Issue link: https://read.dmtmag.com/i/34500
The first step in properly measuring your MICHELIN ® ® HOW TO PROPERLY MEASURE PRESSURE X One tires is to have an accurate ® ® pressure gauge. Pressure gauges should be checked weekly against a master calibrated pressure gauge. Tire Billy’s and Thumpers are not considered accurate tire gauges! Sometimes, reading the gauge can present difficulties if personnel are not properly trained. Spend the time to explain to your personnel the increments on the gauge and how to properly read pressure. It is highly recommended that you use a real tire and let the trainee take the pressure and tell you what it reads. Proper air pressure maintenance is critical to obtain optimized performance from your MICHELIN ® X One tires. As part of your pre-trip ® inspection, it is recommended that you check your MICHELIN X One tires daily with an accurate tire pressure gauge. Check all tires when cold; at least 3 hours after the vehicle has stopped. Never bleed air from hot tires. Underinflation can lead to: • Adverse handling conditions • Zipper ruptures • Casing fatigue and degeneration • Irregular wear • Decreased tread life • Reduced fuel economy Overinflation can lead to: • Adverse handling conditions • Reduced resistance to impacts and penetrations • Increased stopping distances • Irregular wear • Decreased tread life THE USE OF NITROGEN IN MICHELIN ® TRUCK TIRES Nitrogen is an inert gas and will not adversely affect the inner liner of the tires nor will it adversely affect the performance of the tires under normal operating conditions. Therefore, the use of nitrogen in MICHELIN ® Tires will not affect the warranty associated with the tires. Please refer to the MICHELIN Truck Tire Warranty Manual (MWE40021) for what is and is not covered by the warranty. Truck TEMPERATURE/PRESSURE RELATIONSHIP GRAPH This graph displays the reason behind checking your tires when cold. As ambient temperature increases, pressure increases. An increase in ambient and/or operating temperature will result in an increase in tire pressure. Checking your tires when hot will result in an elevated reading. A good field thumb-rule to use is that for every 10-degree F increase in temperature above 65, the tire’s pressure will increase 2 psi. 100 99 98 97 96 95 94 93 92 91 90 65 70 75 80 85 90 95 100 105 110 115 Ambient Temperature (Degrees F) MICHELIN X One Tire Maintenance 39 ® ® Pressure (psi)