440mm

Friendly Reminder: 1,Our handlebar fork diameter is 28.6mm. If your bike's fork outside diameter is more than 28.6mm, we recommend you not to order. 2,Install the product correctly, please follow the specified tightening torque (4Nm) 3,Tighten the screws. Since it is made of carbon, we recommend tightening the body to support it by tightening with your hands. Cracks can occur when strong tensions occur 4,Can be installed Speedometer/Stopwatch holder Carbon Fiber compares to Aluminum Alloy: Lighter in weight. Much more beautiful in appearance. Brighter in Color. Stronger in pressure resistance. Anti-Shock. Has proper elasticity, improving your bicycle's class in minutes.