Rubber composition and golf ball comprising it

A golf ball comprising a rubber composition comprising 100 weight parts of at least one natural and/or synthetic rubber component(s), 10 to 50 weight parts of fine inorganic fibers having an aspect ratio of 5 to 1000 and 0.1 to 15 weight parts of a non-sulfur type vulcanizing agent, the fine inorganic fibers being treated with a surface treating agent prior to mixing with said rubber component(s), said surface treating agent being selected from the group consisting of compounds represented by the formula I;

• ##STR3## wherein each R.sup.1 independently represents a substituted or unsubstituted divalent hydrocarbon group of 2 to 6 carbon atoms, each R.sup.2 independently represents a substituted or unsubstituted monovalent hydrocarbon group, each X independently represents a hydrolyzable group, a is an integer of from 1 to 3, and b is an integer of from 0 to 2 with the proviso that 1.ltoreq.(a+b).ltoreq.3;
• and compounds represented by the formula II;
• ##STR4## wherein each R.sup.3 independently represents a substituted or unsubstituted monovalent hydrocarbon group, each R.sup.4 independently represents a substituted or unsubstituted hydrocarbon group of 2 to 4 carbon atoms, each Y independently represents a hydrolyzable group, c is an integer of from 0 to 2 and n is an integer of from 1 to 6.