Nat'l Highway Traffic Safety Admin., DOT § 571.110

Nat’l Highway Traffic Safety Admin., DOT § 571.110

TABLE I-E—FOR TIRES WITH 420 KPA (60 PSI) MAXIMUM PERMISSIBLE INFLATION PRESSURE AND MAXIMUM LOAD RATING BELOW 399 KG (880 LB)—Continued

Cord material Inch-pounds joules (J)

Nylon or Polyester ...... 1,950 inch pounds 220 joules (J).

TABLE II—TEST INFLATION PRESSURES [Maximum permissible inflation pressure to be used for the following test]

Tires other than CT tires CT tires Test type psi kPa kPa 32 36 40 60 240 280 300 340 350 290 300 350 390

Physical dimensions, bead un- seating, tire strength, and tire endurance ...... 24 28 32 52 180 220 180 220 180 230 270 230 270 High speed performance...... 30 34 38 58 220 260 220 260 220 270 310 270 310

[38 FR 30235, Nov. 1, 1973]

EDITORIAL NOTE: For FEDERAL REGISTER citations affecting § 571.109, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and on GPO Access.

EFFECTIVE DATE NOTE: At 68 FR 38147, June Accessory weight means the combined 26, 2003, § 571.109 was amended by revising the weight (in excess of those standard heading and S2, effective June 1, 2007. For items which may be replaced) of auto- the convenience of the user, the revised and matic transmission, power steering, added text is set forth as follows: power brakes, power windows, power § 571.109 Standard No. 109—New Pneumatic seats, radio, and heater, to the extent Bias Ply and Certain Specialty Tires. that these items are available as fac- tory-installed equipment (whether in- * * * * * stalled or not). S2. Application. This standard applies to Curb weight means the weight of a new pneumatic radial tires for use on pas- motor vehicle with standard equipment senger cars manufactured before 1975, new including the maximum capacity of pneumatic bias ply tires, and ST, FI, and 8– fuel, oil, and coolant, and, if so 12 rim diameter and below tires for use on equipped, air conditioning and addi- passenger cars manufactured after 1948. How- tional weight optional engine. ever, it does not apply to any tire that has Maximum loaded vehicle weight means been so altered so as to render impossible its use, or its repair for use, as motor vehicle the sum of— equipment. (a) Curb weight; (b) Accessory weight; * * * * * (c) Vehicle capacity weight; and (d) Production options weight. § 571.110 Standard No. 110; Tire selec- Non-pneumatic rim is used as defined tion and rims for motor vehicles in § 571.129. with a GVWR of 4,536 kilograms Non-pneumatic spare tire assembly (10,000 pounds) or less. means a non-pneumatic tire assembly S1. Purpose and scope. This standard intended for temporary use in place of specifies requirements for tire selec- one of the pneumatic tires and rims tion to prevent tire overloading. that are fitted to a passenger car in S2 Application. This standard applies compliance with the requirements of to motor vehicles with a gross vehicle this standard. weight rating (GVWR) of 10,000 pounds Non-pneumatic tire and non-pneumatic or less, except for motorcycles, and to tire assembly are used as defined in non-pneumatic spare tire assemblies § 571.129. for use on those vehicles. Normal occupant weight means 68 kilo- S3. Definitions. grams times the number of occupants

