One of my current bikes has a 72 Degree seat tube and my saddle top (in line with seat tube) is 762mms above the BB center.
I am using a 20mm offset post and my preferred saddle (Brooks Swallow) is maxed in rearward adjustment. I can FEEL the need to move farther rearward in all conditions. I'd like to stay with the same post and saddle for my new build, so I am playing with seat tube angles to change saddle placement.
If I maintain the current saddle height, but change the seat tube angle to 70 degrees, how much rearward have I moved the saddle in relation to the BB?
Is there a feature (that I am missing) on BIKECAD that would allow me to see the results these changes? Or, is there a rule of thumb or a math formula that I could use while designing my bike?
Thanks very much