The Proform 248134 Front Roller helps support smooth belt movement and stable operation on compatible treadmill equipment. Positioned at the front of the walking platform, the roller works with the treadmill belt system to help maintain consistent belt travel during use. Replacing a worn or damaged front roller can help reduce uneven belt movement, unwanted noise, and operating interr... https://www.wholetoolbox.com/proform-248134-front-roller/248134.html