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specified in the second column of Table applicable maximum load rating as I. marked on the sidewall of the tire. Occupant distribution means distribu- S4.2.2 The vehicle normal load on tion of occupants in a vehicle as speci- the tire shall not be greater than the fied in the third column of Table I. test load used in the high speed per- Production options weight means the formance test specified in S5.5 of combined weight of those installed reg- § 571.109 for that tire. ular production options weighing over S4.3 Placard. Each vehicle, except 2.3 kilograms in excess of those stand- for a trailer or incomplete vehicle, ard items which they replace, not pre- shall show the information specified in viously considered in curb weight or S4.3 (a) through (g), and may show, at accessory weight, including heavy duty the manufacturer’s option, the infor- brakes, ride levelers, roof rack, heavy mation specified in S4.3 (h) and (i), on duty battery, and special trim. a placard permanently affixed to the Rim is used as defined in § 571.109. driver’s side B-pillar. In each vehicle Vehicle capacity weight means the without a driver’s side B-pillar and rated cargo and luggage load plus 68 with two doors on the driver’s side of kilograms times the vehicle’s des- the vehicle opening in opposite direc- ignated seating capacity. tions, the placard shall be affixed on Vehicle maximum load on the tire the forward edge of the rear side door. means that load on an individual tire If the above locations do not permit that is determined by distributing to the affixing of a placard that is legible, each axle its share of the maximum visible and prominent, the placard loaded vehicle weight and dividing by shall be permanently affixed to the two. rear edge of the driver’s side door. If Vehicle normal load on the tire means this location does not permit the that load on an individual tire that is affixing of a placard that is legible, determined by distributing to each axle visible and prominent, the placard its share of the curb weight, accessory shall be affixed to the inward facing weight, and normal occupant weight surface of the vehicle next to the driv- (distributed in accordance with Table er’s seating position. This information I) and dividing by 2. shall be in the English language and Wheel center member is used as defined conform in color and format, not in- in § 571.129. cluding the border surrounding the en- S4. Requirements. tire placard, as shown in the example S4.1 General. (a) Passenger cars shall set forth in Figure 1 in this standard. be equipped with tires that meet the At the manufacturer’s option, the in- requirements of § 571.109, New Pneu- formation specified in S4.3 (c), (d), and, matic Tires, except that passenger cars as appropriate, (h) and (i) may be may be equipped with a non-pneumatic shown, alternatively to being shown on spare tire assembly that complies with the placard, on a tire inflation pressure § 571.129, New Non-Pneumatic Tires for label which must conform in color and Passenger Cars and S6 and S8 of this format, not including the border sur- standard. rounding the entire label, as shown in (b) Passenger cars and non-pneu- the example set forth in Figure 2 in matic spare tires assemblies for use on this standard. The label shall be per- passenger cars shall comply with S4 manently affixed and proximate to the through S8 of this standard. placard required by this paragraph. (c) Motor vehicles with a gross vehi- The information specified in S4.3 (e) cle weight rating (GVWR) or 10,000 shall be shown on both the vehicle pounds or less, except for passenger placard and on the tire inflation pres- cars, and the non-pneumatic spare tire sure label (if such a label is affixed to assemblies for use on those vehicles provide the information specified in shall comply with S4.3, S4.3.1, S4.3.2, S4.3 (c), (d), and, as appropriate, (h) and S4.3.3, S4.3.4, and S7.2(a) of this stand- (i)) may be shown in the format and ard. color scheme set forth in Figures 1 and S4.2 Tire load limits. 2. S4.2.1 The vehicle maximum load on (a) Vehicle capacity weight expressed the tire shall not be greater than the as ‘‘The combined weight of occupants

