Bontrager's Elite Stem is all about solid performance and seamless integration. Thanks to its one-piece, cold-forged 6061-T6 aluminum construction, it's strong, light and stiff. The 4-bolt faceplate is ultra tough and evenly distributes clamping forces, so it's safe, secure and compatible with both carbon steerers and bars. The real beauty of this stem is the Blendr integration. It works with Bontrager's Trip computers, Ion lights and their iPhone 5 case without the need for extra mounts on your bars.