I had just bought a new double-wide garage door, and looked at the rollers that came with it - looks like junk to me. I searched and found these, so as the installation happened, these rollers are in from the very start. Why wait a year or two and then replace the originals? Looking forward to a long smooth life from these!
As a first time re-assembler of a garage door opener, the replacing of the gear and sprocket mechanism ended up being straightforward enough for me to enjoy the satisfaction of having done a good job. Thanks to Preferred Doors Service for providing the goods I needed to look good