Suspension damper having inertia valve and user adjustable pressure-relief

1. A system comprising:

a compression chamber having a volume reducing in response to operation of a suspension damper from an extended position to a compressed position;

an inertia valve to allow fluid flow into a first fluid path in response to an acceleration of at least a portion of the suspension damper, said inertia valve comprising:

an inertia mass moveable to an open position, in response to the acceleration of the at least a portion of the suspension damper, said inertia mass having an annular recess wherein said an annular recess provides fluid communication between an inertia inflow passage and an inertia outflow passage;

a blowoff valve to allow fluid flow into a second fluid path when a pressure in the compression chamber equals or exceeds a first pressure threshold; and

a pressure relief valve to allow fluid flow into a third fluid path when a pressure in the compression chamber equals or exceeds an adjustable second pressure threshold.

2. The system of claim 1 wherein the inertial mass is a solid block of high-density material.

3. The system of claim 1 wherein the inertial mass is a solid block of high-density material with no flow passages therethrough.

4. The system of claim 1 wherein the pressure relief valve further comprises:

a fluid bleed passage to allow a limited fluid flow between the compression chamber and a reservoir chamber,

the limited fluid flow occurring regardless of whether the pressure relief valve is in an open position or a closed position.

5. The system of claim 4 wherein a rate of the limited fluid flow through the fluid bleed passage is manually adjustable.

6. The system of claim 5 wherein the fluid bleed passage comprises:

a bleed inlet; and

a tapered bleed needle,

the rate of the limited fluid flow being manually adjustable by changing a distance between the tapered bleed needle and the bleed inlet.