The invention relates to a sulfur-crosslinkable rubber mixture, to a vulcanizate thereof and to a vehicle tire. The sulfur-crosslinkable rubber mixture contains at least the following constituents: at least one diene rubber; and 10 to 300 phr of at least one silica; and 1 to 30 phf of at least one silane A having general empirical formula A-I) (R1)oSi—R2—(S—R3)q—S—X; and  A-I) 0.5 to 30 phf of at least one silane B having general empirical formula B-I) (R1)oSi—R2—(S—R3)u—S—R2—Si(R1)o  B-I) wherein q is 1, 2 or 3; and u is 1, 2 or 3; and X is a hydrogen atom or a —C(═O)—R8 group wherein R8 is selected from hydrogen C1-C20-alkyl groups, preferably C1-C17, C6-C20-aryl groups, preferably phenyl, C2-C20-alkenyl groups and C7-C20-aralkyl groups.