Mismatched tire brands

I couldn't find it online so asked in a local Jeep group's page and found out you are basically right. A gent named TopherTJ seems to know the HTA laws for Ontario Canada. He came up with this:

Regulation 625, 4 (1) Tires shall be installed on a vehicle so as to avoid,

(a) a mixture of construction types consisting of radial ply tires on the front and bias ply or belted bias ply tires on the rear;

(b) a mixture consisting of 50 or 60 aspect ratio tires on the front with any aspect ratio of tires other than 50 or 60 aspect ratio, on the rear;

(c) a combination of construction types or sizes of tires on an axle, except where such types or sizes are equivalent by tire industry standards; or

(d) contact between tires in a dual set or a difference in overall diameter between tires in a dual set of more than thirteen millimetres or a difference in circumference of more than forty-one millimetres.

(2) Clause (1) (a) does not apply to tires fitted on a vehicle with dual rear tires.

(3) Clause (1) (c) does not apply to a temporary use spare tire, specified by a vehicle manufacturer as suitable for emergency use, if not more than one temporary use spare tire is installed on a vehicle.

Mike

The build sheet (thanks to another poster for THAT info!) just shows "TBB - Full Size Spare Tire" (I only just now thought to check it .)

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Thanks for the update Mike.

-Brian