The New Solid Tire Works Well With Light Loads

I did one load of quarry stone (loaded about 2/3 the height of these wet leaves) and was disappointed that it did not roll very well at all with a heavy load - however with this large, but fairly light, load of wet leaves it handled well.  So I am quandried as to whether to buy another pneumatic tire and tube for those 'seldom' jobs that are a bit tough for the old fellow.