Fits bikes with 49mm upper and 56mm lower headtube like Pivot or Intense DH bikes. We created our InSet™ family of headsets by applying the legendary form and function of Chris King headsets to fit solutions for a wide variety of tapered and oversized headtubes and steerer tubes being utilized in modern bicycle design. The Chris King InSet™ 9 is equipped with our exclusive built-in-house bearings and our patented GripLock® system for precise fit and function. Engineered, manufactured and assembled in Portland, Oregon USA Lifetime warranty Legendary made-in-house bearings Patented GripLock® retention design for exclusively dependable headset adjustment Responsibly lightweight Comes ready for 11/8>1.5 Tapered forks, can take straight 11/8" steerer forks with addition of the Devolution Base Plate (CKPHS626).