Transport assembly of the smoking products manufacturing industry; the transport assembly comprises: a first conveying system for feeding components of the smoking products along a first conveying path to a first input station of a first manufacturing machine; and a second conveying system for conveying articles obtained from the components along a second conveying path from a first output station of the first machine to an input station of a second manufacturing machine (for example, a packaging machine); the first conveying system is configured to change the length of a stretch of the first conveying path; the second conveying system is configured to change the length of a stretch of the second conveying path; the mentioned stretches of the first path and of the second path are arranged overlapping one another and/or side by side.