Thanks! I understand about not using bike wheels, but taking the wheels to a bike shop to have them evaluated sounds like a good idea. I also like the idea of powdercoating the wheels if they are not warped, because they are a little rusted.
Linda,
I would be VERY careful about powder coating a wire spoke wheel. Most likely the wheel will need to be bead blasted to prepare the metal to accept the powder coating. Depending on the metals used, in the wheel, between spoke and rim, the peening of the bead blast can change the hardness of the spoke. Additionally the baking process to harden the powder coat can further alter the hardness to the point where the wheel is no longer sound either vertically or laterally. Lastly, depending on the amount of rust and its locations one might question the integrity of the wheel.
You may be able to get away with it and it appears that some have however I personally would not try it.
As the wheel is the heart of the cart!, I think I would opt for new wheels instead. Your horses safety is worth it.
Bb