1.) MUST BE COMMERCIALLY AVAILABLE, APPROVED CHASSIS FOR 4.5" RACING.

2.) IF USING EXTENDERS, MUST USE ORIGINAL MFG EXTENDERS ON THE CHASSIS THEY WERE DESIGNED FOR. MAY SOLDER EXTENDERS TO THE CHASSIS AND MAY REMOVE FRONT WINGS FOR TIRE CLEARANCE ONLY.

3.) ALL OTHER GROUP 10 CHASSIS RULES APPLY.

MOTOR GROUP 11

1.) MUST BE COMMERCIALLY AVAILABLE AND APPROVED BY THE USRA.

2.) C-CAN MOTORS ONLY MAY BE USED. SEE USRA BOX STOCK 12 RULES FOR C-CAN SPECS.

3.) MAY SOLDER OR GLUE CAN OILITE IN PLACE. MUST USE CORRECT DIAMETER OILITE IN THE CAN IT WAS DESIGNED FOR.

4.) NO INTERCHANGING OF CANS, ENDBELLS & HARDWARE ALLOWED. MUST USE ORIGINAL PARTS FOR EACH BRAND OR TYPE OF MOTOR.

5.) MAY USE ANY USRA APPROVED FULL SIZE, SINGLE PIECE CERAMIC MAGNETS.

6.) MAY SUPER GLUE MAGNETS IN PLACE. NO EPOXY ALLOWED.

7.) NO SHIMMING, POLISHING OR HONING OF MAGNETS ALLOWED.

8.) MAY USE ANY MOTOR BRUSH.

9.) MAY USE ANY THREE COIL SPRING.

10.) NO SHUNT WIRE OR SPRING INSULATION ALLOWED.

11.) MAY NOT MODIFY CAN OR ENDBELL IN ANY WAY OR MATTER.

12.) RETAIL PRICE NOT TO EXCEED $ 36.58.

ARMATURE GROUP 11

1.) MUST BE COMMERICALLY AVAILABLE AND APPROVED BY THE USRA.

2.) MUST BE MACHINED WOUND WITH A MINIMUM OF 55 TURNS OF 30 U.S. GAUGE WIRE. (.0099-.0101 INCHED EXCLUDING THE INSULATION) PER POLE.

3.) MINIMUM DIAMETER OF .513".

4.) MINIMUM STACK LENGTH OF .440". NO SPLIT STACK/LAMINATION ARMS ALLOWED.

5.) ARM MAY BE DYED.

6.) MAY BE BALANCED.

7.) MAY HAVE COMMUTATOR TIE WRAPPED. TIE MUST BE FACTORY DONE.

8.) MUST BE TAGGED GROUP 11, CHALLENGER, COMPETITOR, CONTENDER OR SPORTSMAN. CH, COM, COMP, CONT AND SP ARE ALSO ALLOWED.

9.) COMMUTATOR MAY BE TRUED.

10.) RETAIL PRICE NOT TO EXCEED $19.05.

BODIES

1.) MUST BE COMMERCIALLY AVAILABLE AND APPROVED BY THE USRA. THE ONLY BODIES ALLOWED IS 1/24 4.5" W.B STOCK CAR BODIES.

2.) SEE SPEC SHEET FOR ALL BODY MEASUREMENTS.

3.) MINIMUM ROOF HEIGHT IS 1 7/8" MEASURED FROM THE TECH BLOCK. ROOF RIBS ARE NOT INCLUDED IN THE MEASUREMENT.

4.) MIN. 1/4" FRONT AND REAR BUMPERS. MAY NOT CUT OUT REAR OF BODY.

5.) ALL WINDOWS MUST BE CLEAR.

6.) BODIES MUST HAVE FULL PAINTED 1/24 STOCK CAR INTERIOR. CHASSIS OR TRACK MUST NOT BE VISIBLE.

7.) NO AIR CONTROL DEVICES ALLOWED. NO ALTERNATIONS OR ADDITIONS TO THE ORIGINAL DIMENSIONS ARE PERMITTED EXCEPT FOR THE FOLLOWING;

A.) REAR SPOILER MAX HEIGHT 3/8" MEASURING THE ACTUAL BLADE/CORD LENGTH. MAY ADD LEXAN TO MEET THIS MEASUREMENT.

B.) REAR SPOILER MAX WIDTH IS 3 1/4". LEXAN MAY BE ADDED TO MEET THIS MEASUREMENT.

C.) NO "GURNEY LIP" OR ADDITIONAL BENDS IN THE SPOILER ALLOWED.

8.) NO CUTTING INTO THE TOP OF THE WHEEL WELLS ALLOWED.

9.) CHASSIS MUST COMPLETELY COVER THE CHASSIS WHEN VIEWED FROM ABOVE.

10.) FRONT WHEEL WELLS MUST BE CUT OUT.

11.) MUST HAVE THREE SCALE SIZED DECAL OR PAINTED NUMBERS PLACED ON THE BODY. ONE ON EACH DOOR AND ONE ON THE ROOF. BODIES SHOULD BE PAINTED TO RESEMBLE REAL STOCK CARS.

12. MAY REINFORCE BODY WITH TAPE AND LEXAN.

13. SEE APPROVED BODY LIST.

GEARS

ANY GEAR RATIO ALLOWED, BUT MUST USE 48 PITCH GEARS ONLY. MAY SOLDER PINION ON MOTOR.

AXLES/WHEELS/TIRES

1.) MINIMUM DIAMETER FRONT AXLE IS 3/32". MUST BE SOLID ONE PIECE AXLE THAT PASSES THROUGH FRONT UPRIGHTS.

2.) MINIMUM REAR AXLE DIAMETER IS 1/8".

3.) ALL AXLES MUST BE SOLID STEEL. NO HOLLOW OR OTHER LIGHTWEIGHT AXLES ALLOWED. DRILL BLANK AXLES ALLOWED.

4.) MAY NOTCH AXLE FOR SET SCREWS.

5.) INDEPENDENT ROTATING FRONTS ALLOWED.

6.) FRONT TIRES MUST BE BLACK RUBBER. MIN. DIAMETER IS .815". MIN WIDTH IS .400".

7.) REAR TIRES MUST BE BLACK RUBBER. MIN. DIAMETER IS .815". MAX WIDTH IS .810".

CLEARANCE

MIN. REAR CLEARANCE AT REAR OF CAR 1/16" INCLUDING GEAR.