[Code of Federal Regulations] [Title 49, Volume 5] [Revised as of October 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR571.110] [Page 320-323] TITLE 49--TRANSPORTATION OF TRANSPORTATION PART 571--FEDERAL MOTOR VEHICLE SAFETY STANDARDS--Table of Contents Subpart B--Federal Motor Vehicle Safety Standards Sec. 571.110 Standard No. 110; Tire selection and rims. S1. Purpose and scope. This standard specifies requirements for tire selection to prevent tire overloading. S2. Application. This standard applies to passenger cars and to non- pneumatic spare tire assemblies for use on passenger cars. S3. Definitions. Accessory weight means the combined weight (in excess of those standard items which may be replaced) of automatic transmission, power steering, power brakes, power windows, power seats, radio, and heater, to the extent that these items are available as factory-installed equipment (whether installed or not). Curb weight means the weight of a motor vehicle with standard equipment [[Page 321]] including the maximum capacity of fuel, oil, and coolant, and, if so equipped, air conditioning and additional weight optional engine. Maximum loaded vehicle weight means the sum of-- (a) Curb weight; (b) Accessory weight; (c) Vehicle capacity weight; and (d) Production options weight. Non-pneumatic rim is used as defined in Sec. 571.129. Non-pneumatic spare tire assembly means a non-pneumatic tire assembly intended for temporary use in place of one of the pneumatic tires and rims that are fitted to a passenger car in compliance with the requirements of this standard. Non-pneumatic tire and non-pneumatic tire assembly are used as defined in Sec. 571.129. Normal occupant weight means 68 kilograms times the number of occupants specified in the second column of Table I. Occupant distribution means distribution of occupants in a vehicle as specified in the third column of Table I. Production options weight means the combined weight of those installed regular production options weighing over 2.3 kilograms in excess of those standard items which they replace, not previously considered in curb weight or accessory weight, including heavy duty brakes, ride levelers, roof rack, heavy duty battery, and special trim. Rim is used as defined in Sec. 571.109. Vehicle capacity weight means the rated cargo and luggage load plus 68 kilograms times the vehicle's designated seating capacity. Vehicle maximum load on the tire means that load on an individual tire that is determined by distributing to each axle its share of the maximum loaded vehicle weight and dividing by two. Vehicle normal load on the tire means that load on an individual tire that is determined by distributing to each axle its share of the curb weight, accessory weight, and normal occupant weight (distributed in accordance with Table I) and dividing by 2. Wheel center member is used as defined in Sec. 571.129. S4. Requirements. S4.1 General. Passenger cars shall be equipped with tires that meet the requirements of Sec. 571.109, New Pneumatic Tires--Passenger Cars, except that passenger cars may be equipped with a non-pneumatic spare tire assembly that meets the requirements of Sec. 571.129, New Non- Pneumatic Tires for Passenger Cars and S6 and S8 of this standard. Passenger cars equipped with such an assembly shall meet the requirements of S4.3(e), S5, and S7 of this standard. S4.2 Tire load limits. S4.2.1 The vehicle maximum load on the tire shall not be greater than the applicable maximum load rating as marked on the sidewall of the tire. S4.2.2 The vehicle normal load on the tire shall not be greater than the test load used in the high speed performance test specified in S5.5 of Sec. 571.109 for that tire. S4.3 Placard. A placard, permanently affixed to the glove compartment door or an equally accessible location, shall display the-- (a) Vehicle capacity weight; (b) Designated seating capacity (expressed in terms of total number of occupants and in terms of occupants for each seat location); (c) Vehicle manufacturer's recommended cold tire inflation pressure for maximum loaded vehicle weight and, subject to the limitations of S4.3.1, for any other manufacturer-specified vehicle loading condition; (d) Vehicle manufacturer's recommended tire size designation; and (e) For a vehicle equipped with a non-pneumatic spare tire assembly, the non-penumatic tire identification code with which that assembly is labeled pursuant to the requirements of S4.3(a) of Sec. 571.129, New Non-Pneumatic Tires for Passenger Cars. S4.3.1 No inflation pressure other than the maximum permissible inflation pressure may be specified unless-- (a) It is less than the maximum permissible inflation pressure; (b) The vehicle loading condition for that pressure is specified; and (c) The tire load rating specified in a submission by an individual manfacturer, pursuant to S4.4.1(a) of Motor Vehicle Safety Standard No. 109, or contained in one of the publications [[Page 322]] described in S4.4.1(b) of Motor Vehicle Safety Standard No. 109 for the tire size at that inflation pressure is not less than the vehicle load on the tire for that vehicle loading condition. S4.4 Rims. S4.4.1 Requirements. Each rim shall: (a) Be constructed to the dimensions of a rim that is listed pursuant to the definition of test rim in paragraph S3. of Sec. 571.109 (Standard No. 109) for use with the tire size designation with which the vehicle is equipped. (b) In the event of rapid loss of inflation pressure with the vehicle traveling in a straight line at a speed of 97 kilometers per hour, retain the deflated tire until the vehicle can be stopped with a controlled braking application. Table I--Occupant Loading and Distribution for Vehicle Normal Load for Various Designated Seating Capacities ------------------------------------------------------------------------ Vehicle normal Designated seating capacity, load, Occupant distribution in a number of occupants number of normally loaded vehicle occupants ------------------------------------------------------------------------ 2 through 4 2 2 in front. 5 through 10 3 2 in front, 1 in second seat. ------------------------------------------------------------------------ S5. Load Limits for Non-Pneumatic Spare Tires. The highest vehicle maximum load on the tire for the vehicle shall not be greater than the load rating for the non-pneumatic spare tire. S6 Labeling Requirements for Non-Pneumatic Spare Tires or Tire Assemblies. Each non-pneumatic tire or, in the case of a non-pneumatic tire assembly in which the non-pneumatic tire is an integral part of the assembly, each non-pneumatic tire assembly shall include, in letters or numerals not less than 4 millimeters high, the information specified in paragraphs S6 (a) and (b). The information shall be permanently molded, stamped, or otherwise permanently marked into or onto the non-pneumatic tire or non-pneumatic tire assembly, or shall appear on a label that is permanently attached to the tire or tire assembly. If a label is used, it shall be subsurface printed, made of material that is resistant to fade, heat, moisture and abrasion, and attached in such a manner that it cannot be removed without destroying or defacing the label on the non- pneumatic tire or tire assembly. The information specified in paragraphs S6 (a) and (b) shall appear on both sides of the non-pneumatic tire or tire assembly, except, in the case of a non-pneumatic tire assembly which has a particular side that must always face outward when mounted on a vehicle, in which case the information specified in paragraphs S6 (a) and (b) shall only be required on the outward facing side. The information shall be positioned on the tire or tire assembly such that it is not placed on the tread or the outermost edge of the tire and is not obstructed by any portion of any non-pneumatic rim or wheel center member designated for use with that tire in this standard or in Standard No. 129. (a) FOR TEMPORARY USE ONLY; and (b) MAXIMUM 80 KM/H (50 M.P.H.). S7. Requirements for Passenger Cars Equipped with Non-Pneumatic Spare Tire Assemblies S7.1 Vehicle Placarding Requirements. A placard, permanently affixed to the inside of the vehicle trunk or an equally accessible location adjacent to the non-pneumatic spare tire assembly, shall display the information set forth in S6 in block capitals and numerals not less than 6 millimeters high preceded by the words ``IMPORTANT--USE OF SPARE TIRE'' in letters not less than 9 millimeters high. S7.2 Supplementary Information. The owner's manual of the passenger car shall contain, in writing in the English language and in not less than 10 point type, the following information under the heading ``IMPORTANT--USE OF SPARE TIRE'': (a) A statement indicating the information related to appropriate use for the non-pneumatic spare tire including at a minimum the information set forth in S6 (a) and (b) and either the information set forth in S4.3(e) or a statement that the information set forth in S4.3(e) is located on the vehicle placard and on the non-pneumatic tire; (b) An instruction to drive carefully when the non-pneumatic spare tire is in use, and to install the proper pneumatic tire and rim at the first reasonable opportunity; and (c) A statement that operation of the passenger car is not recommended with [[Page 323]] more than one non-pneumatic spare tire in use at the same time. S8. Non-Pneumatic Rims and Wheel Center Members S8.1 Non-Pneumatic Rim Requirements. Each non-pneumatic rim that is part of a separable non-pneumatic spare tire assembly shall be constructed to the dimensions of a non-pneumatic rim that is listed pursuant to S4.4 of Sec. 571.129 for use with the non-pneumatic tire, designated by its non-pneumatic tire identification code, with which the vehicle is equipped. S8.2 Wheel Center Member Requirements. Each wheel center member that is part of a separable non-pneumatic spare tire assembly shall be constructed to the dimensions of a wheel center member that is listed pursuant to S4.4 of Sec. 571.129 for use with the non-pneumatic tire, designated by its non-pneumatic tire identification code, with which the vehicle is equipped. [36 FR 22902, Dec. 2, 1971, as amended at 37 FR 23727, Nov. 8, 1972; 40 FR 5530, Feb. 6, 1975; 47 FR 36183, Aug. 19, 1982; 49 FR 38612, Oct. 1, 1984; 55 FR 29589, July 20, 1990; 56 FR 19311, Apr. 26, 1991; 60 FR 13643, Mar. 14, 1995]