Sec. 27.733 - Tires.
(a) Each landing gear wheel must have a tire --
(1) That is a proper fit on the rim of the wheel; and
(2) Of the proper rating.
(b) The maximum static load rating of each tire must equal or exceed
the static ground reaction obtained at its wheel, assuming --
(1) The design maximum weight; and
(2) The most unfavorable center of gravity.
(c) Each tire installed on a retractable landing gear system must, at
the maximum size of the tire type expected in service, have a clearance to
surrounding structure and systems that is adequate to prevent contact
between the tire and any part of the structure or systems.