I have some questions since this will be my first endurance race. I'm currently prepping my SV for VIR. I have team of 3 right now and have a 4th interested if we decide to go with 4. Do most people run 3 people or 4 people? Only one of the team member has endurance racing experience. Also this bring up the question of the game plan for stints. With 3 racers, I was thinking do 3X 45min then 3X 35min. With 4 riders, I'm not sure how to break that up since I doubt the SV will go an hour (I may be wrong here, I'm just not sure). Tires, I'm assuming the race will pretty much consume a set of tires. I'm assuming that we need to start the race with a fresh set (as in, do not practice on them on friday). Is this correct?