Home Cardio Training XtremepowerUS Ab Crunch Machine & Bike Cardio TrainingCore Workouts XtremepowerUS Ab Crunch Machine & Bike By Fitify - 01/07/19 48 0 you may also want to see Here is an ab crunch machine that doubles as an exercise bike to give you a killer workout. The XtremepowerUS Ab Crunch Coaster comes with urethane molded foam padded cushion and adjustable seat pad. Trending fitness gear: 25+ Must See Total Body Trainers More info is available here. *some of our articles have aff links. Please read our disclaimer on how we fund Exxponent.