From a fast road position? Does not compute. How are you going to maintain your arbitrary 60/40 with the same effective ST angle and the longer front-center of the gravel bike? Are you going to lower the rider over the front end?
Moving from road to off road positions usually become less static because of different terrain. That’s reason to look again at all your road measurements. Of course a good starting point is probably your road measurements on a frame with some further possibilities for adjustment.
From a fast road position? Does not compute. How are you going to maintain your arbitrary 60/40 with the same effective ST angle and the longer front-center of the gravel bike? Are you going to lower the rider over the front end?
Moving from road to off road positions usually become less static because of different terrain. That’s reason to look again at all your road measurements. Of course a good starting point is probably your road measurements on a frame with some further possibilities for adjustment.