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The Water Cooler
General Discussion
Poll: Air vs Nitrogen
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<blockquote data-quote="tRidiot" data-source="post: 2529723" data-attributes="member: 9374"><p>Oxygen does diffuse more quickly than nitrogen through the thick rubber of a tire... about 3 1/3 times faster, to be sure... however, what you need to know to make an accurate assessment of if it is a worthwhile investment is:</p><p></p><p>1. What is the actual rate of diffusion in (cm^3, say) for each gas.</p><p>2. How that rate is affected by the thickness of your particular tire at the specified inflation pressure given each or variable atmospheric conditions.</p><p>3. Apply that rate of diffusion at a volumetrically-reduced amount given the actual partial pressures of oxygen in atmospheric air.</p><p>4. Determine whether it is worth the additional cost/effort to have nitrogen placed than the simply check your tire pressure routinely, i.e., once per month, once per week, quarterly, etc.?</p><p></p><p>Claims of improved gas mileage are exponentially better related to maintenance of proper pressure than to the lighter atomic and hence molecular weight of nitrogen, as I have heard claimed by some unscrupulous technicians attempting to sell nitrogen.</p><p></p><p>As for me, I've never had a problem that I know of with tire rot from the inside attributable to oxygen.</p></blockquote><p></p>
[QUOTE="tRidiot, post: 2529723, member: 9374"] Oxygen does diffuse more quickly than nitrogen through the thick rubber of a tire... about 3 1/3 times faster, to be sure... however, what you need to know to make an accurate assessment of if it is a worthwhile investment is: 1. What is the actual rate of diffusion in (cm^3, say) for each gas. 2. How that rate is affected by the thickness of your particular tire at the specified inflation pressure given each or variable atmospheric conditions. 3. Apply that rate of diffusion at a volumetrically-reduced amount given the actual partial pressures of oxygen in atmospheric air. 4. Determine whether it is worth the additional cost/effort to have nitrogen placed than the simply check your tire pressure routinely, i.e., once per month, once per week, quarterly, etc.? Claims of improved gas mileage are exponentially better related to maintenance of proper pressure than to the lighter atomic and hence molecular weight of nitrogen, as I have heard claimed by some unscrupulous technicians attempting to sell nitrogen. As for me, I've never had a problem that I know of with tire rot from the inside attributable to oxygen. [/QUOTE]
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