This JR-TT105-BK set supplies aluminum rear upper suspension arms engineered for the TAMIYA TT01 and TT01E chassis. The pieces are designed as direct replacements for the stock plastic upper arms and match the original mounting points so they integrate with standard hinge locations and common rear suspension layouts.
For setup work the aluminum arms provide a firmer mounting point for the rear suspension geometry, helping preserve alignment consistency during tuning sessions. They are suitable when you want repeatable suspension adjustments, balance checks, and gradual handling improvements without replacing other major components.
Installation notes: these parts are made for the TT01 family and use the same chassis attachment locations; verify fit with your specific TT01 or TT01E variant before final installation, and reuse or source any small fasteners from your existing kit or supplier as needed.
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