Sumitomo Rubber Industries Ltd. (TYO:5110) has launched a series of new Dunlop-branded go-kart tires with approval from the CIK-FIA, an international organization for kart racing. Offering new specs, the series launched on Jan. 9 and is available in six sizes. For dry surfaces, the series is available with one of two rubber compounds. These are DG M, which offers both…