The bike discipline is the longest in distance and duration of your race however it often tends to be one of the more underestimated disciplines. If you haven’t been on a bike for a few years, the saying ‘easy like riding a bicycle’ may spring to mind however failure to prepare may leave you lacking in energy and struggling on the run.
You don’t need to have the flashiest bike with all the bells and whistles, just a bike in good working order that will get you around the course and through training. If you are only renting a bike for the day of the event, you can still get your training in on gym/stationary bikes.
If you are already keen cyclist make sure your sessions are focused and specific not just general miles out on the road structured interval sessions will be important to help you get stronger and increase your speed.