Specialized Integrated Headset Complete, 1-1/8 Upper, 1 3/8" Lower MIPS Drop-Stop chainrings are designed for

Drop-Stop chainrings are designed for use with 1x9

CAAD Optimo - 2017-2019

resulting in twice the surface area for increased traction and grip

Step-riveted pins for strong side plate retention

Specialized Integrated Headset Complete, 1-1/8 Upper, 1 3/8" Lower MIPS Drop-Stop chainrings are designed forDescription Complete integrated headset with 1 1 8" upper bearing and a 1 3 8" lower bearing. 1 1 8" Upper Bearing: 41. 8mm OD x 30. 5mm ID x 8mm Thick (45x45 degree). 1 3 8" Lower Bearing: 49mm OD x 37mm ID x 7mm Thick (45x45 degree). 7mm tall split compression ring. 48mm OD 8. 5mm tall carbon transition cover. 5mm carbon headset spacer (2 pcs). 10mm carbon headset spacer (1 pcs). Part Number # S122500005