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and cargo should never exceed XXX or placard and label shall be affixed to kilograms or XXX pounds’’; the completed vehicle by the final- (b) Designated seated capacity (ex- stage manufacturer in accordance with pressed in terms of total number of oc- S4.3 and with the vehicle capacity cupants and number of occupants for weight and seating designations as fi- each front and rear seat location); nally manufactured. (c) Vehicle manufacturer’s rec- S4.3.2 Requirements for altered vehi- ommended cold tire inflation pressure cles. A new placard or placard and label for front, rear and spare tires, subject shall be affixed, so as to obscure the to the limitations of S4.3.4. For full original placard, to an altered vehicle size spare tires, the statement ‘‘see that has previously been certified in above’’ may, at the manufacturer’s op- accordance with § 567.4 or § 567.5, other tion replace manufacturer’s rec- than by the addition, substitution, or ommended cold tire inflation pressure. removal of readily attachable compo- If no spare tire is provided, the word nents such as mirrors or tire and rim ‘‘none’’ must replace the manufactur- assemblies, or minor finishing oper- er’s recommended cold tire inflation pressure. ations such as painting, or who alters (d) Tire size designation, indicated by the vehicle in such a manner that its the headings ‘‘size’’ or ‘‘original tire stated weight ratings are not longer size’’ or ‘‘original size,’’ and ‘‘spare valid, before the first purchase of the tire’’ or ‘‘spare,’’ for the tires installed vehicle in good faith for purposes other at the time of the first purchase for than resale, containing accurate infor- purposes other than resale. For full mation for the altered vehicle, in ac- size spare tires, the statement ‘‘see cordance with S4.3. above’’ may, at the manufacturer’s op- S4.3.3 Additional labeling information tion replace the tire size designation. If for vehicles other than passenger cars. no spare tire is provided, the word Each vehicle shall show the size des- ‘‘none’’ must replace the tire size designation and, if applicable, the type ignation; designation of rims (not necessarily (e) On the vehicle placard, ‘‘Tire and those on the vehicle) appropriate for Loading Information and, on the tire the tire appropriate for use on that ve- inflation pressure label, ‘‘Tire Informa- hicle, including the tire installed as tion’’; original equipment on the vehicle by (f) ‘‘See Owner’s Manual for Addi- the vehicle manufacturer, after each tional Information’’; GAWR listed on the certification label (g) For a vehicle equipped with a non- required by § 567.4 or § 567.5 of this chap- pneumatic spare tire assembly, the tire ter. This information shall be in the identification code with which that as- English language, lettered in block sembly is labeled pursuant to the re- capitals and numerals not less than 2.4 quirements of S4.3(a) of 571.129, New millimeters high and in the following Non-Pneumatic Tires for Passenger format: Cars; (h) At the manufacturer’s option, Truck Example—Suitable Tire-Rim Choice identifying information provided in any alphanumeric and or barcode form, GVWR: 2,441 kilograms (5381 pounds). located vertically, along the right edge GAWR: Front—1,299 kilograms (2,864 × or the left edge of the placard or the pounds) with P265/70R16 tires, 16 8.0 rims at 248 kPa (36 psi) cold single. label, or horizontally, along the bot- GAWR: Rear—1,299 kilograms (2,864 tom edge of the placard or the label; pounds) with P265/70R16 tires, 16 × 8.00 rims, and at 248 kPa (36 psi) cold single. (i) At the manufacturer’s option, the load range identification symbol, load S4.3.4 No inflation pressure other index, and speed rating, located imme- than the maximum permissible infla- diately to the right of the tire size des- tion pressure may be shown on the ignation listed in accordance with placard and, if any, tire inflation pres- S4.3(d) above. sure label unless— S4.3.1 Requirements for vehicles manu- (a) It is less than the maximum per- factured in two or more stages. A placard missible inflation pressure;

