Editing Improving fuel economy (section)
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==Tires and wheels== *Keep tires inflated to proper pressure. Keep a small tire gauge in the glove box and check the pressure monthly, be sure to check all four. If you don't have an air compressor get one of those mobile emergency use units, or use the gas station's air pump. *Exercise wisdom when choosing tires. Wide tires look nice, but present more rolling resistance to the ground. Use only the width you need. Also, take a look at the tire manufacturer's website and look at the actual tread width. The section width listed with the tire size is not indicative of the actual tread width that sees the road. *Use that same wisdom when selecting those big 22" heavy wheels. Although wheels won't affect steady state MPG, the added rotating inertia can affect MPG if a lot of speed changes are used. It takes more right foot input to get big wheels up to speed. *Another consideration is the tire's rubber compound. Touring and economy tires usually use harder compounds which sacrifice grip for longevity. As a very general rule, tread block size is often correlative. Smaller treadblocks like can be found on touring and utility tires often correspond with harder compounds. Harder compounds and smaller treadblocks can mean a little extra MPG help.
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