Rollers for sliding glass door
Thanks for writing in! There is a strong possibility we can supply a replacement for this sliding door roller. Although, I'm afraid we cannot identify it with it still installed in the door.
We'll need to see its details to identify the correct match. Please see the video tutorial below for a detailed explanation. There is also one, tagged below, with instructions on removing/installing the rollers.
Thanks for the photo. This roller wheel looks like it can be replaced with the 81-228, 81-236A, or 81-237. To determine which of these is the right fit, you'll need to confirm the diameter of the existing wheel.
If you need the axles/bearings to complete the installation, I suggest taking a look at the 81-310 Roller Axle Repair Kit.