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(b) It is appropriate for the load lim- tire until the vehicle can be stopped its as calculated in accordance with with a controlled braking application. S4.2; and (c) The tire load rating specified in a TABLE I—OCCUPANT LOADING AND DISTRIBU- submission by an individual manufac- TION FOR VEHICLE NORMAL LOAD FOR VAR- turer, pursuant to S4.1.1(a) of § 571.139 IOUS DESIGNATED SEATING CAPACITIES or contained in one of the publications Vehicle described in S4.1.1(b) of § 571.139, for the Designated seat- normal tire size at that inflation pressure is load, Occupant distribution in a ing capacity, num- number normally loaded vehicle not less than the vehicle maximum ber of occupants of occu- load and the vehicle normal load on the pants tire for those vehicle loading condi- 2 through 4 2 2 in front. tions. 5 through 10 3 2 in front, 1 in second seat. S4.3.5 Requirements for trailers. Each trailer, except for an incomplete vehi- S5. Load Limits for Non-Pneumatic cle, must show the information speci- Spare Tires. The highest vehicle max- fied in S4.3 (c) through (g), and may imum load on the tire for the vehicle show the information specified in S4.3 shall not be greater than the load rat- (h) and (i), on a placard permanently ing for the non-pneumatic spare tire. affixed proximate to the certification S6 Labeling Requirements for Non- label specified in 49 CFR part 567. Addi- Pneumatic Spare Tires or Tire Assemblies. tionally, each trailer must on its Each non-pneumatic tire or, in the case placard contain a cargo capacity state- of a non-pneumatic tire assembly in ment expressed as ‘‘The weight of which the non-pneumatic tire is an in- cargo should never exceed XXX kilo- tegral part of the assembly, each non- grams or XXX pounds’’ in the same lo- pneumatic tire assembly shall include, cation on the placard specified for the in letters or numerals not less than 4 ‘‘vehicle capacity weight’’ statement millimeters high, the information spec- required by this standard. At the man- ified in paragraphs S6 (a) and (b). The ufacturer’s option, the information information shall be permanently specified in S4.3 (c), (d), (h) and (i) may molded, stamped, or otherwise perma- be shown, alternatively, on a tire infla- nently marked into or onto the non- tion pressure label, and conform in pneumatic tire or non-pneumatic tire color and format, not including the assembly, or shall appear on a label border surrounding the entire label, as that is permanently attached to the specified in the example set forth in tire or tire assembly. If a label is used, Figure 2 in this standard. The label it shall be subsurface printed, made of shall be permanently affixed and proxi- material that is resistant to fade, heat, mate to the placard required by this moisture and abrasion, and attached in paragraph. The information specified such a manner that it cannot be re- in S4.3 (e) shall be shown on both the moved without destroying or defacing vehicle placard and on the tire infla- the label on the non-pneumatic tire or tion pressure label (if such a label is af- tire assembly. The information speci- fixed to provide the information specified in paragraphs S6 (a) and (b) shall fied in S4.3 (c), (d), (h) and (i)) in the appear on both sides of the non-pneu- format and color scheme set forth in matic tire or tire assembly, except, in Figures 1 and 2. the case of a non-pneumatic tire as- S4.4 Rims. sembly which has a particular side that S4.4.1 Requirements. Each rim shall: must always face outward when (a) Be constructed to the dimensions mounted on a vehicle, in which case of a rim that is listed pursuant to the the information specified in paragraphs definition of test rim in paragraph S3. of S6 (a) and (b) shall only be required on § 571.109 (Standard No. 109) for use with the outward facing side. The informa- the tire size designation with which tion shall be positioned on the tire or the vehicle is equipped. tire assembly such that it is not placed (b) In the event of rapid loss of infla- on the tread or the outermost edge of tion pressure with the vehicle traveling the tire and is not obstructed by any in a straight line at a speed of 97 kilo- portion of any non-pneumatic rim or meters per hour, retain the deflated wheel center member designated for

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use with that tire in this standard or in cle placard and on the non-pneumatic Standard No. 129. tire; (a) FOR TEMPORARY USE ONLY; (b) An instruction to drive carefully and when the non-pneumatic spare tire is (b) MAXIMUM 80 KM/H (50 M.P.H.). in use, and to install the proper pneu- S7. Requirements for Passenger Cars matic tire and rim at the first reason- Equipped with Non-Pneumatic Spare Tire able opportunity; and Assemblies (c) A statement that operation of the S7.1 Vehicle Placarding Requirements. passenger car is not recommended with A placard, permanently affixed to the more than one non-pneumatic spare inside of the vehicle trunk or an equal- tire in use at the same time. ly accessible location adjacent to the S8. Non-Pneumatic Rims and Wheel non-pneumatic spare tire assembly, shall display the information set forth Center Members in S6 in block capitals and numerals S8.1 Non-Pneumatic Rim Require- not less than 6 millimeters high pre- ments. Each non-pneumatic rim that is ceded by the words ‘‘IMPORTANT— part of a separable non-pneumatic USE OF SPARE TIRE’’ in letters not spare tire assembly shall be con- less than 9 millimeters high. structed to the dimensions of a non- S7.2 Supplementary Information. The pneumatic rim that is listed pursuant owner’s manual of the passenger car to S4.4 of § 571.129 for use with the non- shall contain, in writing in the English pneumatic tire, designated by its non- language and in not less than 10 point pneumatic tire identification code, type, the following information under with which the vehicle is equipped. the heading ‘‘IMPORTANT—USE OF S8.2 Wheel Center Member Require- SPARE TIRE’’: ments. Each wheel center member that (a) A statement indicating the infor- is part of a separable non-pneumatic mation related to appropriate use for spare tire assembly shall be con- the non-pneumatic spare tire including structed to the dimensions of a wheel at a minimum the information set center member that is listed pursuant forth in S6 (a) and (b) and either the in- to S4.4 of § 571.129 for use with the non- formation set forth in S4.3(g) or a pneumatic tire, designated by its non- statement that the information set pneumatic tire identification code, forth in S4.3(g) is located on the vehi- with which the vehicle is equipped.

