These rules were decided and voted on by the competition committee and are good for the 2024 Calendar Year.  All rules are subject to changes, additions and/or subtractions based on new technology, parts and/or chassis’ at any time and at Trigger King RC’s sole discretion.

2024 JConcepts Outlaw Retro Clod Buster Monster Truck Rules & Class Information

TK Outlaw Retro Clod

This class is in the spirit of the golden age of “Stage 2″ monster trucking as seen on the TNT or USHRA racing circuits of the late 80’s. This is the period where the lumbering early monsters (i.e. Stage 1) gave way to lighter, more powerful trucks with racing as the main purpose. The basis for the vehicles were modified stock pickups or heavy duty boxed frames. Suspensions had relatively little travel and were quite stiff still and as such, it made for wild, unpredictable events. The idea is to recreate this era with R/C using the Tamiya Clod Buster suspension as the basis.


Classically styled bodies only (generally 1990 and earlier, please contact a TK official for anything that may be questionable from the 90’s). Does not have to be replica but must be period appropriate. Allowed 1 body/name change per season.  However, a designated concrete/black top body can be run to avoid damaging particular ones, in which case this will not count towards the season name change limit.


Any chassis fitting in the spirit of the class (i.e. no tube frames) are legal. May be any material.  sicNme Products, JConcepts, Sutton Motorsports and Crawford Performance Engineering all make legal Outlaw Retro Clod Buster chassis’, among others.  Axis Freestyle RC chassis is NOT legal in this class.  Trucks MUST meet minimum weight requirements of 9 lbs. to be legal.  Season points are tallied with a given chassis.  If chassis is changed during season, points will not transfer.


Suspension must be Tamiya Clod Buster-style, utilizing Clod Buster ladder bars, axle braces and anti-rotation brackets (or equivalent aftermarket of each).  No 4-link setups or 4-link triangulation of any kind. Sway bars, sway brackets or sway braces (of any kind) are illegal.  Any pivot-style or similar suspension setup is illegal.


All vehicles must have a minimum of 2 solid axles. Motor on Axle (MOA/Clod Buster) gearboxes are required.  Shaft driven trucks and other non-Clod Buster-suspension vehicles are NOT allowed.


Chevron tread, fully cleated (no cut tires) Clod Buster sized or bigger. Tamiya Clod Buster, JConcepts Firestorm, Golden Years and Golden 73's, and RC4WD Michelin MEGAXBIB are legal.  Pro-Line Destroyers, Devastators and Demolishers, RC4WD Rumbles and B&H, JConcepts Renegades, Launch, Knob, JCT, Firestorm Racer & Firestorm Runner, Bajas, Losi LMT or any other “modern” style cut tires are all prohibited.  Dual Tractors are legal.  No shave tires are allowed.  Certain exceptions may be made in an attempt to recreate a certain vehicle of the specified era, at the discretion of a TK official and must have prior authorization before an event day.  Any traction compound and/or any cleaning chemicals are not allowed to be used on tires at any time.  Any Losi LMT short-course style wheel/tire is NOT allowed.


Most scale appearing monster truck wheels are legal as long as it does not put truck over max width.  Any Losi LMT short-course style wheel/tire is NOT allowed.


No limit.


15.4″ max width on all trucks (outside of tire to outside of tire).  This is half inch over stock 14.9″.  JConcepts Tribute Wheels must be run with 11mm or 17mm adapter.


All 27T machine wound motors are legal.  NO hand wound motors!  One motor per axle allowed.


Limited to one 7.6V 2S lipo.  “Cycling” of batteries is prohibited!


May be 2 or 4WS (or more than that if 6×6 or above).


No maximum number or length.  May be oil filled or friction.


Gearing is open, with the understanding that vehicles must adhere to our maximum speed as stated below.  Each vehicle will be subject to a speed test at each event and will be asked to adjust settings to make that vehicle fall at or under the maximum speed allowed.  Any vehicle may be subject to a random speed test.


Vehicle cannot exceed 10 mph (miles per hour), as tested by a Trigger King RC Official on each race day, using Trigger King R/C equipment.  Each vehicle will be subject to a multiple-pass speed test.  If a vehicle exceeds 10 mph, the driver will be required to adjust settings to bring the maximum speed of the vehicle down and then retest.  Once the acceptable speed is achieved, that vehicle’s speed is not to be adjusted during the remainder of that race day.  Each vehicle may be subject to random speed tests during the course of a race day.


Vehicle must be weighed in competition trim with battery and meet a 9 lbs. minimum weight, using Trigger King R/C equipment.  Any vehicle may be subject to a random weight test.

All rules are subject to changes, additions and/or subtractions based on new technology, parts and/or chassis’ at any time and at Trigger King RC’s sole discretion.


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