.1 Body**
‐*Hard body: full‐8, half*‐4
‐*Drop bed :*‐3
‐*Custom built body: (metal or hard plastic, no lexan) full*‐4, half*‐2
‐*Inner fender wells:*‐1 per pair
5.1 Bumpers (items must be chassis mounted and separate from the body)
‐*Full width bumpers : metal*‐3 each , plastic*‐1 each**
‐*Narrow bumpers : metal*‐1 each**
‐*Stinger/grill guard:*‐1
‐*Spare tire carrier (must be bumper mounted):*‐1
6.1 Exterior roof rack / light bar (may only choose one)
‐*Large roof rack: metal*‐3, plastic*‐1**
‐*Medium roof rack: metal*‐2, plastic*‐1
‐*Small roof rack: metal:*‐1**
‐*Roof top light bar : metal*‐1
Interior:
‐3D interior:**2 seat*‐3, 4 seat*‐5, SUV cargo area*‐1.
‐2D/half interior:**2 seat*‐1, 4 seat*‐2.
‐*Realistic Scale Human figures: full*‐2, part*‐1 (max 2 figures)
Suspension/Drive train/Steering:
‐Leaf springs (front/rear):*‐3 ea,*‐7 both.
‐Multiple axles: 3 driven axles*‐3, 4 (or more) driven axles*‐5**
‐Chassis mounted steering servo:*‐5 front,*‐3 rear (rear steering in class 3 only)
‐Transfer case:*‐4.
‐3D engine:*‐4.
Realistic exterior items (max*‐5 pts):
‐*Fuel cell, exhaust, jerry can, hubs on all wheels, steering stabilizer, disc/drum brakes on all
wheels, mirrors(2), wipers(2), antenna, license plate, Etc.*‐1 each
Functional items (max*‐6 pts):
‐*Tow strap,*‐D‐ring, Pull Pal, sand ladder, hitch, Etc.*‐1 each
‐Headlights(2) and taillights(2), winch.*‐2 each
‐Full size spare tire.*‐3
Miscellaneous scale items 1 (max*‐2):
‐Fire extinguisher, first aid, trail tools (Hi‐lift jack, etc.), tool box, ETC.*‐1 each
Miscellaneous scale items 2 (max*‐2):
‐Canoe, boat, camping gear, animals (dead or alive), lumber, lunchbox, drinks, laptop, scale r/c truck, etc.*‐1 each
RULES LINK: http://www.noeither.com/ScaleRules/RulesV10.pdf
Last edited by a moderator:
