IAN Rayson and Ruth Hunt lived up to their reputations as Asia's top triathletes with comprehensive victories in the men's and women's divisions at the Puma international sprint triathlon in Tai Po yesterday. Rayson, a 30-year-old former serviceman who is now a coach for the Hong Kong Triathlon Association, led all the way to win the men's open category in one hour, one minute and 23 seconds. He was first to complete the 750 metres swim, with local junior Brian Bozarth and Wan Shu-wah hot on his heels, and he maintained a 15-second lead in the bike-run transition. Con O'Kelly, the Hong Kong number two, and China's Quo Qingshan overtook Wan during the 20-kilometre bike section. Experienced Rayson ran a strong race to claim the $4,000 first prize while Bozarth held on in the five-kilometre run for second in 1:03:14. O'Kelly packed a strong finish to cross the line only 16 seconds behind. Quo was a distant fourth in 1:06:27 with Wan and Alan Wilson filling the minor positions. ''It was easier than I thought,'' said Rayson, adding: ''I knew I had the race won when I was still ahead after the bike because running is Brian's weakest discipline.'' There was a nasty cycling accident which saw China's Yang Shunjiang being sent to hospital for treatment to a cut on his left buttock. Hunt also led all the way from international teammate Sue Ross. Hunt was the first woman out of the water just ahead of Julia Cree and China's Zeng Xiao and she extended her lead in every discipline to finish with a winning time of 1:07:28. Ross moved into second on the third lap of the bike and held on to cross the line in 1:09:02, ahead of Zeng, Chiu Pik-kwan and Cree. Hunt said: ''I was a little surprised to be in the lead after the swim because Zeng was ahead of me at the Asian Championships in Tienjin three months ago.'' Twenty-year-old Zeng, the 1992 Asian junior women's champion, blamed her defeat on insufficient preparation. She said: ''I haven't had any serious training since the Asian Championships on July 11. I only learnt of this invitation three weeks ago but it was too late to start a decent training programme.''