TREK KNOCK BLOCK 58-DEGREE HEADSET ASSEMBLY WITH DISPLAY CHI Size:Crown Race ID = 39.8 mm / Steerer OD = 28.6 mm (1-1/8") / Stack Height = 8.7 mm providing you with a convenient

providing you with a convenient spot to stow tools and gear without adding unnecessary bulk

So whether you're hitting the trails or stopping for a coffee break

perfect for multi-day

anti-slip tread makes it suitable for both the velodrome shower room and a shrubby woodland campsite

This means that your climbing workouts and virtual courses will feel more true-to-life than ever before

TREK KNOCK BLOCK 58-DEGREE HEADSET ASSEMBLY WITH DISPLAY CHI Size:Crown Race ID = 39.8 mm / Steerer OD = 28.6 mm (1-1/8") / Stack Height = 8.7 mm providing you with a convenientService and replacement parts specifically for Trek Knock Block technology.