Cannondale Synapse Carbon 1 1/4’’ Tapered Headset No Crown Race K35028The Cannondale Synapse Carbon 1 1/4’’ Tapered Headset No Crown Race K35028 is a perfect replacement for Cannondale headset for 2018 generation Synapse carbon frames. This headset fits frame sizes 51cm and 54cm. Use kit K35018 for 44 and 48cm frames.Use kit K35038 for 56, 58, and 61cm frames. Kit includes Carbon conical spacer, Flat alloy top plate, Upper bearing wedge, 1 1/8" upper bearing, 1 1/4" lower bearing, and the Crown race not included as it is integrated into the fork. Previous models KP203 and KP155 have been discontinued. Will fit first and second generation Cannondale EVO and many Synapse Carbon frames that used 1 1/8" upper and 1 1/4" lower bearings. Please call Cannondale for compatibility questions.884603694565