Our compatible G-ym Replacement Wheel Roller is designed to fit Total Gym 1000, 1100, 1400, 1500, 1600, 1800, 1900, and 1700 models to ensure a seamless fit and help you restore optimal performance to your fitness equipment The replacement wheels feature an upgraded rounded wheel structure with an increased load-bearing surface that is more abrasion-resistant, less prone to damage, and smoother in use, drastically reducing the frequency of replacement and ensuring that your workout is uninterrupted The four wheels/rollers we provide are made of durable engineering plastics, with pressure and wear-resistant properties, which prolongs the service life and effectively reduces friction and noise, allowing your equipment to run stably Inferior quality rollers are fragile after prolonged use and may affect the experience of using the equipment. Our upgraded rollers are durable and wear-resistant, not easy to break, providing you with stable support and balance to enhance the sports experience If you have any questions, please feel free to email or message Our compatible G-ym Replacement Wheel Roller is designed to fit Total Gym 1000, 1100, 1400, 1500, 1600, 1800, 1900, and 1700 models to ensure a seamless fit and help you restore optimal performance to your fitness equipment