An acceleration sensitive shock absorber, comprising: a main shock body configured to be operably coupled to a bicycle frame assembly, said main shock body comprising a main damper tube containing a damping fluid, a main piston coupled to a piston rod and movable within said main damper tube; a reservoir damper tube containing a damping fluid; a partition in said reservoir damper tube separating an interior of said reservoir damper tube into a first fluid chamber and a second fluid chamber, said partition comprising a compression valve that permits damping fluid to flow through said partition from said first fluid chamber to said second fluid chamber; an inertia valve comprising an inertia mass movable along an axis, wherein said inertia valve is operable for changing a damping rate of said shock absorber when said shock absorber is subjected to an acceleration force above a threshold value in a direction of said axis; at least a first fluid flow port that permits fluid flow from said first fluid chamber to said second fluid chamber, said at least a first fluid flow port having a first total flow area, wherein said inertia mass is normally biased in a closed position, in which said inertia mass covers said at least a first fluid flow port, and is movable in response to said acceleration force above said threshold value to an open position, in which said inertia mass uncovers said at least a first fluid flow port; a flow body cooperating with said inertia valve; a restricted flow path between said flow body and said inertia valve, a flow body cooperating with said inertia valve; said restricted flow path being downstream from said at least a first fluid flow port and defining a second total flow area that is smaller that said first total flow area for maintaining said inertia valve in said open position after acceleration force has decreased below said threshold value; wherein damping fluid flowing through said compression valve of said partition is able to move from said first fluid chamber to said second fluid chamber without passing through said restricted flow path. a main shock body configured to be operably coupled to a bicycle frame assembly, said main shock body comprising a main damper tube containing a damping fluid, a main piston coupled to a piston rod and movable within said main damper tube; a reservoir damper tube containing a damping fluid; a partition in said reservoir damper tube separating an interior of said reservoir damper tube into a first fluid chamber and a second fluid chamber, said partition comprising a compression valve that permits damping fluid to flow through said partition from said first fluid chamber to said second fluid chamber; an inertia valve comprising an inertia mass movable along an axis, wherein said inertia valve is operable for changing a damping rate of said shock absorber when said shock absorber is subjected to an acceleration force above a threshold value in a direction of said axis; at least a first fluid flow port that permits fluid flow from said first fluid chamber to said second fluid chamber, said at least a first fluid flow port having a first total flow area, wherein said inertia mass is normally biased in a closed position, in which said inertia mass covers said at least a first fluid flow port, and is movable in response to said acceleration force above said threshold value to an open position, in which said inertia mass uncovers said at least a first fluid flow port; a flow body cooperating with said inertia valve; a restricted flow path between said flow body and said inertia valve, a flow body cooperating with said inertia valve; said restricted flow path being downstream from said at least a first fluid flow port and defining a second total flow area that is smaller that said first total flow area for maintaining said inertia valve in said open position after acceleration force has decreased below said threshold value; wherein damping fluid flowing through said compression valve of said partition is able to move from said first fluid chamber to said second fluid chamber without passing through said restricted flow path.