Arched ramps can provide additional, needed clearance to avoid bottoming out while loading. Remember, weight capacity should well exceed total overall weight, including rider and all attached accessories! Dual runners have a combined weight capacity of 1,500 lbs. Single runner weight capacity is 750 lbs. Made in USA with 6063-T5 aluminum billet. Robotically welded, lightweight structure of 0.07 in. thick walls with vinyl-coated tips.