It may not have the "X" factor bling, but here's why the more affordable Kuat Piston Pro is one of the best hitch bike racks ...

The two 3/2 valves are connected in parallel. This means that either valve X OR Y can be pressed to make the piston go positive. Pneumatic OR circuit This type of circuit is used to allow a ...

They may look like dampers, but the system is actually using Lego pneumatic pistons as springs for each wheel. The pistons are connected to the upper control arm of a double wishbone suspension setup.