Things to think on, they will give you 10% on an Overweight call. Your tow vehicle tongue weight can carry up to 10% of your boat weight. Trailer failures usually occur in this order, Tires, then brakes(usually stuck on) then bearings(usually caused by a failed rear seal or brakes over-heating). Seldom a failed frame or spring which can be detected visually. Try to stay away from a triple-a trailer rated at 8500 is an amazingly beefy trailer and can really carry much more!! That is what the manufacturer has guaranteed to the Gov that this can carry to get the placard. I'd pay more attention to the towing vehicle in regards towing capacity