TRAXXAS TRX4 Trail Crawler Brass Pendulum Wheel Knuckle Axle Weight with Alloy Lid by GPM TRX4023C  [TRX4023C]

Pendulum wheel weight for low-speed crawling

This 16 pcs pendulum wheel knuckle axle weight set is an RC-scale accessory designed to increase wheel downward force for TRX4 platform crawling. The assembly uses a brass body with an alloy lid and stainless steel rolling beads to concentrate mass low on the wheel, helping the tyre maintain ground contact when negotiating low dips or soft terrain.

The kit includes a 9mm hex adapter that is wider than the stock hex, allowing fitment to wheels that accept the larger hex, and a selection of screws, shims, and washers for mounting to the outer knuckle case on both front and rear. Weight is adjustable via removable stainless steel beads so you can tune how much pendulum mass each wheel carries.

Materials were chosen for corrosion resistance and predictable mass: brass for the main weight, alloy for the lid, and stainless steel beads and fasteners for use on muddy or wet tracks. This is a tuning component for RC crawling behaviour and should be fitted and tested only on model vehicles.

Use this set to fine-tune low-speed traction and balance on TRX4 trail crawlers, adjusting bead count and placement to match terrain and tyre setup.