Check your tires
Getting a flat can ruin your whole day. You can prepare and ride your bike as much as the pros in the leadup to the race, but if you get a flat tire during the day because you didn’t notice how worn out it was or the massive slice in the sidewall before Stage 1, your day could be ruined. Take the time to check your tires over prior to the start of the race. Maybe invest in some new tires prior to the event. You’ve put the time into preparing your body, so it’s worth putting the time into preparing your bike.