I'm 5'9".
I sat on a 54 Trek 1.5 and a 56 Trek 1.5 and a 58 Trek 1.5.
The 56 was the Baby Bear "just right" fit for me personally.
When I rode it, that's when I really knew it was the one.
I personally love to have the option to stretch out on long rides.
Your size will depend on your personal inseam/torso/arm measurements.
As far as I'm concerned, it's no contest.
Trek...all the way. While I love my CAAD9, the Trek 1.5 was superior on long fast rides.
It's like riding on glass...that's how smooth it is. It's regularly compared to decent entry level carbon bikes.
I miss that high tempo, high speed smoothness from it. That's why a carbon bike is in my future.
The CAAD is a frigin' awesome bullet of a bike, but I'm ready to start putting in some centuries now.
Try out a 56cm Trek just for *****s & giggles.
You just might find the riding experience different than the sitting experience.
And do yourself a favor...while at 15 mph, get up and sprint that female dog!
She's going to set you off as if you were launched by a big rubber band!
It's a really fun bike to ride and again...smoooooth!
Spec can't touch the Trek there.
I think you're at that stage where the ride will have to determine your pick.
If I remember correctly, Trek dealer's closer? Trek's cheaper? 150 5700 group?
And, (IMO) Trek's way hotter looking! But again, that's just my personal opinion.
Hurry up already!
You're missing good riding weather bro!