Upgraded Tire adaptation: Compatible with Compatible with 4 lug X 4" bolt pattern, 5 lug X 4.5"/4.75“/5” bolt pattern, and 6 lug X 5.5" bolt pattern..Durable and rustproof：Our trailer spare tire mount is made of thick steel. Can resist deformation. Durable black powder coating finish, rust proof, is the best choice for outdoor use, Max load up to 150 lbs.Upgrade double nut design: Prevent the nut from falling off, and don't worry about losing the tire on the road..Easy to install: Bolted design, no cutting or drilling. The hardware included in the galvanized allows you to easily mount spare tires onto the trailer. You can choose screws of different lengths depending on the size of the steel beam of the frame..Compatibility: Fits trailer tongues up to 6.5 inches and 3.3 inches wide. The inclined and raised mounting design is also ideal for boat trailers.