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[36 FR 22902, Dec. 2, 1971, as amended at 37 to non-pneumatic spare tire assemblies for FR 23727, Nov. 8, 1972; 40 FR 5530, Feb. 6, 1975; those vehicles. 47 FR 36183, Aug. 19, 1982; 49 FR 38612, Oct. 1, 1984; 55 FR 29589, July 20, 1990; 56 FR 19311, S3. Definitions Apr. 26, 1991; 60 FR 13643, Mar. 14, 1995; 67 FR 69623, Nov. 18, 2002; 68 FR 37982, June 26, 2003; * * * * * 69 FR 31317, June 3, 2004; 70 FR 14424, Mar. 22, 2005] Rim diameter means nominal diameter of the bead seat. EFFECTIVE DATE NOTES: 1. At 68 FR 38147, Rim size designation means rim diameter June 26, 2003, § 571.110 was amended by revis- and width. ing S2, S4.1, S4.2.1, S4.2.2, S4.4.1(a), and table Rim type designation means the industry of 1 following S4.4.1(b), by adding S4.2.1.1, manufacturer’s designation for a rim by S4.2.1.2, S4.2.2.1, S4.2.2.2, S4.2.2.3, and S4.4.2 style or code. and by adding to S3 in alphabetical order, Rim width means nominal distance between definitions for ‘‘Rim diameter,’’ ‘‘Rim size rim flanges. designation,’’ ‘‘Rim type designation,’’ ‘‘Rim width,’’ and ‘‘Weather side,’’, effective June 1, 2007. For the convenience of the user, the * * * * * revised and added text is set forth as follows: Weather side means the surface area of the § 571.110 Standard No. 110; Tire selection rim not covered by the inflated tire. and rims for motor vehicles with a GVWR of 4,536 kilograms (10,000 pounds) or less. * * * * * * * * * * S4.1. General. Vehicles shall be equipped with tires that meet the requirements of S2. Application. This standard applies to § 571.139, New pneumatic tires for light vehi- motor vehicles with a gross vehicle weight cles, except that passenger cars may be rating (GVWR or 4,536 kilograms (10,000 equipped with a non-pneumatic spare tire as- pounds) or less, except for motorcycles, and sembly that meets the requirements of

