Difference between revisions of "Head Angle Change With Suspension Travel"
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| − | According to | + | 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:Bicycle]] | ||
[[category:Frame Building]] | [[category:Frame Building]] | ||
Revision as of 00:45, 14 December 2007
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
