Landice calls them deck slats and they are structural members that hold the two halves of the treadmill together. You can see that clearly on page 4 here: http

Landice calls them deck slats and they are structural members that hold the two halves of the treadmill together. You can see that clearly on page 4 here: https://www.landice.com/sites/default/files/Install%20TreadBelt%2C%20Deck%20%26%20Impact%20Absorbers.pdf https://www.landice.com/sites/default/files/Install%20TreadB... (Aside, but I love that Landice puts their excellent technical documentation online.) If they also serve a safety purpose, great. (My True has these too, but there's about 2-3" between the horizontal bar and the belt.) The Peloton Tread+ must have the horizontal structural cross-members inside the belt. They'd have to make the side rails taller to accommodate a safety bar: https://support.onepeloton.com/hc/en-us/articles/360035933551-Slat-Belt-Sagging-Underneath-The-Tread- https://support.onepeloton.com/hc/en-us/articles/36003593355...