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§ 571.129, New non-pneumatic tires for pas- GAWR corresponding to the size designation senger cars and S6 and S8 of this standard. of the tires fitted to the axle. Passenger cars equipped with such an assem- S4.2.2.2 When passenger car (P-metric) bly shall meet the requirements of S4.3(e), tires are installed on an MPV, truck, bus, or and S5, and S7 of this standard. trailer, each tire’s load rating is reduced by dividing it by 1.10 before determining, under * * * * * S4.2.2.1, the sum of the maximum load ratings of the tires fitted to an axle. S4.2.1 Tire load limits for passenger cars. S4.2.2.3 (a) For vehicles equipped with P- S4.2.1.1 The vehicle maximum load on the metric tires, the vehicle normal load on the tire shall not be greater than the applicable tire shall be no greater than the value of 94 maximum load rating as marked on the side- percent of the derated load rating at the ve- wall of the tire. hicle manufacturer’s recommended cold in- S4.2.1.2 The vehicle normal load on the flation pressure for that tire. tire shall not be greater than 94 percent of (b) For vehicles equipped with LT tires, the the load rating at the vehicle manufacturer’s vehicle normal load on the tire shall be no recommended cold inflation pressure for that greater than 94 percent of the load rating at tire. the vehicle manufacturer’s recommended S4.2.2 Tire load limits for multipurpose pas- cold inflation pressure for that tire. senger vehicles, trucks, buses, and trailers. S4.2.2.1 Except as provided in S4.2.2.2, the * * * * * sum of the maximum load ratings of the tires fitted to an axle shall not be less than S4.4.1 *** the GAWR of the axle system as specified on (a) Be constructed to the dimensions of a the vehicle’s certification label required by rim that is listed by the manufacturer of the 49 CFR part 567. If the certification label tires as suitable for use with those tires, in shows more than one GAWR for the axle sys- accordance with S4 of § 571.139. tem, the sum shall be not less than the (b) * * *

TABLE I.—OCCUPANT LOADING AND DISTRIBUTION FOR VEHICLE NORMAL LOAD FOR VARIOUS DESIGNATED SEATING CAPACITIES

Designated seating capacity, number of Vehicle normal load, num- occupants ber of occupants Occupant distribution in a normally loaded vehicle

2 through 4 ...... 2 ...... 2 in front. 5 through 10 ...... 3 ...... 2 in front, 1 in second seat. 11 through 15 ...... 5 ...... 2 in front, 1 in second seat, 1 in third seat, 1 in fourth seat. 16 through 22 ...... 7 ...... 2 in front, 2 in second seat, 2 in third seat, 1 in fourth seat.

S4.4.2. Rim markings for vehicles other than (2) ‘‘E’’ indicates The European Tyre and passenger cars. Each rim or, at the option of Rim Technical Organization. the manufacturer in the case of a single- (3) ‘‘J’’ indicates Japan Automobile Tire piece wheel, each wheel disc shall be marked Manufacturers’’ Association, Inc. with the information listed in paragraphs (a) (4) ‘‘L’’ indicates ABPA (Brazil), a.k.a. through (e) of this S4.4.2, in lettering not Associacao Latino Americana De Pneus E less than 3 millimeters in height, impressed Aros. to a depth or, at the option of the manufac- (5) ‘‘F’’ indicates Tire and Rim Engineering turer, embossed to a height of not less than Data Committee of South Africa (Tredco). 0.125 millimeters. The information listed in (6) ‘‘S’’ indicates Scandinavian Tire and paragraphs (a) through (c) of this S4.2.2 shall Rim Organization (STRO). appear on the outward side. In the case of (7) ‘‘A’’ indicates The Tyre and Rim Asso- rims of multi piece construction, the infor- ciation of Australia. mation listed in paragraphs (a) through (e) of (8) ‘‘I’’ indicates Indian Tyre Technical Ad- this S4.2.2 shall appear on the rim base and visory Committee (ITTAC). the information listed in paragraphs (b) and (9) ‘‘R’’ indicates Argentine Institute of (d) of this S4.2.2 shall also appear on each Rationalization of Materials, a.k.a. Instituto other part of the rim. Argentino de Racionalizacio´ n de Materiales, (a) A designation that indicates the source (ARAM). of the rim’s published nominal dimensions, (10) ‘‘N’’ indicates an independent listing as follows: pursuant to S4.1 of § 571.139 or S5.1(a) of (1) ‘‘T’’ indicates The Tire and Rim Asso- § 571.119. ciation.

