The GPM MAKS022 rear knuckle arms are CNC machined from 6061 T6 aluminium to provide a stiff, serviceable replacement for ARRMA Kraton rear hubs. Delrin collars are supplied to control bearing clearance and minimise lateral play, improving repeatable alignment. The 3D streamline machining concentrates material where needed to retain strength while limiting mass, and the included stainless hardware maintains standard mounting points.