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Originally Posted by Jim-Bob
I am curious to see if I will see a noticeable improvement with aerodynamic changes?
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The grill block is easy to try out, so why not do it and see what gives ?
Obviously, the slower you drive, the less effect the aerodynamic mods will have. They really come into play at around 40 mph - though any cyclist will know there's a huge difference between 15mph and 20mph
An air dam is another easy mod, and rather effective on trucks.
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I can't use smooth wheel covers because the truck has alloy wheels ( and besides I need the brake cooling)
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Brake cooling isn't really an issue.
If you're ecodriving, you should already be using them sparingly anyway.