This 24 piece set is a scale accessory intended for TRAXXAS TRX4 trail crawlers to introduce rotating weight at each wheel and improve low-speed stability. The kit uses pendulum-style stainless steel rolling beads inside aluminium outer cases, plus widened 6mm hex adapters, so mass shifts downward as the tyre rotates to help maintain ground contact on uneven or soft terrain.
The pendulum design permits slight movement of the internal mass so it stays oriented toward the ground, creating a dynamic downward bias rather than a fixed ballast. That action helps a wheel that is digging in or negotiating hollows by increasing the downward force at the tyre contact patch while turning.
The components fit to the front and rear outer cases of compatible wheel knuckles and are secured with the supplied stainless fasteners and wider hex adapters; this item is supplied as an aftermarket GPM upgrade for TRX4 style knuckles and is not an OEM replacement.
For off-road enthusiasts who want a mechanical way to bias weight toward the tyres, this GPM pendulum kit fits at the knuckle outer cases to help preserve traction and balance at crawl speeds.
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