Cane Creek 40 IS41/28.6 / IS41/30 Short Cover Headset BlackCane Creek 40 Series. The 40 Series is the workhorse of Cane Creek's headset line up. Representing the balance of performance, durability and value, the series incorporates all the features necessary for a robust, lightweight, long lasting headset. Replaces Cane Creek IS 3 headset 41mm angular contact bearings feature 36degree inner chamfer, 45degree outer (36 45) Directly compatible with 41mm head tube and fits 42mm (Italian) head tube with supplied