Hot Racing Arrma Granite Grom Aluminum Rear Lower Arm Set. This is a set of optional rear lower arms intended for use on the Arrma Granite Grom 1/18 4WD Monster Truck. CNC machined from high-quality aluminum, these lower arms provide strength and durability compared to standard composite components. The aluminum construction also adds to the vehicle's rigidity, leading to improved handling and stability during those intense off-road adventures. The anodized finish not only adds a sleek and professional look to your vehicle but also adds a layer of corrosion resistance to ensure longevity in the toughest conditions. This set is precision-engineered for a precise fit, allowing easy installation and a direct swap with the standard components.