Developed from the ground up for a wide range of tapered and oversized headtubes, the InSet 5 headset combines maximal durability, silky-smoothness and unrivalled longevity with a phenomenal service life. Handcrafted in the USA, this is the go-to headset if you’re running zero stack, mixed zero stack or an external cup set up.   Features Engineered, manufactured and assembled in Portland, Oregon USA. 10-year built-to-last warranty. Legendary made-in-house bearings. Patented GripLock® retention design for exclusively dependable headset adjustment. Responsibly lightweight. Designed specifically for a 49mm straight headtube and a 1-1/8" to 1.5" tapered steerer tube. SHIS ZS49/EC49.