Description: Four (4) mechanical wheel/roller games can completely replace the gym. The through hole diameter of the bearing is about 5/16 inch. All bearings are included. Support models 1000, 1100, 1400, 1500, 1700, 1800, 1900, fits Achiver, fits Core, fits Elite, fits Force,fits Gold, fits Gold Plus, fits Max,fits Platinum, fits Platinum Plus,fits Power Platinum,fits Premiere, fits Supreme. Doesn't fit 1600. Our rollers are made of high-quality engineering material solid plastic. This means that your gym will run again, and it will run at the highest efficiency. The wheels are made of softer and quieter materials. Tested and approved in laboratories and gyms. Stronger, quieter and more durable than the original and any other after-sales products. .
