Fit these precision-engineered aluminium rear adjustable spring dampers from GPM to your LOSI HAMMER REY U4 ROCK RACER to lower moving friction and better manage compression forces. The design aims to keep the vehicle balanced under hard cornering and rough tracks. Key dimensions remain the same with a 1.8mm spring wire diameter and a reinforced shock shaft upsized from 3.0mm to 4.0mm to enhance strength and reduce bending risk.
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