[busterbrown]

A few spares? Don't know why you want a few spare tires unless you had a long Alaska or Mexican excursion planned. A single quality spare tire should suffice for your camping needs. Also, you'll have to be diligent of the weight you attach to the rear bumper. Tires and the mounts can exceed 50 lbs easily. I don't believe the manufacturer has rated those bumpers to carry more than 1 tire.

I own the 3220's cousin, a 2017 Bullet 308BHS, which was outfitted with OEM Trailer King tires in size 205/75/14 LRC. That gave me barely 100 lbs of reserve capacity if I loaded the trailer up to it's GVWR. That being said, I believe the manufacturers are required to provide at least a 10% reserve capacity margin going forward in 2018. In my eyes, that's still not enough.

I moved up a wheel size to 15" and mounted Load range E Carlisle tires sized 225/75/15 to my new 5200# axles. It was a package deal last year as 2 of my mono leaf springs snapped in half. Tire brand is also important as many of us know that quality is NOT equal. Carlisle, Goodyear, and Maxxis have good reputations on these forums.

Also, use metal valve stems when you buy new tires and wheels. Your TPMS sensors will appreciate it.