Bicycle under costruction whose mobile components are:
A - Top tube length
B - Seat tube length
C - Head tube length
D - Saddle height
E - Handlebar height
F - Stem length
G - Seat tube angle
H - Saddle set back
I - Pedal cranks horizontal reference
L - Flywheel
M - Flywheel speed control
Having taken the body sizes, you can set all the measures on the bicycle you are building.
Then you have to check the right position of the rider on the “draft bicycle”, in order to transfer the maximum power with the minimum effort.
Now, it's critical to verify all contact points, even if the frame seems right: cleat positioning, saddle height, saddle set back, handlebar height, stem length.
Features a variable speed flywheel to check the right pedaling.
Classical professional tool.