BK; 1-1/8"; Shoulder width: 17.3 inches (440 mm), 17.7 inches (453 mm), 17.7 inches (440 mm), 26 inches (80 mm), Travel design: 18.1 inches (453 mm), 26 inches (100 mm), Label design; OF: 160 mm (B-SIDE, 850 mm) 26" crown design 650B (27.5") MTB Fork Disc compatible