Source: https://www.govregs.com/regulations/title49_chapterV_part571_subpartB_section571.139
Timestamp: 2019-04-19 13:19:34
Document Index: 417599514

Matched Legal Cases: ['§ 571', '§ 571', '§ 571', '§ 571', '§ 571', '§ 571', '§ 571', '§ 571', '§ 571']

49 CFR 571.139 - Standard No. 139; New pneumatic radial tires for light vehicles. § 571.139 - Standard No. 139; New pneumatic radial tires for light vehicles.
§ 571.139 - Standard No. 139; New pneumatic radial tires for light vehicles.
Snow tire means a tire that attains a traction index equal to or greater than 110, compared to the ASTM E1136-93 (Reapproved 2003) (incorporated by reference, see § 571.5) Standard Reference Test Tire when using the snow traction test as described in ASTM F1805-00 (incorporated by reference, see § 571.5), and that is marked with an Alpine Symbol specified in S5.5(i) on at least one sidewall.
S5.5.5 If the maximum inflation pressure of a tire is 420 kPa (60 psi), the tire must have permanently molded into or onto both sidewalls, in letters and numerals not less than 1/2 inch high, the words “Inflate to 60 psi” or “Inflate to 420 kPa (60 psi).” On both sidewalls, the words must be positioned in an area between the tire shoulder and the bead of the tire. However, the words must be also positioned on the tire so that they are not obstructed by the flange of any rim designated for use with that tire in this standard or in Standard No. 110 (§ 571.110 of this part).
S5.5.6 For LT tires, the maximum permissible inflation pressure shown must be the inflation pressure that corresponds to the maximum load of the tire for the tire size as specified in one of the publications described in S4.1.1.(b) of § 571.139. At the manufacturer's option, the shown inflation pressure may be as much as 10 psi (69 kPa) greater than the inflation pressure corresponding to the specified maximum load.
S6.2.1.2.3 Break-in the tire by running it for 2 hours at 80 km/h
S6.2.1.2.7 The test is conducted, continuously and uninterrupted, for ninety minutes through three thirty-minute consecutive test stages at the following speeds: 140, 150, and 160 km/h
S6.3.1.2.3 Conduct the test, without interruptions, at the test speed of not less than 120 km/h with loads and test periods not less than those shown in the following table. For snow tires, conduct the test at not less than 110 km/h
S6.4.1.2.1 The test is conducted for ninety minutes at the end of the test specified in S6.3, continuous and uninterrupted, at a speed of 120 km/h (75 mph). For snow tires, conduct the test at not less than 110 km/h
S6.5.1 Tire strength for passenger car tires. Each tire shall comply with the requirements of S5.3 of § 571.109.
S6.5.2 Tire strength for LT tires. Each tire shall comply with the requirements of S7.3 of § 571.119.
S6.6 Tubeless tire bead unseating resistance. Each tire shall comply with the requirements of S5.2 of § 571.109. For light truck tires, the maximum permissible inflation pressure to be used for the bead unseating test is as follows: