§575.104. Uniform tire quality grading standards. — Inbound Citations

(c) Is illuminated under the conditions specified in S4.2.

S4.3.2 In the case of a telltale that identifies which tire(s) is (are) under-inflated, each tire in the symbol for that telltale must illuminate when the tire it represents is under-inflated to the extent specified in S4.2.

S4.3.3 (a) Except as provided in paragraph (b) of this section, each low tire pressure warning telltale must illuminate as a check of lamp function either when the ignition locking system is activated to the “On” (“Run”) position when the engine is not running, or when the ignition locking system is in a position between “On” (“Run”) and “Start” that is designated by the manufacturer as a check position.

(e) Under an accelerated remedy program, the remedy that is provided shall be equivalent to the remedy that would have been provided if the manufacturer's remedy program had not been accelerated. The replacement parts used to remedy the defect or noncompliance shall be reasonably equivalent to those that would have been used if the remedy program were not accelerated. The service procedures shall be reasonably equivalent. In the case of tires, all replacement tires shall be the same size and type as the defective or noncompliant tire, shall be suitable for use on the owner's vehicle, shall have the same or higher load index and speed rating, and, for passenger car tires, shall have the same or better rating in each of the three categories enumerated in the Uniform Tire Quality Grading System. See 49 CFR 575.104. In the case of child restraints systems, all replacements shall be of the same type (e.g., rear-facing infant seats with a base, rear-facing infant seats without a base, convertible seats (designed for use in both rear- and forward-facing modes), forward-facing only seats, high back booster seats with a five-point harness, and belt positioning booster seats) and the same overall quality.

(1) ASTM E 501-08 (“ASTM E 501”), “Standard Specification for Standard Rib Tire for Pavement Skid-Resistance Tests” (June 2008), IBR approved for § 575.104 and § 575.106.

(3) For vehicles manufactured prior to September 1, 2000, at the time a motor vehicle is delivered to the first purchaser for purposes other than resale, the manufacturer of that vehicle shall provide the purchaser, in writing and in the English language, the information specified in §§ 575.103 and 575.104 of this part that is applicable to that vehicle and its tires. The document provided with a vehicle may contain more than one table, but the document must either clearly and unconditionally indicate which of the tables apply to the vehicle with which it is provided, or contain a statement on its cover referring the reader to the vehicle certification label for specific information concerning which of the tables apply to that vehicle. If the manufacturer chooses option (a)(2) of this section, the vehicle certification label shall include such specific information.

(c) This section applies to replacement passenger car tires. However, this section does not apply to light truck tires, deep tread, winter-type snow tires, space-saver or temporary use spare tires, tires with nominal rim diameters of 12 inches or less, or to limited production tires as defined in § 575.104(c)(2). Tire manufacturers may comply with the requirements in this § 575.106 as an alternative to complying with the requirements in § 575.104(d)(1)(i)(A) and (B).

(b) The term Vehicle Identification Number (VIN) is used as defined in § 565.3(o) of this chapter. The terms bus, Gross Vehicle Weight Rating (GVWR), motorcycle, multipurpose passenger vehicle, passenger car, trailer, and truck are used as defined in § 571.3(b) of this chapter. The term Booster seat is used as defined in S4 of § 571.213 of this chapter. The term Tire Identification Number (TIN) is the “tire identification number” described in § 574.5 of this chapter. The term Limited production tire is used as defined in § 575.104(c)(2) of this chapter.

(c) This section applies to replacement passenger car tires. However, this section does not apply to light truck tires, deep tread, winter-type snow tires, space-saver or temporary use spare tires, tires with nominal rim diameters of 12 inches or less, or to limited production tires as defined in § 575.104(c)(2). Tire manufacturers may comply with the requirements in this § 575.106 as an alternative to complying with the requirements in § 575.104(d)(1)(i)(A) and (B).

(c) This section applies to replacement passenger car tires. However, this section does not apply to light truck tires, deep tread, winter-type snow tires, space-saver or temporary use spare tires, tires with nominal rim diameters of 12 inches or less, or to limited production tires as defined in § 575.104(c)(2). Tire manufacturers may comply with the requirements in this § 575.106 as an alternative to complying with the requirements in § 575.104(d)(1)(i)(A) and (B).

