- Loose surface specification but engineering solutions required to make engines work at peak performance in unrelenting cold.
- Michelin’s skinny tyres bristle with 384 tungsten-tipped steel studs to bite into the frozen roads. Each stud is 20mm long and weighs 4g. However, just 7mm is exposed, with the rest inserted into the rubber to provide a strong anchor.
- Shovels are mandatory in case competitors have to dig their cars out of snow.