Head Angle Change With Suspension Travel
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Wheelbase is the overriding factor for how the geometry changes. Different wheelbase bikes will change at different rates.
Formulas
Here are the equations:
- A12 = Initial Head Angle
- B12 = Fork Offset
- C12 = Sagged fork length
- D12 = Initial Wheelbase
- E12 = Initail BB Height
- F12 = Chainstay Length
- G12 = Wheel Diameter
- H12 = Fork Compression or extention from sagged
These formulas are not designed to work with 2 different wheel sizes and do not account for tire deformation or chassis/fork flex.
Otherwise, they are perfect.
Head Angle Change
or in a more round about way:
Bottom Bracket Height Change
or in a more round about way:
Mechanical Trail Change
Wheelbase Change
