rccardr 

You make some excellent points above.
SR short wheelbase bikes, like the CAAD frames, generally have the reputation for being the choice for shorter, faster rides where fatigue is less of an issue. So not the best choice for a Century. I’ve owned and refurbished many of them, and while lovable, I would not take one on a ride longer than 50 miles or so, even with 25mm high quality tires and an upscale wheelset.
ST bikes, on the other hand, with the longer wheelbase, are a pleasure to ride any distance you choose. They accept any upgrade that includes a 130mm OLD rear hub and depending on the rim used and actual size, will take 700c tires up to at least a 28, and in some cases a 32 (my 88 is happiest with Conti 28’s). Without racks they are a spirited accomplice to all sorts of adventure, including gravel roads. With a complement of racks they’ll serve well as a touring mount.

And yes, still safe to use and ride.