Multi-platform Pendulum Wheel Knuckle Weight GPM023X 20pcs set by GPM  [GPM023X]

Low-mounted brass pendulum weight for crawlers

The GPM023X brass pendulum wheel knuckle axle weight is an aftermarket option that adds concentrated mass low on each wheel to help maintain tyre contact when negotiating steep rock faces and uneven ground. The unit uses a central bearing and Delrin collar and a tapered pendulum profile so the weight naturally hangs to assist grip.

The kit includes adapters, pins, shims, washers and bearings to make it compatible with several crawler platforms. Install these where extra downward force on the wheel will help keep contact on low-angle features and ease recoveries when tyres encounter soft patches.

Included items in the kit (as supplied):

• 31mm Hex Adapter for TRX4 - 2 pcs
• 21mm Hex Adapter for other models - 2 pcs
• Stainless Steel Pin 2x10 - 2 pcs
• 5mm Spring Steel Shims - 2 pcs
• 5mm Metal Washer w.opening - 2 pcs
• 19mm Stainless Steel Hex Socket Screws - 2 pcs
• Metal Washer for GMADE models - 2 pcs
• M4x2.5x11 Pin - 2 pcs
• 12x18x4 Bearings - 2 pcs

Key technical and fit notes taken from the manufacturer:

• The single pendulum weight is specified as 128 gram, not including the bearings and collars.
• Two hex widener sizes are provided: 31mm hex wideners intended for Traxxas TRX-4, and 21mm hex wideners for Axial SCX-10 I/II, GMADE Sawback family and HPI Venture 1165642.
• Wheels must have an inner diameter of 45mm and a wheel shaft hole of 5mm to be compatible with this kit.
• Installation location is on the outer case of the front and rear knuckle arms where this aftermarket part mounts to add mass not present on the original chassis.
• For TRX-4 use, insert the white Delrin collars on the rear side of the pendulum where there is a groove and secure the hex adapter with the supplied screw pin.
• For Axial SCX-10 I/II, GMADE Sawback/Sawback 4LS/Komodo and HPI Venture 1165642, press bearings on both sides of the pendulum and install the hex adapter directly onto the supplied steel pin.

Choose these brass pendulum weights to add low-centre mass where it improves wheel bite and helps crawlers traverse ruts and steep faces; always confirm wheel and shaft dimensions and follow the correct adapter and collar orientation for your chassis.