TRAXXAS UNLIMITED DESERT RACER PRO-SCALE 4X4 Rear L-shape Piggy Back Spring Dampers UDR139R/LN by GPM  [UDR139R/LN]

6061-T6 Aluminum Rear L-shape Piggy Back Damper

This rear suspension hop-up fits the TRAXXAS UNLIMITED DESERT RACER PRO-SCALE 4X4 and uses an L-shape piggy back configuration with an internal piston spring to let you tune rebound and react better to high-speed terrain impacts.

Key engineering points retained from the original design:

• Spring coil: Main spring wire increased from 1.8mm to 2mm for a firmer spring rate while the original spring remains compatible if a softer feel is preferred.
• Damper shaft: Shaft diameter increased from 3.5mm to 5mm to reduce bending under load and improve durability for RC off-road stresses.
• Body and sealing: Aluminum 6061-T6 shock body with a shock-absorb cap to provide a tighter seal aimed at reducing oil leakage risk.
• Adjustability: Built-in piston spring plus adjustable top spring retainer and the red screw on the bottom of the negative-pressure oil cylinder allow rebound and preload tuning to suit differing track and terrain setups.

Installation and tuning role: these dampers are intended to replace the stock rear units on the listed TRAXXAS chassis, increasing shaft stiffness and coil thickness to alter rebound response. Use the top retainer and lower red screw to tune preload and negative pressure damping; confirm clearance at the rear mounts before track use.

Ideal when you need crisper rear control and less shaft flex on the TRAXXAS UNLIMITED DESERT RACER PRO-SCALE 4X4; inspect seals and oil after fitting and make small rebound adjustments while testing on your typical terrain.