SPIKE PIN FOR SNOW TIRE

PURPOSE:To keep off environmental pollution attributable to car dust without entailing by drop in a braking effect for an automobile on a snowy road, by making a front part of a metal type spike pin containing a proper amount of high hardness particles dispersed. CONSTITUTION:At a rear end part of a spike pin 1, there is formed with a flange part 4 in order to keep the spike pin 1 tight inside a tire 2. For the spike pin 1, such material as having hardness rangaging from HB100-400 is used, that is, ferrocobalt, nickel, copper, aluminum, etc., may be enumerated. As high hardness particles to be contained in suchlike base metals, those being harder than these base metals are used, say, a metallic oxide or the like of zirconia aluminum oxide, silicon oxide magnetite, lime ash, etc., may be enumerated. Size in each particle is of 0.001-1.0mm. in average grain size and for your information, a range of 0.01-0.10mm. is desirable if possible.