GPM GPM023X Brass Pendulum Knuckle Weight for Traxxas TRX-4  [GPM023X]

Brass Pendulum Wheel Knuckle AXLE Weight + 21mm Hex Adapter - 20pc set - GPM GPM023X
Price:
£26.88
Brand:
GPM
Model:
GPM023X
GTIN:
4894538293050
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alt="Brass Pendulum Wheel Knuckle AXLE Weight + 21mm Hex Adapter - 20pc set - GPM GPM023X" title="Brass Pendulum Wheel Knuckle AXLE Weight + 21mm Hex Adapter - 20pc set - GPM GPM023X"
alt="Brass Pendulum Wheel Knuckle AXLE Weight + 21mm Hex Adapter - 20pc set - GPM GPM023X" title="Brass Pendulum Wheel Knuckle AXLE Weight + 21mm Hex Adapter - 20pc set - GPM GPM023X"
alt="Brass Pendulum Wheel Knuckle AXLE Weight + 21mm Hex Adapter - 20pc set - GPM GPM023X" title="Brass Pendulum Wheel Knuckle AXLE Weight + 21mm Hex Adapter - 20pc set - GPM GPM023X"
alt="Brass Pendulum Wheel Knuckle AXLE Weight + 21mm Hex Adapter - 20pc set - GPM GPM023X" title="Brass Pendulum Wheel Knuckle AXLE Weight + 21mm Hex Adapter - 20pc set - GPM GPM023X"
alt="Brass Pendulum Wheel Knuckle AXLE Weight + 21mm Hex Adapter - 20pc set - GPM GPM023X" title="Brass Pendulum Wheel Knuckle AXLE Weight + 21mm Hex Adapter - 20pc set - GPM GPM023X"

Pendulum Knuckle Weight for Improved Crawling

Equip your Traxxas TRX-4 with the GPM Brass Pendulum Wheel Knuckle Weight to add purposeful mass at the wheel. The result is steadier climbs and better tyre adhesion on uneven rock and trail surfaces.

Packing includes

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

Original Name / Part No:

Same as original

Compatible Models

  • Traxxas TRX-4
  • Axial SCX-10 I & II
  • HPI Venture 116564
  • GMADE Sawback / Sawback 4LS / Komodo

Performance summary

The pendulum shape, supported by a bearing and delrin spacer, places mass below the axle line so the wheel remains in contact with terrain under load. That geometry improves crawling angles while retaining free rotation of the weight.

Specifications

  • Weight: 128 grams (excluding bearings and collars)
  • Hex Widener Size: 31mm for Traxxas TRX-4, 21mm for Axial and GMADE models
  • Wheel Compatibility: Inner diameter 45mm, wheel shaft hole 5mm

Recommended for scale and competition crawlers seeking a simple upgrade to improve stability and line holding on technical terrain.

Do I need special tools to fit these weights?

Basic hand tools and a press or driver for bearings are useful. The kit includes adaptors and hardware so most fits are straightforward with a small workshop setup.

Will they change my axle gearing or speed?

They increase unsprung mass at the wheels but do not alter gear ratios. Expect a slight change to low speed response rather than top speed or gearing.

Are the adaptors reversible for different wheel offsets?

The included 31mm and 21mm hex adaptors fit specific wheel inner diameters. You can experiment with spacer shims to adjust offset, but verify clearance and steering range after changes.

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