Treadmill Idler Spring 158731 Treadmill Idler Spring 158731 This part will work on many of the ICON Health and Fitness models. models. Icon Health and Fitness distributes exercise equipment under the following brand names: Nordic Track, Pro Form ICON, Reebok, Body Fit, IMAGE, iFit.com, Sears., Weslo, Weider, Epic, Healthrider, Gold?s Gym, Free Motion