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Join Date: Aug 2010
Location: Madison, WI
Posts: 11,334
Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.
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If you subtract weight from the bike and attach that same amount of weight to the wheels, so the total bike weight is the same, the bike will not require more work to keep it going. Conservation of momentum.