I'm doing my first IronWoman biathlon on the 27th and a bit paranoid about getting a flat during the cycling portion. I was looking at putting in some type of flat restistance race-ready tubes but bike shop mentioned putting on rim strips? Completely clueless on this recommendation--rim strips alone or with the new tubes--no rim strips--no new tubes? any thoughts? I'm usually very happy with my normal tubes but I had a flat last night on the cycling course and now I'm worried. The biathlon is intimidating enough without having to stress about a flat tire! Thanks!

~AG~