The Origin8 Stem Bicycle Quill to Threadless Adapter in black is a versatile component suitable for universal bike types, with a focus on hybrid and comfort bikes. Made of lightweight aluminum, this quill stem adapter features a 1 1/8 inch steerer tube diameter and a 22.2 mm clamp diameter. The durable and reliable Origin8 brand ensures quality for cycling enthusiasts looking to upgrade or repair their bike's headset. At just 0.38 lbs, this adapter is a convenient and practical addition to any bike, providing a smooth and efficient riding experience.