Guard against blown lock rings, exploding rims, zippers and ruptured tire explosions. All cages conform to OSHA standard 1910.177 for multi-piece and single rim restraining devices. Always use with a remote inflation device. Cages are rated on 130 psi on multi-piece wheels per OSHA specifications. Tire changing can be dangerous and should be done only by trained personnel using proper tools and equipment as directed by Federal OSHA Standard No. 29 CFR Part 1910.177. Tire may explode during infl Specifications Inside Height= 60"; Width= 27.5"; Base= 34"x57"