The Bontrager Pro Blendr Stem is a lightweight aluminium stem ideal for road & hybrid bike use. The forged alloy construction of the Bontrager Pro Blendr Stem delivers stiffness without compromising its light weight or sleek looks. The Bontrager Pro stem is specifically designed for the easy integration of lights, a computer, & more with the Blendr integration system. Features Pro-level quality 31.8mm clamp diameter stem weighs less than many carbon stems 4-bolt dual band clamp securely holds handlebar Uses high-quality M5 corrosion-resistant faceplate bolts with 5.2 Nm torque spec Included Blendr Pro base & Blendr XXX accessory mounts make it easy to integrate accessories Mounts intended for use with Ion & Trip, Garmin, Go Pro & SRM accessories Approved for carbon bars & steerer tubes Safe installation requires 5mm spacer above & below stem Included Blendr accessories: Pro Mono Base, Trip Computer mount, & High Ion Light mount