These injection molded inserts are designed by polytechnics and manufactured ONLY for USA6x6. They are 70% lighter than PVC and HDPE inserts. They are exactly the right size for the hummer wheel. Also available in 17" any width available. They flex into the tire for EASY installation and come with a lifetime Guarantee against breakage. Guaranteed instock and ready to go at $35 ea for July only.
COOL!! 

T !!!
because my slow brain wouldn't figure out the simple instructions to install the PVCs. but finally clicked and got everything together. i may even order some rock rings from you Daniel. the customer service was excellent IMO. thanks Dan. now to test 'em out...lol