The GRIT Freedom Chair uses bike wheels (mountain bike, street bike, etc.). You can inflate the tires using a standard bike pump. In this tutorial, we explain how the valves work.
As with any device using pneumatic tires (those filled with pressurized gas or air), it is important to keep an eye on your tire pressure. Different rides and different performance goals require different tire pressures; checking your tire pressure is an easy way to make sure you're moving as efficiently as possible.
For general use, GRIT recommends keeping all three Freedom Chair wheels at 45 PSI. If going out for a pavement-only ride, increase your tire PSI by a bit; if going out for a rough-terrain-only ride, decrease your tire PSI. Refer to the inner wall of the wheel for the manufacturer-declared PSI ranges.
Below, see one of GRIT's founders and engineers, Ben, talk about how to inflate those tires!