Hey, Ray. I'm actually not sure how your door comes apart. In some cases, you will need to remove the vertical side rails to access the bottom door rail. The best case would be to remove the mounting screws and tap off the bottom rail with a block of wood. With the bottom rail removed, you should be able to access the rollers. I cannot match up which rollers you need from the photos, so you will need to remove one of them for us to review. Dimensions would also be a big help.