Text in force at CS27-10: from CS27-0, effective 14 Nov 2003.
(a) Each landing gear wheel must have a tyre:
(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 tyre must equal or exceed the static ground reaction obtained at its wheel, assuming:
(1) The design maximum weight; and
(2) The most unfavourable centre of gravity.
(c) Each tyre installed on a retractable landing gear system must, at the maximum size of the tyre type expected in service, have a clearance to surrounding structure and systems that is adequate to prevent contact between the tyre and any part of the structure or systems.
ED Decision 2003/015/RM · Source