New to the forum. Purchased 2017 North Trail 24bhs this summer. Really like the unit, but questioning the stock tire size (ST205/75-14C). Trailer is approx 5800lbs dry (6500-7000 loaded?) and tires are rated 1760lbs/ea with max speed of 75mph. Do I have enough clearance to upgrade to a 15" or 16" LT tire and would I have to upgrade the brakes? Pulling unit to Colorado next year (2500+ miles round trip) and a little worried about tire dependability. TV is 3500 RAM that likes to go 80mph (or is that me?). Thanks in advance for your thoughts!