The Tamiya 54042 piston rods come with a hard titanium surface treatment designed to lower friction in TRF501X shock assemblies. The finish helps the rods slide cleaner and stay resistant to abrasive particles.
A titanium-treated rod discourages dust accumulation and reduces surface wear, which in turn keeps seal performance more consistent and decreases the need for frequent servicing.
They are aimed at serious hobbyists and racers who want a straightforward durability upgrade for their TRF501X shocks, improving longevity without changing damper geometry.
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