How to add weight to a rear wheel drive car in the winter

Written by william hirsch
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How to add weight to a rear wheel drive car in the winter
Increased winter driving safety may result from extra boot weight. (dirty car image by Alexey Klementiev from

According to "Road and Travel" magazine, adding weight inside the boot of a rear wheel drive vehicle increases traction in snow and ice. The back tires in a rear wheel drive automobile gain extra traction from extra force pressing them down onto the road. This extra force increases the friction between the rear tires and the road. Extra tire friction can prevent spinning on snow. The extra weight does reduce gas mileage by as much as 2 per cent per hundred pounds according to the US Department of Energy.

Skill level:

Things you need

  • Spare tire
  • 4 sand bags, 22.7kg.

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  1. 1

    Place a full-size winter rated spare tire in the car's boot replacing a lighter and less snow-friendly doughnut tire.

  2. 2

    Place four 22.7kg. bags of sand in the car's boot.

  3. 3

    Move two bags of sand as close to the left rear drive wheel as possible. This will make sure the weight is centred on the tire for traction. Repeat for the right rear wheel.

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