With the exception or baggage carts approved for the use or the cart vending concessionaire, all four-wheeled carts shall be equipped with with either inflatable rubber wheels with a minimum size or 2.80-2.50/4, 4.10-3.50/4 or larger, or balloon cushion wheels with a minimum load capacity of four hundred and fifty lbs. and a tread durometer range of 60-70(+ 5) on Shore A scale or equivalent. The wheels shall have a minimum of four inches overall diameter with a minimum of 2-1/4" tread width and 1-1/2" tread thickness. Metal, hard rubber welded disc, or other cushion rubber wheels which do not meet the requirements specified above are prohibited.
Haw. Code R. § 19-30-6