TT Circuit Assen

Known as 'the Cathedral' of motorcycle racing, TT Circuit Assen is the only venue to have held a round every year since the World Championship began in 1949, though it moved to this purpose-built 4.5km layout in 1955. Its 18 corners — six left, twelve right — mix high-speed sweeps with tighter technical sections, demanding constant direction changes and strong rear grip through every apex.