The lever arm for the rear shock pivot, measured from the frame pivot,
is roughly one third the length of the lever arm of the rear dropout.
This means that the travel of the rear dropout is roughly three times
the travel of the shock pivot, meaning that the rear suspension travel
of a Y bike is roughly 4 to 4.5 inches.
So, front and rear are matched.
> I just don't understand why Trek design a bike that have 4" travel
> up front but only 1.5" out back? regardless of geometry. I would
> think the front and rear should be within 1" of each other so you
> get them to react to impacts in similar fashion, reaction. I would
> get a soft ride up front (4" travel and a firm ride on back (1.5"
> travel) with the current stock set up?
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