The Tamiya 53907 - 5x8mm Aluminum Hex Ball Connector provides a straightforward way to fine tune upper arm position on competition chassis. It is well suited to chassis like the TA05 and TRF415MSX where small geometry changes matter on track.
Produced from aluminium for long life and repeatable settings, this connector shortens the bearing-to-ball span to 4mm from the standard 5mm. That reduction gives more precise adjustment options without sacrificing durability.
The connector is compatible with TA05, TRF415MSX and TB Evolution IV platforms, making it useful for racers refining turn-in or aiming for steadier cornering. Its versatility supports a range of tuning approaches depending on track conditions.
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