ARRMA Mini Monster Truck Comparison

Why These Three Trucks Are Closer Than They Look

When choosing a mini RC monster truck from ARRMA's Grom lineup, it is easy to assume the differences are purely aesthetic. While body styles dictate the visual personality of each truck, underlying engineering factors — scale, wheelbase, track width, and ground clearance — massively impact handling, stability, and terrain capability.

Key Quantifiable Differences

1. The Scale Jump: 1/18 vs. 1/16

The comparison splits cleanly between the 1/18 Granite Grom platform and the larger 1/16 scale platform shared by the Gorgon Grom and Quake Grom.

• The Footprint. The 1/16 trucks extend the wheelbase by 9 mm and broaden the width by 15 mm. In micro-RC engineering this radically alters the physics of the truck.
• Traction Rolling. The narrower stance of the 1/18 Granite Grom makes it highly reactive but easier to flip ("traction roll") when cornering hard on asphalt. The wider track of the 1/16 Gorgon and Quake keeps them significantly more planted during aggressive turns.

2. Ground Clearance & Terrain Capability

• Granite Grom (22 mm): Best suited for indoor environments, paved driveways, packed dirt paths, and very short, well-manicured grass.
• Gorgon & Quake Grom (31 mm): A 40% increase in ground clearance. This extra 9 mm allows the 1/16 trucks to clear gravel, small twigs, leaves, and standard backyard lawns that would high-centre or bog down the 1/18 model.

3. Mass, Dampening, and Air Control

Weighing 1.03 kg, the 1/16 trucks carry roughly 28% more mass than the 1/18 Granite Grom.

• The added weight gives the oil-filled coilover shocks more kinetic mass to work against, resulting in cleaner suspension dampening over rough terrain rather than the truck bouncing off obstacles.
• In the air, the heavier 1/16 trucks respond more predictably to mid-air throttle corrections — tapping the brake drops the nose, pinning the throttle pulls off a backflip.

Gorgon Grom vs. Quake Grom: Same Chassis, Different Personality

Because the Gorgon Grom and Quake Grom share the exact same 4WD chassis architecture, motor, and electronics, choosing between them is a near 50/50 split on aesthetics. Two practical points do stand out:

• Body durability in crashes. The Quake Grom features a low-slung, unified modern racing body that wraps tightly over the shock towers, acting like a smooth shell during tumbles — less localised plastic fatigue during high-speed roof slides. The Gorgon Grom has a taller retro monster cab that can catch on turf or rough dirt when upside down.
• Clipless mounting ease. Both use ARRMA's spring-tab clipless design, but the Quake's body contour makes it slightly easier to grab and squeeze with dirty or muddy hands.

Detailed Technical Comparison

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