Rubber composition and pneumatic tire

A rubber composition comprising:

• a rubber component including, based on 100% by mass of the rubber component:
• 5 to 65% by mass of styrene butadiene rubber (A) having a styrene content of 6 to 14% by mass and a vinyl bond content in a 1,3-butadiene moiety of 10 to 70 mol %;
• 20 to 75% by mass of styrene butadiene rubber (B) having a styrene content of 16 to 28% by mass and a vinyl bond content in a 1,3-butadiene moiety of 10 to 70 mol %;
• and
• 5 to 50% by mass of styrene butadiene rubber (C) having a styrene content of 32 to 40% by mass and a vinyl bond content in a 1,3-butadiene moiety of 10 to 70 mol %,
• the rubber composition further comprising, for each 100 parts by mass of the rubber component:
• 1 to 30 parts by mass of a low molecular weight conjugated diene polymer having a glass transition temperature of −75 to 0° C. and a weight average molecular weight (Mw) of at least 1.0×103 but less than 1.5×105;
• and
• 10 to 150 parts by mass of a silica having a nitrogen adsorption specific surface area of 40 to 400 m2/g,
• wherein said rubber composition comprises not less than 95% by mass of high molecular weight conjugated diene polymers having a glass transition temperature of −75 to 0° C. and a weight average molecular weight (Mw) of 1.5×105 to 1.5×106, and
• wherein said rubber composition has a tan δ peak temperature of not lower than −20° C.