My wife maybe start triathlon

I have done triathlon for 7 years.  And recently, my wife said she want to challenge triathlon, too.

She already be able to swim and run, but now she doesn't ride bicycle. So, now I research the bicycle for her. Ofcourse, we use a road racer for triathlon race. My wife is afraid of sports' cycle becouse of its hi-speed, because she is beginner of sports bike. So, now I consider the security of the bicycle.

I hope I can find a good road bike for her.