ANSWER: The VH-SPORT RO is rated for 600 lbs. You will be 51 lbs over the carrier’s capacity. As for the main center tube it is very heavy duty and is built the same way that the VH-90RO tube that has a 700 lbs carrying capacity is built. However by exceeding the carrier capacity the welds on the rail may break from the twisting and of the rail while being overloaded. Please do not exceed the rating of the carrier. The VH-90RO does not allow for tie down tubes. It is designed for ATV’s or lawn mowers. You may be forced into purchasing a trailer instead of a carrier.