Rubber composition for canvas chafer, and pneumatic tire

Abstract

Provided are a rubber composition for a canvas chafer which, despite being low cost, is excellent in rim chafing resistance, resistance to rim damage, and processability (sheeting processability, rubber flow in the tire, adhesion to adjacent components) and performs well with respect to low heat build-up, and a pneumatic tire including the composition. The invention relates to a rubber composition for a canvas chafer, including: an isoprene-based rubber; a carbon black having an N2SA of 65-200 m2/g; and sulfur, wherein an amount of the isoprene-based rubber is 25-80% by mass and an amount of butadiene rubber is not more than 40% by mass, each based on 100% by mass of a rubber component of the rubber composition, and an amount of the carbon black is 40-80 parts by mass and an amount of the sulfur is 1.0-2.7 parts by mass, each per 100 parts by mass of the rubber component.

Dependencies are inferred from the claim text.