Two half torsion axles (adjustable), 425 lbs capacity. I bought the lightest capacity they had because I didn’t want the suspension to end up being to stiff. I bought them online from Southwest Wheel in Dallas. (Dang, I should have had Earl run by there to pick them up). The two of them cost $225. You might be able to get them locally from a trailer dealer a little cheaper. I think Northern Tool also sells them.

Two 4” by 8” wheels and tires from Southwest Wheel. About $25 each. Also sold by Harbor Freight and other, including Tractor Supply. Just make sure that the wheels are matched to your axles (in my case, four bolt on a 4” mounting circle).

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