Best Seller | Treadmill Doctor Elliptical Ramp Roller for NordicTrack ProForm and Healthrider models Part Number 238880 This is a Treadmill Doctor Elliptical Ramp Roller. Part Number: 238880. Used on the following models: Epic: Free Spirit 160 - 831.307140. Gold s Gym: Cross Trainer 510 - GGEL604070 Cross Trainer 510 - GGEL604071 Cross Trainer Plus - GGEL679070.... more | | $43.99 FREE shipping go to store |