(1) At the time a motor vehicle is delivered to the first purchaser for purposes other than resale, the manufacturer of that vehicle shall provide the Uniform Tire Quality Grading information required by § 575.104(d)(1)(iii) in the owner's manual of each vehicle it produces. The vehicle manufacturer shall also provide to the purchaser, in writing and in the English language, the information specified in § 575.103 of this part that is applicable to that vehicle. The information provided with a vehicle may contain more than one table, but the document must either:

(i) Clearly and unconditionally indicate which of the tables apply to the vehicle with which it is provided, or

(ii) Contain a statement on its cover referring the reader to the vehicle certification label for specific information concerning which of the tables apply to that vehicle. If the manufacturer chooses option in paragraph (a)(1)(ii) of this section, the vehicle certification label shall include such specific information.

(1) Test conditions are as specified in § 575.104(e)(1).

(2) Test procedure is as specified in § 575.104(e)(2).

(1) Test conditions are as specified in § 575.104(f)(1), subject to the changes in paragraphs (g)(1)(i) through (g)(1)(iii) of this section to additionally measure the peak coefficient of friction.

(i) The sampling rate of the data acquisition is to be no less than 100 Hertz in accordance with Section 6.6.1.8 of ASTM E 1337 (incorporated by reference, see § 575.3).

(ii) The rate of brake application shall be sufficient to control the time interval between initial brake application and peak longitudinal force to be between 0.3 and 0.5 seconds, and shall be determined in accordance with Section 6.3.2 of ASTM E 1337 (incorporated by reference, see § 575.3).

(iii) The peak coefficient of friction (or peak braking coefficient) shall be determined in accordance with Section 12 of ASTM E 1337 (incorporated by reference, see § 575.3) for each dataset.

(iv) The slide coefficient of friction will be determined in accordance with § 575.104(f)(2)(iii).

(iii) Tow the trailer on the asphalt test surface specified in § 575.104(f)(1)(i) at a speed of 40 mph, lock one trailer wheel, and record the slide and peak coefficient of friction on the tire associated with that wheel.

(ii) Mount the tires on the test apparatus described in § 575.104(f)(1)(iv) and load each tire to 1,085 pounds.

(i) Tire traction performance is evaluated on skid pads that are established, and whose severity is monitored, by the NHTSA both for its compliance testing and for that of regulated persons. The test pavements are asphalt and concrete surfaces constructed in accordance with the specifications for pads “C” and “A” in the “Manual for the Construction and Maintenance of Skid Surfaces,” National Technical Information Service No. DOT-HS-800-814. The surfaces have locked wheel traction coefficients when evaluated in accordance with paragraphs (f)(2)(i) through (f)(2)(vii) of this section of 0.50 ±0.10 for the asphalt and 0.35 ±0.10 for the concrete. The location of the skid pads is described in appendix B to this section.

(i) Prepare two standard tires as specified in § 575.104(f)(2)(i).

(i) Tire traction performance is evaluated on skid pads that are established, and whose severity is monitored, by the NHTSA both for its compliance testing and for that of regulated persons. The test pavements are asphalt and concrete surfaces constructed in accordance with the specifications for pads “C” and “A” in the “Manual for the Construction and Maintenance of Skid Surfaces,” National Technical Information Service No. DOT-HS-800-814. The surfaces have locked wheel traction coefficients when evaluated in accordance with paragraphs (f)(2)(i) through (f)(2)(vii) of this section of 0.50 ±0.10 for the asphalt and 0.35 ±0.10 for the concrete. The location of the skid pads is described in appendix B to this section.

(i) Tire traction performance is evaluated on skid pads that are established, and whose severity is monitored, by the NHTSA both for its compliance testing and for that of regulated persons. The test pavements are asphalt and concrete surfaces constructed in accordance with the specifications for pads “C” and “A” in the “Manual for the Construction and Maintenance of Skid Surfaces,” National Technical Information Service No. DOT-HS-800-814. The surfaces have locked wheel traction coefficients when evaluated in accordance with paragraphs (f)(2)(i) through (f)(2)(vii) of this section of 0.50 ±0.10 for the asphalt and 0.35 ±0.10 for the concrete. The location of the skid pads is described in appendix B to this section.

