Sigma PC 10.11 Heart Rate Monitor - Purple Colour_Silver If you need to replace

If you need to replace a 12t sprocket on your Titanium Cassette or Aluminium Cassette

Shell x diameter: 73 x 42 mm

Paired with the high output pyro rear light for 300 degree rear visibility

Hole: 36 hole

37 x 24 - OC13-CEG

Sigma PC 10.11 Heart Rate Monitor - Purple Colour_Silver If you need to replaceSigma PC 10. 11 Heart Rate Monitor Purple The Sigma PC 10. 11 heart rate monitor purple features a streamlined design, large display and three operating buttons. Complete with a calorie counter, programmable training zone and zone alarm, this easy to use heart rate monitor will turn heads in the gym and enable heart rate based fitness training. Features: ECG accurate Training manager for exercise evaluation and monitoring Average heart rate Calorie