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Old 06-06-2011, 12:42 PM   #8 (permalink)
instarx
EcoModding Dilatant
 
Join Date: Jul 2008
Location: NC
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Volvo - '00 Volvo V70 XC AWD SE
90 day: 27.7 mpg (US)
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It wouldn't be practical to add even a slight bulge to the wheels. It would change the trailer width, which is already as wide as is legally possible. Also, most people don't realize what a hard life trailers have. Skirts around entire trailers would be ripped off or damaged pretty regularly. Trailers have to deliver goods in some pretty tight places in less than perfect conditions.
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