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The tires of my Caterpillar 416 backhoe came filled from the factory with nitrogen, and the cat owner's manual advices to always use nitrogen only, to keep the rims from rusting, it's absolutelly dry, formula one tires are also filled with nitrogen to avoid changes in pressure, by the way my local kart club prohibits the use of nitrogen just to keep competition fair an lower costs, we race sudam motors wich are quite expensive.
Augusto
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