The starting point for setting up a bike is the bottom bracket axle centre. Adjust top surface of saddle so it is at correct distance ( 0.883 x leg length ).
Next, set the saddle fore/aft so your hip ball joint centres are the correct distance from the BB. Some use pedal spindle with horizontal crank.
Next, the lumbar vertebrae should be at 45 degrees when the hands are holding on the hoods ( most used position ). When the lumbar vertebrae are at 45 degs, position the handlebars so they obscure the front axle.
When this is all set up sweet and dandy, take measurements for future reference.
Next, set the saddle fore/aft so your hip ball joint centres are the correct distance from the BB. Some use pedal spindle with horizontal crank.
Next, the lumbar vertebrae should be at 45 degrees when the hands are holding on the hoods ( most used position ). When the lumbar vertebrae are at 45 degs, position the handlebars so they obscure the front axle.
When this is all set up sweet and dandy, take measurements for future reference.