Shirogorov Sprint Runs, every run on record.

A Sprint Run is a numbered limited pre-series from the workshop, almost always thirty pieces on single-row roller bearings, on a design that is either new or a material variant of a production model. It sits between serial production and Custom Division, and the two are mixed up constantly, partly because the workshop's own dealers have listed Quantum-family runs under a Custom Division heading. The factory does not catalog these runs, so the Models page does not carry them; this register does, one record per run, with the pieces, steel and bearings of each, the label a buyer meets on a listing, and the serial model in the Model library that the run precedes or varies.

The registry lists every run by year, newest first, with the runs whose year is not established at the end. Filter by line, steel or bearing system; click the name for the record. Where a run has a First Production or Custom Division counterpart on the same platform, the record links to it.