There are different physical demands on the body when riding a road bike vs. a touring bike. In general, a touring bike is heavier, and is optimized for all-day comfort rather than speed and acceleration.

A bike tourist typically carries a load. You might get by with 2 or 3 kg (five pounds) if you are heading out for a few hours, but if you are planning a multi-day trip, you could be hauling 10 kg (18 lbs) for a credit-card tour, and significantly more for a self-supporting tour.

If you are used to riding, say, a 9 kg (20 lb) racing bicycle, touring is a little like trading a sports car for an 18 kg (40 lb) station wagon... or suddenly exchanging one's 190 pound body for another that weighs 210 or 220.

You will likely notice huge differences between road racing and touring when you are doing hours of climbing in the mountains. Many tourists opt for extremely low gearing, much lower than you are proposing, for ascending hills. Low gears are also handy when riding against headwinds, or to make it easier to ride at the end of a long day.

Your (enviable!) fitness level might mean that you will be fine with your proposed gearing. But know that when bicycle tourists grumble, a frequent complaints is that their gearing is biased to much toward the high end.