This would only apply to people that train and race on the same bike - just curious if you have a training wheel/tire set and a race wheel tire/set. Or maybe just a bigger tire for training that you switch for racing. I ask because this is the first time I've ever upgraded from OE wheels, and I'm wondering if I should save them for races. Also, I typically train on Conti Gatorskin 700x25 non folding tires. I also have a pretty new set of 700x23 ultra race kevlars in the garage. Would it be worth switching to the 23's for races (usually sprint or oly distance)?