There are a range of factors that can affect your cycling speed. Obviously fitness is one of them, however, weather conditions and the varying gradients of the road play a huge part too. When these elements come together, that’s when the advanced and aerodynamic S-series speed sensor is essential.

• Measures your current, average and maximum speeds
• Track your average speed to see your progress and performance improve
• Light yet tough, and easy to attach

• S725X
• S-625X