Tamiya XV-01 Rear Lower Aluminum Arm Upgrade XV01-13405-LB by Jazrider  [XV01-13405-LB]

XV-01 alloy rear lower suspension arm

This aluminum rear lower suspension arm is manufactured as a replacement for the Tamiya XV-01 chassis and is identified as XV01-13405-LB. It offers a metal alternative to the original plastic component where clearance and geometry allow, aimed at drivers wanting improved stiffness and repeatable responses.

Fitment notes: check hinge pin and hub interface dimensions prior to final tightening, and reuse original pins and mounting hardware where they are compatible. Expect small differences in fit versus plastic parts; make measured adjustments during reassembly rather than forcing alignment.

Setup impact: the aluminum arm reduces flex and helps maintain suspension geometry under load, which is useful when comparing roll center settings, anti-squat, and rebound. Combine the arm with matched uprights and appropriate shock tuning to understand handling changes more clearly.