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(b) The rim size designation, and in case of piece wheel, each wheel disc shall be marked multipiece rims, the rim type designation. with the information listed in S4.4.2 (a) For example: 20×5.50, or 20×5.5. through (e), in lettering not less than 3 milli- (c) The symbol DOT, constituting a certifi- meters in height, impressed to a depth or, at cation by the manufacturer of the rim that the option of the manufacturer, embossed to the rim complies with all applicable Federal a height of not less than 0.125 millimeters. motor vehicle safety standards. The information listed in S4.4.2 (a) through (d) A designation that identifies the manu- (c) shall appear on the outward side. In the facturer of the rim by name, trademark, or case of rims of multi piece construction, the symbol. information listed in S4.4.2 (a) through (e) (e) The month, day and year or the month shall appear on the rim base and the infor- and year of manufacture, expressed either mation listed in S4.4.2 (b) and (d) shall also numerically or by use of a symbol, at the op- appear on each other part of the rim. tion of the manufacturer. For example: ‘‘September 4, 2001’’ may be expressed nu- * * * * * merically as: ‘‘90401’’, ‘‘904, 01’’ or ‘‘01, 904’’; ‘‘September 2001’’ may be expressed as: ‘‘901’’, ‘‘9, 01’’ or ‘‘01, 9’’. § 571.111 Standard No. 111; Rearview (1) Any manufacturer that elects to ex- mirrors. press the date of manufacture by means of a S1. Scope. This standard specifies re- symbol shall notify NHTSA in writing of the quirements for the performance and lo- full names and addresses of all manufactur- cation of rearview mirrors. ers and brand name owners utilizing that S2. Purpose. The purpose of this symbol and the name and address of the trademark owner of that symbol, if any. The standard is to reduce the number of notification shall describe in narrative form deaths and injuries that occur when and in detail how the month, day, and year the driver of a motor vehicle does not or the month and year are depicted by the have a clear and reasonably unob- symbol. Such description shall include an ac- structed view to the rear. tual size graphic depiction of the symbol, S3. Application. This standard applies showing and/or explaining the interrelation- to passenger cars, multipurpose pas- ship of the component parts of the symbol as senger vehicles, trucks, buses, they will appear on the rim or single piece wheel disc, including dimensional specifica- schoolbuses and motorcycles. tions, and where the symbol will be located S4. Definitions. on the rim or single piece wheel disc. The no- Convex mirror means a mirror having tification shall be received by NHTSA not a curved reflective surface whose shape less than 60 calendar days before the first use is the same as that of the exterior sur- of the symbol. The notification shall be face of a section of a sphere. mailed to the Office of Vehicle Safety Com- Effective mirror surface means the por- pliance (NVS–222), National Highway Traffic Safety Administration, 400 Seventh Street tions of a mirror that reflect images, SW., Washington, DC 20590. All information excluding the mirror rim or mounting provided to NHTSA under this paragraph brackets. will be placed in the public docket. Unit magnification mirror means a (2) Each manufacturer of wheels shall pro- plane or flat mirror with a reflective vide an explanation of its date of manufac- surface through which the angular ture symbol to any person upon request. height and width of the image of an object is equal to the angular height and * * * * * width of the object when viewed di- 2. At 70 FR 14424, Mar. 22, 2005, § 571.110 was rectly at the same distance except for amended by revising S4.4.2 introductory flaws that do not exceed normal manu- text, effective June 1, 2007. For the conven- facturing tolerances. For the purposes ience of the user, the revised text is set forth of this regulation a prismatic day- as follows: night adjustment rearview mirror one of whose positions provides unit mag- § 571.110 Standard No. 110; Tire selection and rims for motor vehicles with a GVWR nification is considered a unit mag- of 4,536 kilograms (10,000) pounds) or nification mirror. less. S5. Requirements for passenger cars. S5.1 Inside rearview mirror. Each pas- * * * * * senger car shall have an inside rear- S4.4.2. Rim markings for vehicles other than view mirror of unit magnification. passenger cars. Each rim or, at the option of S5.1.1 Field of view. Except as pro- the manufacturer in the case of a single- vided in S5.3, the mirror shall provide a

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