[Dave at Pelican Parts]

Yes, but it's not "dry air". The regular "wet" stuff will expand more than dry air (or pure nitrogen, or CO2). So you have to fiddle more with the tires to keep them at their optimal pressure.

It's the kind of thing that folks with mega budgets use, with marginal benefit for most of us. Or perhaps some of the users are simply looking for a way of intimidating their competition in the paddock...

--DD