Manitoba Public Insurance analyzed collision claims over a 6-year period (insurance years 2011-12 to 2017-18). The claim frequency was measured by comparing claim frequency before and after a winter tire purchase for 111,872 vehicles. Of those vehicles, there were 13,925 winter-month claims occurring before winter tires were installed and 9,802 winter-month claims occurring after winter tires were installed, stated the report.
Based on analysis of winter month claims (November to March), winter tire use is estimated to reduce collision claim frequency by 6.3 per cent.
The analysis also concluded that in the instance of a collision, damage severity was 5.7 per cent lower for the vehicle equipped with winter tires, compared to the vehicle which did not have winter tires. The lower severity for claims with winter tires was consistent for both single and multiple vehicle collisions.