load rating fun - Saabnet.com Bulletin Board
Load rating and recommended tire pressures tend to play off against each other. Lower the load rating and you need to increase the tire pressure. That said, the recommended tire pressure with the standard tire of 35 psi is on the high side for the load rating of the factory tires. I don't recall what the recommended pressure is for the 225-45-17s that were the sport tire up through 2006 or 7. Those had load ratings of 94 in XL trim.
At one point I had a formula for adjusting pressure vs. load rating that I found from the Rubber Manufacturer's Association site.
posted by 65.35.8...
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