Stud used to improve the adhesion of tires with a slippery surface in winter (in areas of snow and rolled in the ice-covered ground).
Set the spikes are usually the winter (at least all season) tires, preferably intended for studdable, ie with large individual nerassechennye checkers.
Sometimes the checkers on tire designated specially labeled, or they are already at the factory with holes for the installation of studs. It is best to use tires with factory studding. And be sure to change the time on their respective seasons. On dry hard surface spikes prematurely wear out or fall out, razbaltyvayas in their nests. Suffers and the road surface, so in some Central European countries the use of studded car tires on cars is prohibited.
Experiments and tests have shown that the dimension 175/70R13 tires optimally set about 110-120 pins in three rows on each edge of the tread (Fig. 1). Spikes constituting less than five rows, or arranged in less than 3 mm from the edge of the tread, ineffective
Rice. 1. Examples of arrangements of spines on the tread and the number of tracks left by the ice during braking: a - linear motion of b - the movement of drifting.
If the holes in the drafts of the tread for installation of studs are made at the factory, so it is desirable to studded tires immediately, without waiting nabivshiesya sand and mud smash holes and make them unusable. Partial (incomplete) studding tires also out, since in this case, each spike will have a greater "rip" the load, and coupling properties of the tires would be inadequate. Also, do not fully studded wheel probably lost its original balance, and fully studded - no.
Install spikes better in specialized workshops. Better oshipovyvat all four wheels. When disassembling or rearrangement of spiked wheels, even if the tire tread is not directed, to remember and preserve the direction of its rotation, so that spikes do not work loose in their sockets. New studded wheels need to be properly obkatat - at low speeds (up to 60 km / h), making abrupt maneuvers and braking for about 200 km, and then - without exceeding the maximum speed of 130-140 km / h.
Driving on studded car tires have notable features. On the move the car is noticeably noisier, worsening its fuel efficiency. In snow and mud and slush deep in fresh snow performance spikes is small and solid dry or wet asphalt studded tires even play the usual: for reducing the area of ??tire contact patch with the road car braking distance increases by 5-10%. While 70 per cent reduction in braking distance on ice - to the undoubted advantage!
