Tires

'Tis the Season (Tires)

We all know about winter tires.  But did you know there is such a thing as summer tires?

Most people have all-season tires on their vehicles.  They work pretty well in a variety of weather conditions.  But if you want better handling and performance, you might consider switching to summer tires.  Here are a few things you should know about them.

Summer tires are good for high-performance vehicles like sports cars and luxury SUVs, but they don't have to be limited to those. They have a different tread pattern than all-season tires, with generally shallower grooves and more rubber that contacts the road.  The rubber is made of a stickier compound good for taking corners at higher speeds.  Plus it is engineered so it stays firmer the hotter the temperature gets. 

Here's a bonus.  That design also works well in warm, wet weather.  It makes sense, since more the more rubber that's touching the concrete or asphalt when it's slippery out, the better the traction. 

There are some things to be aware of with summer tires.  They often have asymmetrical or unidirectional tread patterns.  That sometimes limits the way these tires can be rotated on a vehicle.  Another thing to remember is it is NOT a good idea to use summer tires in any wintery conditions.  They lose traction as the temperature heads toward the freezing range and below since that rubber that's designed to stay firm at warm temperatures gets hard as a rock when they freeze.

But in warmer weather, summer tires can increase your braking and cornering capabilities.  Plus you'll notice more grip at faster speeds and higher temperatures than all-season tires.  So think about discussing summer tires with your service advisor to see if they'd be a good fit for the type of driving you do.  He or she will offer you some choices that are designed to meet your vehicle's specs.

PDR
1008 N. Cunningham Avenue
Urbana, Illinois 61802
217-367-9481
http://www.pdrauto.com

What's in a Number? (What Tire Numbers Mean)

You've probably never paid much attention to the writing on the sides of your tires, but they contain a wealth of information.  There's a long combination of letters and numbers that can tell you a whole lot about what tires your vehicle was designed to be riding on.  Let's check out this example found on an SUV: P245/70R17 108T.

The first letter, P, means it's intended for passenger vehicles.  If there's no letter, it means it's a metric tire.  If there's an LT at the beginning or end that means a tire designed for light trucks.

Moving on to our example, the 245 shows how wide the tire is in millimeters from sidewall to sidewall.  The number that follows in our example, 70, means the height of the tire is 70% of its width.  The letter after that in our example, R, describes the type of tire (on this vehicle, radial).  Following that is the diameter in inches, in our SUV example, 17 inches. 

How much load the tires' sidewalls are designed to take is what that next number is all about (108 in our example).  The higher the load index, the more weight the sidewalls can take.  And the last letter is the speed rating of the tire, in our example, T.  The further along in the alphabet that letter is, the higher its speed rating.  So now you know what those letters and numbers mean.  But why are they important?

When you are getting ready to replace those tires, those numbers are telling you what the original equipment was when your vehicle was new.  Sticking with the same rated tires is always a good idea.  If you don't know what you're doing, trying different sized tires and wheels can cause real issues when it comes to performance and safety, considering all the computerized systems now found on vehicles.  When in doubt, consult your service advisor when it comes to buying new tires.  He or she knows what those tire numbers and letters mean… and a whole lot more.

PDR
1008 N. Cunningham Avenue
Urbana, Illinois 61802
217-367-9481
http://www.pdrauto.com