One of the most difficult vehicles to outfit with all-season tires is the BMW X5 and X6 with staggered 20" wheels. Unfortunately, with the 275/40R20 front and 315/35R20 rear tire sizes, there aren't any run-flat options up to the task of performing in snowy conditions.
Luckily, for drivers willing to step away from a run-flat tire, Continental offers a fantastic choice. Their ExtremeContact DWS (DWS for Dry, Wet and Snow) has been one of our highest rated Ultra High Performance All-Season tires for quite some time and is available for the X5 and X6. While some tires in the category don't perform well in cold temperatures, the DWS has the highest ratings in the category for light snow and deep snow traction.
The ExtremeContact DWS features Tuned Performance Indicators -- visible letters molded into the second rib from the outboard shoulder to alert drivers of the tire's performance levels. A visible "DWS" indicates the tire has sufficient tread depth for dry conditions as well as wet roads and light snow. After the "S" has worn away, the remaining "DW" indicates the tire is only suitable for dry and most wet road conditions. And after the "W" and "S" have both worn away, the remaining "D" indicates the tire has appropriate tread depth for dry conditions only.
To view all tire options for your BMW, shop by vehicle.