01-08-2015, 03:26 PM
A Google search for "Schwinn 223 crank" yields this page: http://www.fitnessrepairparts.com/equipment/Select/7211/Schwinn/223, showing that it is a recumbent exercise bike with a square taper crank arm and hex bolt. Price for 2 OEM cranks is $30. As the cranks seem to have a curve outward it would be best to replace with original equipment. Your friend might try a local shop that sells Schwinn equipment.