I am looking for a carbon frame that will take 38's to 40's with mud. I have no experience with Chinese carbon frames, and have been pouring over the internet.
I am curious if anyone here has done a build using Miracle's frame(s) and/or ridden them for any period of time.
What bike are you riding now...and comfortable on? Do you know your preferred stack and reach? The frame you linked has a pretty short front end for a 'gravel' bike. Long and low would be another term to describe it. The reach (length) of the 56cm is ~1mm longer than the 60cm of the Salsa Warbird (383.5 vs 392.2mm). The front end of the Warbird is 80mm taller.
Anybody wanting to go this Miracle Bike route had better be used to riding long and low. It has the fit/sizing of a performance/race oriented road bike. While my Warbird example is a somewhat tall (front end) bike, the more popular multi-hour adventure type bikes all seem to have higher front ends.