Temperature has a big impact on tires, and specifically, tire pressure. Haul from 90 degrees and sunny to 10 below and nasty and your tires will lose roughly 10 psi. That's why Tim Miller from Goodyear says you should check your inflation pressures more often in the winter. Plus: How to calculate your optimum inflation pressure. Time: 4:20; size: 4 Mb. Theme music is "Under a Sky" by Edie Carey. Exit music is "After the Storm" by Dale Murray.