![]() ![]() He runs 85 psi in his drive tires and 90 or 95 psi in his trailer tires, adjusting the pressures for seasonality. No tire pressure monitoring system or automatic tire inflation is involved. ![]() The related tire program includes annual three-axle tractor alignment, annual replacement of the shock absorbers, and regular manual tire pressure checks. His fleet gets 500,000-575,000 km out of drive tires. How does one coax more than half a million kilometers out of a set of drive tires? You pay attention to them, advises Mark Reavely, fleet maintenance manager at Trans-Frt McNamara of Ayr, Ontario. Drive tires running to 800,000 km are not unheard of in these two fleets. They report tires running out to 400,000 and 500,000 kilometers before coming off the truck. The two fleets we interviewed for this article are running 85 psi and 90 psi in their drive and trailer tires in longhaul Canada-U.S. If you are arbitrarily inflating your drive and trailer tires to 100 psi, you might be giving up a little or a lot of both. Tire inflation pressure affects the footprint of the tire, traction, and tire life. The number is easy to remember, but you may be sacrificing miles-per-32nd for the sake of convenience. ![]() Evidence suggests the set-it-and-forget-it, all-position, one-size-fits-all inflation pressure of 100 psi is not the best way to maximize tire value. Tire inflation pressure is a real conversation killer at a party, but it’s something fleets should be talking about with their tire vendors, shop personnel, and drivers. ![]()
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