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Yeah, bearing drag is a throwaway term in the large majority of engineering problems. In a biomechanics course I took years ago we learned that for a cyclist, the energy lost to friction in the rider's joints is far greater than that lost to the wheel bearings.
As Frank Lee has pointed out, we still have brake calipers that don't retract. How carmakers can drone on about their amazing technology and commitment to efficiency when this issue has been around for decades is beyond me.
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