Ever wonder what the designations stamped on your tire sidewall actually mean? We’d like to break it down for you.
Let’s take for instance, “P195/60R15 87S”. This is a full service description of a tire.
In this case, “87S” denotes a tire’s load capacity and speed rating. The higher the number, the greater the load capacity – an 87 load capacity means that tire can support 1,201 pounds. Speed ratings range from L (75 mph) through V (149 mph), and an S speed rating means the tire is good for 112 mph. W, Y, and Z-speed rated tires are available for extreme performance cars and are rated as high as 186 mph.
As for the rest of the information:
--“P” denotes Passenger Tire
--195 is the tire’s width from s ...[more]
Every year, about 290 million tires are discarded; of those, about 233 million are recycled in one way or another. Shredded tires can be used for playground surfaces, welcome mats, hot-melt asphalt, bark mulch and even made into building material for “green” construction.
But what can you do with your old tires? Here are some ideas:
--Fill a tractor tire with sand to make a great sandbox for kids
--Hang a tire from a rope as a tire swing
--Stack a couple of tires on top of each other, bolt them together and paint them a cheerful color, then use them as a planter
--Lay two rows of tires next to each other, somewhat staggered, and use them for broken-field running as part of football conditioning
--Bolt two tires toget ...[more]
Ever think about all the different vehicles that use rubber tires? Tractors, industrial equipment, everything else that rolls on rubber?
Each specialized type of tire requires a specialized design for its specific purpose. Aircraft tires, for instance, have to be very robust and handle a great deal of weight and stress, but for only a short period of time. Aircraft tires are often filled with an inert gas such as nitrogen, for more stable inflation levels, and are designed with specialized fusible plugs which provide a safer failure mode (rather than a sudden, catastrophic tire explosion).
Off-the-road tires, for vehicles such as graders or mining equipment, operate at low speeds but have to be able to withstand severe service conditions while h ...[more]
If you’ve ever been on a wet highway and suddenly felt somewhat disconnected from the road, chances are your vehicle was beginning to hydroplane. You’ve probably heard the term before, but what exactly does it mean?
Your tires’ treads are designed to clear water away from the contact patch, the section of the tire that actually stays in contact with the road at any given time. The grooves that run around the tire’s circumference, the sipes cut into the tread and other tread elements are designed to evacuate the wedge of water that builds up at the leading edge of the contact patch, channeling it safely behind the tire as you move down the road. Some tires can do this more effectively than others, but…no worn tires can evacuate ...[more]
Driving around on underinflated tires is just a bad idea all the way around. Underinflated tires increase a car’s rolling resistance, meaning a drop in fuel efficiency since it takes more energy to move the vehicle down the road.
A single tire that’s down by ten pounds of air means a 3.3 percent drop in fuel economy…multiply that by all four tires, and you can figure on giving up ten percent of your gas mileage. The added friction and rolling resistance also means more heat is generated, and heat is the enemy of the internal structure of a tire. That heat will damage a tire to the point of failure. Studies show that underinflated tires are a full 25 percent more likely to fail, and at least half of one-car accidents involve a tire problem as a factor. And still, it’s ...[more]
In a perfect world, all four tires would wear out at the same time. In the same perfect world, everyone would be able to afford a whole set of tires all at once. Unfortunately, things often just do not work out that way.
Sometimes you may just have to replace tires as you can afford them, one or two at a time, but there are some important things to bear in mind if you have to do that.
If you can only afford to replace one or two tires, it’s essential that you go with tires that are identical (or at least as close as possible) to the car’s remaining tires. That means that internal construction, size, tread pattern and design should be close to the same. Don’t mix winter tires with all-season tires, don’t mix run-flat t ...[more]
That’s right! Make the right choice on which tires to purchase and you could save hundreds on gas. Both Goodyear’s Assurance Fuel Max as well as Michelin’s Energy Saver product have what manufacturers call lower “rolling resistance.” In short, rolling resistance is the amount of force it takes to push a tire down a road. So the lower the rolling resistance, the less fuel you use. According to the U.S. Department of Transportation, rolling resistance accounts for ...[more]
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