["【Replacement】Replace Part Number: 238880Replacement for ProForm Freespirit Golds Gym HealthRider NordicTrack Reebok (Icon)" 【Material】 This part is made of reliable POM material which is wear-resistant and more durable providing smooth and stable movement for your exercise. 【Size】3" wide x 4" diameter 【MEASURE】Please measure your broken or other wheel prior to purchasing so that you can select the appropriate size replacement when buying new wheels. "【Function】The elliptical leg roller reduces friction to allow smooth movement of the pedals and provides a comfortable foot pedaling experience. It also helps to balance and stabilize the elliptical machines motion ensuring a comfortable and stable workout for the user."]