Abstract: A rubber mixture, in particular for the tread of a tire, based on at least one polymer that is from the group of diene rubbers and respectively contains 5 to 100 parts by weight finely distributed, precipitated silicic acid, 0 to 80 parts by weight carbon black, if need be 0.2 to 10 parts by weight silane coupling agent, and 0.5 to 20 parts by weight of at least one non-aromatic, viscosity-reducing substance with regard to 100 parts by weight rubber. The viscosity-reducing, non-aromatic substance is based exclusively on the elements carbon, hydrogen, and oxygen and has a region with at least two hydroxyl groups that exist in the form of 1,2-diol or 1,3-diol, and a region of at least two chemically bonded carbon atoms, wherein neither the chemically bonded carbon atoms nor their chemically bonded neighboring carbon atoms are substituted with oxygen.

Abstract: Pneumatic tire. The invention pertains to a vehicle tire for use in winter driving conditions whose tread pattern includes a circumferentially extending row in each of the shoulder regions, wherein the profile or pattern is asymmetrically shaped and includes, relative to the vehicle, an inner tread portion and an outer tread portion, with the shoulder block row of the inner tread portion being provided with sipes having good opening characteristics, with reference to the circumferential direction of the tire, and the shoulder block row of the outer tread portion is provided with sipes that assure high block rigidity during lateral force loading.

Abstract: The plasticizer constituent in the rubber mixture of the tread member of a pneumatic vehicle tire contains at least partially at least one fatty acid triglyceride, preferably natural rape seed oil in which more than 50% of the fatty acid residues are present as oleic acid residues and an oleic acid/linoleic acid ratio is greater than or equal to 2:1. Sunflower seed oil or natural rape seed oil and triglyceride of oleic acid also can be used as the fatty acid triglycerides. There is thus achieved improved traction upon ice and snow as well as at dry and wet roads in the absence of negative effects on other properties of the tire.

Abstract: The radial-ply tire for use on trucks and constructed according to the invention possesses a tread profile which comprises an equatorial line, a tread-profile width and a plurality of rows of blocks separated from one another by circumferential grooves. Each block comprises two substantially parallelogram-shaped blocks parts separated from each other by a fine cross slit substantially centrally extending through the respective block. Two of four block edges of each substantially parallelogram-shaped block part extend substantially parallel to the equatorial line of the tread profile. The other two block edges inclinedly extend relative to the equatorial line at angles which are not 90.degree., whereby all inclinedly extending block edges in a row of blocks form with the equatorial line at least substantially equal angles of inclination.

Abstract: The tire comprises a tread with central grooves between exterior grooves. Both types of grooves extend in a zig-zag shape in the circumferential direction and define ribs between them. Each one of the central grooves is bounded by sidewalls which define two opposite sidewall sections between angled regions of the central grooves. The two sidewall sections alternate from one angled region to the other in the circumferential direction of the tread. A first sidewall section of the two opposite sidewall sections extends at least approximately normally to the tread and a second sidewall section of the two sidewall sections comprises two sidewall portions extending substantially normally to the tread and an interconnecting flank portion therebetween which extends at an inclination in the range of 20.degree. to 60.degree. with respect to a line perpendicular to the tread.