Dartmoor Exile Headset. Light and strong semi-integrated headsets for 1.5" head tube and with reduction to 1.1/8" fork steerer. Cups and top cover made of alu 6061-T6. With only 10mm stack height they fit to the frame like typical integrated headsets. Big sealed bearings made of Cr-Mo steel for long, troubleless riding. Bearings with anti-rust titanium finish. Deep cups construction protects alu head tubes even when riding realy tough.