This is an RC-scale rear suspension mount produced by 3Racing for TAMIYA TA05 and TA05-R chassis, supplied under the designation TA05-11/3/LB. The part is identified as an aluminum rear mount with an "RR/3 Degree" orientation, intended to replace the stock rear suspension mounting point and provide a rigid, metal alternative to the original component.
The mount's role is purely for chassis and suspension set-up: it keeps the rear suspension geometry consistent and is used when drivers want a firmer mounting point or a fixed 3 degree RR orientation as labelled. Installation follows the TA05 series' existing rear mounting locations, so the piece integrates into the rear suspension assembly of the TA05/TA05-R without modifying the main chassis layout.
For practical installation, prepare a standard hex driver set and basic hand tools to remove the stock rear mount and transfer any necessary hardware to the aluminum unit. The part is an RC accessory for tuning and durability; it does not affect full-vehicle systems outside of the RC model context.
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