A rear bicycle suspension has a main frame including a seat riser tube, a down
tube, head tube, and a bottom bracket housing having left and right sides, a guide
arm and a shock mount attached to the main frame, a pair of swing arm assemblies
each one in pivotal attachment on either side of the main frame at a first pivot
point and to a bell crank at a second pivot point, the swing arms in rearward extension
form the first and second pivot points to at least one rear swing arm attachment
point, and further including a lever arm connected between the first and the second
pivot points, a guide arm having first and second ends wherein the first end in
pivotal attachment to the guide arm bracket at a fifth pivot point and the second
end extends upward and rearward from the fifth pivot point, wherein the bell crank
is pivotally connected between the lever arms at the second pivot point and to
the guide arm at a third pivot point, a shock absorbing member in pivotal attachment
at one end to the shock mount and at another end at a fourth pivot point to the
bell crank.
