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This is the most aerodynamic option
The VW GTI alloy 9 spoke rim gave me the best mpg in 2 days of testing and previous extended road trips. The alloy rims alone were better than with flat coroplast wheel covers.
Edit- It turns out this statement may be slightly misleading. Read on
Last edited by COcyclist; 04-20-2020 at 12:18 PM..
Reason: I tried everything I can think of to hot link a photo
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