 The 1939 Grand Prix was almost called off, but went ahead in spite of an entry of only 60 riders.After World War II the "new Clady circuit" was used that, due to road improvements, was now 16.5 miles in length and in use between 1947 and 1952.In 1953 the race was moved to the 7.401-mile Dundrod Circuit where it is still held.