I am having the worst time finding a saddle that works for me on my 2016 Giant TCR.
My Giant saddle on my last bike actually worked well enough, except it didn't have a channel cutout, which led to some numbness, and that kind of scared me.
I would start by looking up the saddle that was on the TCR and getting all the specs, especially width and length
I have tried the Specialized Romin Evo. That one hit the backs of my legs as I pedaled. Seems that flat saddles are for me.
I tried a Romin for a week and really liked the ergonomics but I never felt fully centered on it. This was problematic because of the width of the channel.
I tried the Fizik Ardea VS MG. That has a channel, but was very uncomfortable.
I can't speak to this one
I tried the 2017 Specialized Toupe Expert Gel, which was comfortable (it is very flexible, but not a lot of padding) until I rode a time trial with it. I experienced some horrible pain while using my aero bars in the last 4 miles or so while leaning forward on the bars. I assumed the channel wasn't wide enough.
A lot of people either love the Toupe or love the Romin. So this may have just been a positioning thing
So I tried the Specialized Power Expert, since it is a cross between a TT saddle with no nose, and a road saddle. But after a 70mi ride yesterday, I know this saddle is not for me.This one also hits the back of my legs, and the extra pressure on my sit bones from the wide cutout was not comfortable at all.
The two people I know who ride a Power love it but both agree it can be really bothersome on longer rides. Also bear in mind the channel on this one is a lot bigger. I think these are meant more for in the droops, on the "rivet" kind of riders.
In addition to these I have ridden a Brooks Cambium C15, Fizik Aliante, Fabric Scoop Shallow & Flat and am currently demoing a Specialized Phenom. Here's what I can offer on these:
Cambium: REALLY comfortable if you're set up perfectly on it, but if you're running into issues on leaning over than this will bother you like it did me on longer rides. This would be my ideal saddle on a town/cruiser set up
Aliante: I have a love hate with this seat. At times it's been butter under me and others it's been problematic. No matter what the nose has always bothered me even though it's shaped like a Romin and Phenom. I think overall it was just a hair to narrow for me and when I'd slide forward it couldn't support me.
Scoops: The shallow is absolutely perfect for me on my mountain bike, but I couldn't get comfortable on my road bike. The flat I was almost certain would work, but I would get some rubbing on it because of just how flat it is (more on this later)
Phenom: I think this is going to be it, but I need more time on it to be sure. It has a channel which I've determined I need, it's shaped and it has the right curvature on the side. I just to spend some time on it get it perfectly dialed to know. I did 3-4 hours on it this weekend and hit some numbness on my sit bones but this is 100% to be expected on any new saddle set up.
Some tips:
Above all else make sure you know your sit bone width. As I said if the saddle that came with your bike would be a good gauge to help.
Also pay attention to the shape of the saddle. Look up T-shaped and Pear shaped saddles. This will help guide you into the shape you need, also note the curve of the saddle at it's widdest. For me I need something like the aliante or romin/phenom where it's gradual taper on width but then sharp curve.
If you're rubbing I suspect you're on a seat that is too wide or too flat. I had this problem with the Scoop Flat because it's a much flatter profile than the Aliante. Look at top down shots and rear view images of the two on google and you'll see what I mean.
Also make sure you're measuring everything, not just it being level. All seats have different stacks and lengths which will alter the placement.
This also means you're leveling the saddles based on the right spot. Each saddle can be different so do some searching on your particular one to see what people have based it on. Fizik has a video on YouTube explaining theirs.
Above all else all our asses our unique snowflakes and nothing we all recommend in a seat may work for you. If you have a place close with a saddle test program just use them. Give yourself a week with a solid 4-6 hours in the saddle.