Motor Vehicle Tire Safety Regulations

Marginal note:TSD 139

• 5 (1) Tires, other than tires of a class prescribed by subsection 3(1) or 4(1), that are radial ply tires designed for use on a motor vehicle with a GVWR of 4 536 kg or less that was manufactured on or after January 1, 1975 are prescribed as a class of equipment for the purposes of sections 4 and 5 of the Act and must conform to the requirements of TSD 139 and section 6.

• Marginal note:Maximum permissible inflation pressure

  (2) The maximum permissible inflation pressure referred to in S5.5(c) of TSD 139 must be expressed in kilopascals, and may in addition, at the manufacturer’s option, be expressed in pounds per square inch.

• Marginal note:Maximum load rating

  (3) The maximum load rating referred to in S5.5(d) of TSD 139 must be expressed in kilograms, and may in addition, at the manufacturer’s option, be expressed in pounds.

• Definition of winter tire

  (4) For the purposes of TSD 139, winter tire means a tire that

  • (a) meets one of the following snow traction requirements:

    • (i) when tested using the snow traction test described in ASTM F1805 - 06, Standard Test Method for Single Wheel Driving Traction in a Straight Line on Snow- and Ice-Covered Surfaces, with medium pack snow and a test load equal to 74% of the test inflation rated load described in that test method, attains a traction index equal to or greater than 110 compared to a standard reference test tire that meets the requirements of ASTM E1136 - 10, Standard Specification for P195/75R14 Radial Standard Reference Test Tire; or

    • (ii) when tested using the snow traction test described in ASTM F1805 - 20, Standard Test Method for Single Wheel Driving Traction in a Straight Line on Snow- and Ice-Covered Surfaces, with medium pack snow and a test load equal to 74% of the test inflation rated load described in that test method, attains a traction index equal to or greater than 112 compared to a standard reference test tire that meets the requirements of any version of ASTM F2493, Standard Specification for P225/60R16 97S Radial Standard Reference Test Tire, in effect within the less-than-two-year period referred to in section 9.1 of ASTM F1805 - 20; and

  • (b) is marked on at least one sidewall with the Alpine Symbol specified in S5.5(i) of TSD 139.

• (5) [Repealed, SOR/2014-307, s. 35]