Sports shoe producer K-Swiss Inc on Thursday reported a better-than-expected 48.5 per cent jump in second quarter earnings as its sales were boosted by orders from retailers concerned about a possible strike by West Coast dockers. The California-based company said its net income reached $6.1 million, or 30 cents a share, from $4.1m, or 20 cents a share, in 2001. Total global revenue surged 34.5 per cent to $74.5m from $55.4m.