STATE OF THE ART XR1.0 Carbon stems are designed with a low stack height and negative rise for those mountain bikers looking to lower their handlebar position. They employ an intelligent pairing of aluminum and carbon fiber to achieve the perfect balance of strength, stiffness and weight. The body is forged from an advanced 7050 aluminum before being reinforced with high modulus carbon fiber. The broad four-bolt face plate design better distributes stress and lowers the clamping force required to secure the handlebar. Material Carbon fiber UD Aluminium 7075 Weight 140gr 90mm length Angle 2� Length 60, 70, 80, 90, 100, and 110mm Clamp Diameter Oversized 31.8mm Steerer Diameter 1 1/8 28.6mm, Stack Height 37mm