Unless you're putting the trailer on the roof, the tire capacity won't influence towing ability. The tires have a capacity of 9876 pounds.

The axle ratings are computed with the tire pressure on the data plate. That's 7800 pounds with the stock tires at 35psi. But tire pressure may not be the critical factor to the axle rating.

May we assume the 7500 pounds is a fully loaded, gross trailer weight and not the fantasy "dry weight". Trailers are 400+ pounds heaver than the "dry weight" as they roll out of the factory and get heavier fast!

A 7500 pound trailer will need at least 750 pounds on the ball and a good weight distribution hitch is mandatory. We're using the Equalizer 1000/10,000 pound unit for our lighter, but tongue heavy trailer.

We're using the Tekonsha P3 electronic brake controller. Either the P3 or Prodigy remain the best controllers on the market and will stop you highway or city without messing with the controls.

I have two rules of thumb for towing weights. The 1000 Pound Rule states you need 1000 pounds more towing capacity than the trailer weight to accound for vehicle loads; the One Ton Rule states you won't be happy towing with less than a ton "excess" capacity.

-- Chuck