Quote:
Originally Posted by 2000mc
...I haven't seen a dimpled helmet, but I know the last street bike helmet I bought, shoei claimed to of done work to try to neutralize changes in lift and drag depending on the direction you're looking. So even though it clearly has a front, I could see dimpling tring to minimize the effects....
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Neither of these image prove the idea works, but it does suggest that people with significant budgets are experimenting (maybe often merely marketing experiments):
