Here is what you're looking for! Here is the radial tire you need # AM10208 and here is the wheel # AM20234. These to not come mounted, but are Load Range D and the right size. If you wanted a mounted wheel and tire then you can go with this set up. The Loadstar ST185/80D13 Bias Trailer Tire # AM3S334 has a 13" Galvanized Wheel, a 5 on 4-1/2 bolt pattern and is a Load Range D. If you have radial tires on your trailer currently, then you need to stick with the radials. view full answer...
I recommend checking out the Dexstar Steel Mini Mod Trailer Wheel # AM20551. This wheel is powder coated all white with no striping, measures 15" x 6", and has a 5 on 4 1/2" bolt pattern. view full answer...