Quote:
Originally Posted by scotsman
I thought c was lower than e
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It is. It goes E (10-ply equivalent), C (6-ply eq.), then SL (or P) (4-ply eq.). Some tires come in D, but not many. E & C are "truck tires" (the size will say "LT" on the side wall before the numbers), which have thicker side walls, a tiny bit more tread, and I think, depending on the tire, made of a different, harder compound. C tires are considered a nice compromise for people who off road, and E tires are generally considered overkill on a 4Runner.
SL stands for standard load. Sometimes they're called P tires or passenger tires and may have a "P" in front of the size (I'm not sure if there's a technical difference between P and SL. Some else can fill me in.) These are usually what 4Runners come with off the dealer lot. They are lighter than truck tires and so will give you better gas mileage and a more comfortable ride along with less road noise. The trade-off is they're not as well suited to go off road or tow heavy loads, but you'll find people here who say a passenger AT tire is just fine for light to moderate off roading (if you're going to do some off roading in a P tire, it may be smart to buy the tire warranty for peace of mind). More intense off roading on a P tired will increase the chances of blowing a side wall, especially if you air down (which is generally not recommended that you do with a P tire because of the excessive strain airing down puts on the weaker side wall).
Many AT tires don't come in a P version, but some do, such as Ridge Grapplers.
Sorry if you know all of this, but if not, I hope it helps you or anyone else looking for new tires.
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