"Now Available 300MM Dyna Fat Tire Kit"
"New! What's new at Big Boar? The massive 300MM Dyna Fat Tire Kit. Turn your stock Dyna into a monster with one kit. Parts included are 1 giant swing arm, longer gears for the transmission, crankshaft extension for the engine, outboard bearings for the primary, strutless steel fender, 300MM tire, spacers, gaskets, etc... Kit includes all parts except wide wheel of your choice. 3,395.00 "
I have seen others too, but can't remember where they are.