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FTP Ratings
These tables include classifications for functional threshold power (FTP) estimates by sex.
Males Watts per Kilogram (W/kg)
Superior 5.05 and greater
Excellent From 3.93 to 5.04
Good From 2.79 to 3.92
Fair From 2.23 to 2.78
Untrained Less than 2.23
Females Watts per Kilogram (W/kg)
Superior 4.30 and greater
Excellent From 3.33 to 4.29
Good From 2.36 to 3.32
Fair From 1.90 to 2.35
Untrained Less than 1.90
FTP ratings are based on research by Hunter Allen and Andrew Coggan, PhD, Training and Racing with a Power
Meter (Boulder, CO: VeloPress, 2010).
Wheel Size and Circumference
Your speed sensor automatically detects your wheel size. If necessary, you can manually enter your wheel
circumference in the speed sensor settings.
The tire size is marked on both sides of the tire. You can measure the circumference of your wheel or use one of
the calculators available on the internet.
Symbol Definitions
These symbols may appear on the device or accessory labels.
WEEE disposal and recycling symbol. The WEEE symbol is attached to the product in compliance with the
EU directive 2012/19/EU on Waste Electrical and Electronic Equipment (WEEE). It is intended to deter the
improper disposal of this product and to promote reuse and recycling.
140 Appendix
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