Originally Posted by RobbieTunes

My guess is that, at 54 years old, doing one triathlon a year, simply buying a $10,000 bike will make him maybe 2 minutes faster, at most, over the 40k bike distance. Doing other items on the list, without the $10,000 bike, will beat that. Been there, done that, same distance.

Gear to your optimum range
another hour a week in the pool
another hour a week running
another hour practicing transitions
know your course and maintain momentum
shift without upsetting your pace
balance the effort you put into each leg

or

buy a $10,000 bike.