Running decks Treadmill deck replacement: choose a standard size or order a tailor-made treadmill running deck. By removing the motor cover and one of the back end caps, you can easily measure the running deck. Scroll down for deck options. We manufacture tailor-made running decks for all brands of treadmills, with standard materials (for home use treadmill, with max deck width of 60 cm) and extra-resistant decks (for large decks and for gym equipment).