Mobile service and roadside are different things
Both are offered here, and they solve opposite problems.
Mobile service is planned: tires changed at your yard or site, at a time you chose, usually across several units in one visit. It removes a run of trips to the store.
Roadside assistance is unplanned: a unit has stopped somewhere it should not be, and a technician comes to it.
A yard full of trailers is the first. A truck on the shoulder at 2:00 AM is the second.

