Unbound is coming! What to do you think will be the hot new marginal gain on course? Ultra Narrow bars? Weird helmets? Aero Chainring covers? One thing we can tell you is our #Silca Aero socks can save 5-10w over such a long day, we are talking multiple minutes of time savings just for a sock change. But the biggest question of all.... What tires will @dylanjawnson be running?