Just a poll. How many people race on a wheelset they use only for racing? If so what do you train on vs. race? I just bought a pair of Eurus to race and ride 2-3 year old Ksyrium Elites to train. Not a huge difference but maybe a placebo effect on race day as climbing and sprinting do seem improved and overall stiffness and snappiness seems improved. I couldn't afford anything carbon and got a great deal on the new Eurus so went for it.