TyreReviews released a series of videos that showcase the importance of winter tires and how they stack up against all-wheel drive vehicle inadequately equipped with summer tires. For this video, they used the BMW M3 (RWD) running on Michelin Pilot Alpin 4 UHP winter tires and a Subaru Forester 2.5XT PPP on Bridgestone Potenza RE070 UHP summer tires. The first car up the hill is the winner of the challenge.