Good quality rigs. Keep an eye on your springs, friends had to replace all 4. They were so bad the axle tubes beat a radiuses dents in the bottom of the frame.
For sure spend the money right now and contact trailertiresandwheels.com and get 17.5" Alcoa wheels and GY H rated tires with a steel wheel and cheap tire for a spare.
I did the above on out MS and sold the 5 tires and wheels on CL for $1,000 and the new tires and wheels sent to me were $3,200 total. They were balanced with steel valve stems and new lug nuts.