Originally Posted by Kopsis

I have a C17 Carved on my gravel bike. I might have been fine with the C15, but the shop only had a C17 to test and it felt so good I just went with it. Note that my fit on the gravel bike is "relaxed" with a modest saddle-to-bar drop. A more aggressive position might call for the C15.

I have the Power Pro in 143mm on the CX bike. The 155 would have definitely been too wide for me. Why the Power when I liked the Brooks? The Cambiums are actually too comfy They have a lot of flex and CX race re-mounts are easier with a very solid saddle. Plus the C17 is kinda heavy for a bike I have to throw on my shoulder and run with.

The Power is a lot different than the GR2. The very short nose means you plant yourself in the sweet spot and stay there (no riding the rivet). I thought I was going to hate it, but tried it anyway on the advice of another rider and was really surprised at how well it worked. But note that my position on the CX bike is much more aggressive than the gravel bike. If you like a little more relaxed fit, the Power may not be a great choice.