The Škoda 30Tr SOR is a full-sized low-entry trolleybus produced in cooperation of Škoda Electric (subsidiary of Škoda Transportation) (electrical equipment and assembly) and SOR, which supplies the body based on the bus SOR NB 12.

The Škoda 30Tr is derived from the SOR NB 12 rigid bus.

Electric motor is located in the rear of the bus.

Body of the vehicle is welded from steel-voltage profiles, flashings from the outside and interior are lined with plastic sheeting.

In Czech and Slovak cities they replaced old high-floor trolleybuses Škoda 14Tr