Why do most materials have magnetic properties too weak to be detected easily?
Electro-magnetism is a rather large topic. The sub-topic your asking about is called ferromagnetism. Iron atoms have an peciluar structure that imparts their magnetic features. To understand it I suggest you start with the chemistry of the element iron and also quantum mechanics and the structure of electron sub shells around an atom.
Dunlops have a good rep for durability. Just keep in mind that the only way to make a motorcycle tire last longer is to use harder rubber. Which means less grip, lousy handling, longer braking distances. And when that car suddenly turns in front of you, tire wear will be the last thing on your mind.
Quite complicated. Try researching magnets and molecular properties
So, think of it this way: In an atom the electrons are negatively charged and the nucleus is positively charged. When atoms bond together you can get molecules with a negative charge on one end and a positive on the other like a tiny tiny magnet. Usually when billions of these molecules clump together to form. anything. they cancel out it would be like if you threw a thousand magnets in a bucket. They would all stick together whatever way they wanted and the overall force would be canceled out. However, if you take those thousands of magnets and all face them the same way. you have a GIANT magnet. So in a magnetic material or in a magnet, all of the molecules are structures in a way that does not cancel the charges out as well.
metzeler ME880 are the longest lasting tires i've ever heard about they don't handle so well though metzeler tourance last almost as long and have much better handling.
