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Saskatchewan Tire Regulations

In Saskatchewan, it is possible that you could be operating your vehicle for at least five months of the year in winter driving conditions from November to March but snow tire law gets no traction in Saskatchewan. The government of Saskatchewan will not consider making winter tires ( chains ) mandatory. In some other jurisdictions, the arrival of winter weather means drivers must install snow tires. Tires lose pressure at the rate of 1 lb./inch2 for every 5° C drop in temperature. The minimum allowable tread depth is 1.6mm ( 2/32” inches in fraction ). Tire width in Saskatchewan is 445 mm. The weight limit for single tires with a width of 445 mm (17.5”) or greater increases to 7,700 kg (from 6,000 kg) for single axles and to 15,400 kg for tandem axle groups. An under-inflated tire results in wear on the outer edges of the tread surface. On a wet road surface, an under-inflated tire will not squeeze the water out from under the tire surfaces as well as a correctly inflated tire will. If the tire is under-inflated, it has more chance of riding up on a film of water (hydroplaning). The amount of traction with the road surface would be greatly reduced, in turn reducing steering control. Never mount bias and radial tires on the same axle. Always ensure tire diameters are within 12.5 mm (1/2 in.) of each other on a set of duals.

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