(iv) The slide coefficient of friction will be determined in accordance with § 575.104(f)(2)(iii).

(i) Tire traction performance is evaluated on skid pads that are established, and whose severity is monitored, by the NHTSA both for its compliance testing and for that of regulated persons. The test pavements are asphalt and concrete surfaces constructed in accordance with the specifications for pads “C” and “A” in the “Manual for the Construction and Maintenance of Skid Surfaces,” National Technical Information Service No. DOT-HS-800-814. The surfaces have locked wheel traction coefficients when evaluated in accordance with paragraphs (f)(2)(i) through (f)(2)(vii) of this section of 0.50 ±0.10 for the asphalt and 0.35 ±0.10 for the concrete. The location of the skid pads is described in appendix B to this section.

(i) Tire traction performance is evaluated on skid pads that are established, and whose severity is monitored, by the NHTSA both for its compliance testing and for that of regulated persons. The test pavements are asphalt and concrete surfaces constructed in accordance with the specifications for pads “C” and “A” in the “Manual for the Construction and Maintenance of Skid Surfaces,” National Technical Information Service No. DOT-HS-800-814. The surfaces have locked wheel traction coefficients when evaluated in accordance with paragraphs (f)(2)(i) through (f)(2)(vii) of this section of 0.50 ±0.10 for the asphalt and 0.35 ±0.10 for the concrete. The location of the skid pads is described in appendix B to this section.

(i) Tire traction performance is evaluated on skid pads that are established, and whose severity is monitored, by the NHTSA both for its compliance testing and for that of regulated persons. The test pavements are asphalt and concrete surfaces constructed in accordance with the specifications for pads “C” and “A” in the “Manual for the Construction and Maintenance of Skid Surfaces,” National Technical Information Service No. DOT-HS-800-814. The surfaces have locked wheel traction coefficients when evaluated in accordance with paragraphs (f)(2)(i) through (f)(2)(vii) of this section of 0.50 ±0.10 for the asphalt and 0.35 ±0.10 for the concrete. The location of the skid pads is described in appendix B to this section.

(i) Tire traction performance is evaluated on skid pads that are established, and whose severity is monitored, by the NHTSA both for its compliance testing and for that of regulated persons. The test pavements are asphalt and concrete surfaces constructed in accordance with the specifications for pads “C” and “A” in the “Manual for the Construction and Maintenance of Skid Surfaces,” National Technical Information Service No. DOT-HS-800-814. The surfaces have locked wheel traction coefficients when evaluated in accordance with paragraphs (f)(2)(i) through (f)(2)(vii) of this section of 0.50 ±0.10 for the asphalt and 0.35 ±0.10 for the concrete. The location of the skid pads is described in appendix B to this section.

(iii) Load each vehicle so that the load on each course monitoring and candidate tire is 85 percent of the test load specified in § 575.104(h).

(ix) Prepare two candidate tires of the same SKU in accordance with paragraph (g)(2)(i) of this section, mount them on the test apparatus, and test one of them according to the procedures of paragraphs (g)(2)(ii) through (v) of this section, except load each tire to 85 percent of the test load specified in § 575.104(h). For CT tires, the test inflation of candidate tires shall be 230 kPa. Candidate tire measurements may be taken either before or after the standard tire measurements used to compute the standard tire traction coefficient. Take all standard tire and candidate tire measurements used in computation of a candidate tire's adjusted peak coefficient and adjusted slide coefficient of friction within a single three-hour period. Average the 10 measurements taken on the asphalt surface to find the candidate tire average peak coefficient and average slide coefficient of friction for the asphalt surface. Average the 10 measurements taken on the concrete surface to find the candidate tire average peak coefficient of friction for the concrete surface. Average the 10 measurements taken on the concrete surface to find the candidate tire average slide coefficient of friction for the concrete surface.