Head Angle Change With Suspension Travel
From Pvdwiki
Wheelbase is the overriding factor for how the geometry changes. Different wheelbase bikes will change at different rates. Other factors contibute, obviously, but their effect is very, very minor.
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
Mechanical Trail Change
