This is where you make the mistake. It is 5 minutes in the water yes, but then 30 minutes on the bike (due to extra energy) and then another 30 minutes on the run. (these are obviously thumbsucks, but I'm trying to prove a point. I'm all for going minimalistic when trying out a new sport, but then do a minimalistic race like a tri sprint. IM is another animal. When you start hiking, your old running Nike's will be fine to climb up table mountain, but it wil not get you to the top of Kilimanjaro... Check this out for R1800 (I'm not any part of this website, but buy all my stuff from them being CT based) http://www.fluidlines.co.za/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=39&category_id=6&option=com_virtuemart&Itemid=55