Quote:
Originally Posted by NiHaoMike
Hair is too poor a conductor of heat and too thin to act as the fins of a heatsink. A significant amount will degrade cooling by acting as an insulator. However, it is also true that a close shave is not necessary for great performance. Just keeping it trimmed is enough. Then again, a lot of bike riders at my university (both racers and non-racers) shave their legs for looks.
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Bob has it right. It"s not for looks. It's for massage and road rash events.