Head Angle Change With Suspension Travel
From Pvdwiki
According to very accurate calculations that I have done, the head angle will change on a hard tail mountain bike approximately 0.0521° per mm of travel if it has a 1058mm initial wheelbase. The bottom bracket height will change approximately -0.3868mm with each mm of suspension travel.
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
Head Angle Change
Bottom Bracket Height Change
Mechanical Trail Change
