Our AXEO front end kits include two identically built cartridges with our unique design due to a floating piston that separates the oil-filled damper chamber from a nitrogen chamber. This floating piston is essentially a load sensing component that allows for a nice comfortable ride while the suspension is traveling over normal road conditions (i.e. expansion joints, cracks, etc.) where you’re using the first couple inches of stroke. In the situation where the fork travels into the third and fourth inches of travel due to high speed cornering, hard braking, or extreme road hazards (i.e. uneven bridge joints and railroad tracks, manhole covers, drain basins, etc.) the floating piston is engaged to provide the extra bottoming resistance. This is due to the velocity at which the fork is traveling and the fact that the damper piston cannot keep up with the demand to flow oil through the piston and shim stack. The difference in pressure forces the floating piston into the nitrogen chamber which compounds the pressure and reduces the bottoming effect. The other benefit to this is that the nitrogen pressure when compressed assists the springs to return the front end back to the extended position, keeping the front wheel firmly planted on the road and the chassis back to the proper ride height. We have had resounding comments from customers that have installed the AXEO's stating that they’ve never felt the front end of their bike feel so stable, secure, and positive.