Pro Tharsis XC Stem The Tharsis XC stem is the next evolution of headset design. Featuring a unique pinch bolt design with a headset preload ring the Tharsis XC allows the headset to be adjusted without the need for a top cap leaving the fork steerer tube free to take an internal Di 2 battery or simply as a method to save weight
Features: Unique pinch bolt design with headset preload ring enable the headset to be adjusted without the need for a top cap or star nut leaving the fork steerer tube free to take an internal Di 2 battery or simply as a method to save weight over a traditional system The stem has been designed to take an SM-JC41 Di 2 junction box internally & is machined to allow cables to enter the front of the stem under the handlebar clamp Extra wide bar clamp for additional stiffness Weight: 145g (100mm) Buy Pro Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.