The wheel shape and diameter must suit the running rail. A visually similar wheel is not enough to establish compatibility. Ordering from an approximate photograph can leave the door unsupported or incorrectly aligned, so confirm the part information before committing to a replacement.
Check the accepted panel through its ordinary movement after replacement. Stops and closing alignment should be considered alongside the rollers. The task does not include powered operators, access-control integration or certification of a specialist door system.
A panel can have more than one roller assembly, and the condition of each matters. Discuss whether compatible assemblies need replacing together. Replacing only an obvious damaged wheel may leave an uneven panel if the other support is worn or cannot be adjusted correctly.
Replace accessible compatible roller assemblies on an accepted panel, set the height and check ordinary travel and stops. Scope limits: Ordinary non-powered safely handled panels only. No heavy specialist lifting, glazing work, powered operators, structural changes or access-control integration.