View source for Head Angle Change With Suspension Travel

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==
[[Image:Head-angle-change.gif]]
==Bottom Bracket Height Change==
[[Image:Bb-height-change.gif]]
==Mechanical Trail Change==
[[Image:Mechanical-trail-change.gif]]

[[category:Bicycle]]
[[category:Frame Building]]