What Mrbb said....good sound advice!
If Your set on pulling a disc with Your 4-wheeler check around at the different brand and size disc's available for a 4-Wheeler.The King Kutter's are good disc's and the larger Grey colored discs available thru BassPro's Shops,Orschlens,Tractor Supply and Rural King is a few other places to get prices on disc's also.The ones that have good size tires and can be pulled to where You use them then lowered are better made and,easier to haul and if they have a more solid frame You can add weight to them to dig deeper.