Inner tubes?

I got some 16in poncho wheels with whitewall tires, I posted them upa while ago..or how to clean them, but problem is that they are not tubeless. I figure that I should probably replace the tubes one of these days, so I was wondering where a good place to buy the tubes is? That and relatively cheap

 

Farm and Home stores have em.....

 

Try to find a 16" RADIAL passenger tube with a short stem.
The radial tubes have better splices and a heavier valve stem base. Depending on your size tire, you could use a
KR-16, or HR-16. Any of the auto tire dealers, or truck tire dealers in Chatt.are a possibility. I work for Wingfoot Goodyear, we have a place there, also. Or try Coker Tire, they're local.