We live a short distance from Rickson and have been using their gear for about 10 years. We discovered that the 19.5" tires did not fare well when aired down to operate in the very soft sand on the beach at Assateague Island in Maryland. Nitto Dune Grapplers on 16" wheels are our sand tires, that we swap when close to the beach.
I believe you will not find a more helpful and capable outfit to deal with, They have stood behind every product we have purchased. Dan even goes thru all the tires and checks each for roundness and quality. Many are returned.
It is definitely worth the wait to get top quality, especially for we who are carrying heavy loads long distances. Our "H" rated wheels and tires are a worry free solution that was worked for travel from Alaska to the Florida Keys and many places in between.