An Audi Q7 with Audi's quattro® all-wheel drive should have zero problems in the snow, right? Not if your Q7 came with 21" Original Equipment wheels and 295/35R21 summer tires. Unfortunately, none of the major tire manufacturers make an all-season in this size and there's not a good alternative 21" tire.
If you live in an area outside the Snowbelt, you may not need a set of dedicated winter / snow tires. However, the summer tires currently on your vehicle aren't going to be much help once the temperature begins to drop. The solution? Downsize to 275/45ZR20 Continental ExtremeContact DWS tires on 20" Andros Spec P wheels.
The ExtremeContact DWS features Tuned Performance Indicators -- visible letters molded into the second rib from the outboard shoulder to alert drivers of their 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 has sufficient tread depth for dry and wet roads only. After the "W" and "S" have worn away, the remaining "D" indicates the tire has proper tread depth for dry conditions only.
275/45R20 has the same overall diameter as the 295/35R21 and is 1/2" narrower. The 275/45R20 is an Original Equipment size that Audi uses on certain Q7 trim levels and is compatible. Since your Q7 uses the Indirect ABS-based TPMS system, there are no direct TPMS sensors to purchase. We'll include our free mount and balance, therefore your Tire & Wheel Package ($1156* plus shipping) will arrive ready to install.
*Prices subject to change
Recently, the following question was posted on one of the BMW forums I moderate: "It's getting close to spring time, and I am just wondering when everyone puts their summer wheels/tires on? I live in Ohio, so I was thinking of putting mine on during the first week of April. Any thoughts? In Cleveland, you never know when the winter will permanently end.
Yes, it's difficult to believe the calendar says another winter season has ended, but that doesn't mean your winter tires have been removed. I'm often asked when is the best time to swap winter / snow tires out for all-season or summer tires? My advice is to wait until the threat of snow is gone. Many are tempted to take off their winter tires early because of an unseasonably warm weekend. However, it's important to remember why you purchased your snow tires in the first place: safety! Is it really worth taking the chance of getting caught in a late-season snowstorm just to have your "fun" tires on a week or two sooner?

If you own a set of all-season tires, you should make the change when low temperatures are consistently above freezing each night and the longer term forecast is showing the same. Getting caught in an early spring dusting shouldn't be an issue as all-season tires can still provide traction in light snow.
Summer performance tires are at their best when it's warmer, as they provide almost no traction in snow. If your area tends to have such unpredictable late freezes, put off the changeover a little longer than you would with all-seasons.
When the time does come, why not do the job yourself? Read "Do You Have the Three Tools Needed to Remove Your Wheels and Tires?" to see how easy it is to replace your winter tires with your non-winter set.
Han
kook has introduced a new Ultra High Performance All-Season tire with the Ventus S1 noble2. It appears it'll be a superior option to the Ventus V4 ES H105.
The Ventus S1 noble2 has an asymmetric tread design compared to the directional design of the V4 ES H105. This offers you the ability to fully rotate the tires on the vehicle to maximize treadlife. In addition, asymmetric tires tend to stay quieter as they wear. Hankook uses a hybrid tread compound technology silica that offers lower rolling resistance, improved treadlife and enhanced wet traction.
Ventus S1 noble 2 tires are offered with a 50,000-mile treadlife warranty and a road hazard warranty for the first year or 2/32" of treadwear. This is an improvement over the Ventus V4 ES H104's treadlife warranty, which only extends to tires with a 40-series sidewall and up.
Kontrol Technology is a Hankook philosophy, as well as a set of proprietary innovations applied during tire research, development and production to ensure controlled driving experiences. The "K" denotes "kinetic" to show that the interaction of this tire with the road lies at the heart of driving control. This technology provides a range of benefits across four areas that drivers identify as key when choosing quality tires: performance, safety, comfort and environmental impact. And just as with other Hankook tires, this new option is priced as a great value for the performance it offers.
When you purchase a set of four Hankook Ventus S1 noble2 tires before June 30, 2013, you can receive an American Express® Reward Card valued at $60 by mail-in rebate. View details here.
In 1953, Chevrolet introduced America's first true sports car with the revolutionary sleek look of the Corvette. American's have been enamored with this vehicle ever since its humble beginnings when there was no manual transmission made that could handle its unbelievable 150hp. Things have changed since every model came with a two-speed Powerglide automatic transmission to the roaring 430hp V8 used in today's C6 models. Most current C6 Corvette (2005-2013) models are equipped with run-flat tires.
Frequently I hear from C6 Corvette owners: "What are the longest lasting run-flat tires?" Switching to an all-season rubber compound can significantly increase treadlife. For instance, the Max Performance Summer Michelin Pilot Sport PS2 ZP has a UTQG rating of 220, while the Ultra High Performance All-Season Michelin Pilot Sport A/S Plus ZP has a much higher UTQG rating of 500. Many C6 Corvette owners are willing to give up a bit of ultimate grip in order to switch to run-flat tires that can wear upwards of 30% longer. The two most popular Ultra High Performance All-Season run-flat replacement tires are the Michelin Pilot Sport A/S Plus ZP and Bridgestone Potenza RE960AS Pole Position RFT.
The Pilot Sport A/S Plus ZP (Zero Pressure) is the Ultra High Performance All-Season run-flat tire member of Michelin's Pilot family of low profile, high-speed tires. Developed in the Original Equipment sizes for Chevrolet Corvette C-5 and C-6 coupe and convertible sports cars, the Pilot Sport A/S Plus ZP is designed to temporarily support the weight of the car even after a loss of air pressure, as well as combine enhanced all-weather performance, wet grip and treadwear along with year-round traction, including in light snow.
Bridgestone's Potenza RE960AS Pole Position RFT tire is developed for drivers looking for enhanced ride quality and all-season traction for sports cars, sports coupes and performance sedans originally equipped with O.E. run-flat tires. It features Bridgestone 3G RFT Technology designed to offer almost the same riding comfort as conventional tires while providing temporary extended mobility for a distance of 50 miles at up to 50 mph even after a puncture has allowed complete air pressure loss. Potenza RE960AS Pole Position RFT tires provide year-round driving flexibility by offering predictable handling, traction and control on dry and wet roads.
When it's time to replace the tires on your Chevrolet C6 Corvette, be sure to shop by vehicle and view the list of longer wearing all-season run-flat tires.