I don't think he wants them if not I'll let you know, I have a set of the narrow pneumatic wheels but I never tried them in the sand. These are about the same height but twice as wide
I know your offer of the wheels was for another member, but if you have a spare set, I have been looking for some similar to that to make a cart. I had read in my t kayak transporter research that using these larger tires helped during the transit across our soft sand. Did you find that these worked better than the narrow pneumatic wheels?