I have heard a few report about the ATM Dynapro not being the best for winter but I've also heard that that siping makes a big difference and it sounds like the new at2 Dynapro has improved for winter conditions. But for me at least and this point in my life I don't spend much of any time In snow or ice so I'm not too concerned about winter performance.I've only driven the Dynapros through roughly half a winter. I've found their deep snow performance to be absolute garbage. Wasn't impressed by how they handled ice either. Lucky for them I'm cheap so they'll stay around until I kill them a bit more.