Why? Who needs that accurate of a tire pressure? Besides racers, who in many different racing types need very accurate measurements for exact same pressure in 2 or 4 tires, it turns out BMW and Audi now have TPMS sensors that read in tenths of a pound of pressure.
End user street prices ranging from $200 to $250 depending on hose/chuck options and your retailer.
http://prnewsbureau.com/580e-inflator-gage/
BMW and Audi displays read out tenths of a pound, which may or may not be accurate. The question remains is it necessary to be that anal, or are they doing that just because they can, not because they should.
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