E3 Cycling F11C User Manual

Battery Installation

To help you get started quickly, the computer battery has been installed at the factory. Under 

normal usage a battery should last approximately one year. The F11C uses a 3V CR2032 

button cell battery, which is available at most camera and electronic shops.

NOTE: Most problems that occur with cyclocomputers are caused by a dead or weak battery. 

Should you need to replace the battery, follow the steps below.

1.  Remove the battery cap from the bottom of the computer using a small coin. See Figure 1.

2.  Install the battery in the battery compartment with the positive (+) side facing the battery cap.

3.  Reinstall the battery cap and tighten securely. NOTE: During a battery change, all data will be cleared from memory. Make a note of your 

current wheel size setting and cumulative odometer mileage before replacing the battery so you can reprogram these values once the new 

battery is installed (see “Program Wheel Size” and “Set the Odometer”).

4.  If for some reason the screen is blank or shows an irregular display after a battery change, press the reset button on the underside of the 

computer head. See Figure 6.

Determine Wheel Size

The F11C uses wheel circumference (measured in millimeters) to calculate speed and distance. Before you can program the F11C you must 

calculate wheel circumference using one of the three methods below.

1.  Select size from chart (least accurate): Use the chart to fi nd the circumference for your tire size. The chart lists the programming sizes for some 

of the most popular tire sizes currently in use. These numbers are estimations which may not precisely match the circumference of your wheel, 

due to variations in tire size between brands and models.

2.  Measure wheel diameter (more accurate): Measure your wheel diameter (including wheel and tire) in millimeters (1 inch = 25.4mm) and 

multiply by 3.1416. This value is your wheel circumference.

F 1 1 C   C y c l e   C o m p u t e r

c

25

c

25

Thank you for your purchase of an E3™ cycle computer. With all the features that a professional rider needs to keep track of a 

ride, the F11C is the perfect accessory for any cyclist. The cadence function makes the F11C an excellent choice for improving road 

training as well. 

1

Computer Functions

CURRENT SPEED (m/h or km/h)

Displays current speed, up to 105mph (168km/h). Accurate to 0.1m/h 

or km/h. Always displayed at the top of the screen.

SPEED DISPLAY BAR

Provides a graphic display of current speed. Additional segments 

of bar illuminate as current speed increases.

CLOCK (TIME)

Displays time of day in a 12 hour or 24 hour format.

AUTOMATIC RIDE TIMER (ATM)

Auto start/stop timer is activated by front wheel movement and 

records actual ride time up to 9:59:59.

TRIP DISTANCE (DST)

Displays distance traveled during current ride (or since last reset), 

up to 999.9 mi. or km.

ODOMETER (ODO)

Displays cumulative ride distance, up to 99,999 mi. or km.

SPEED COMPARISON (56)

Compares current speed to average speed. As you ride, a (5) or (6) 

will appear next to current speed to indicate whether 

your current speed is above (5) or below (6) your average speed. 

This function is automatic, requires no programming and 

cannot be disabled.

AVERAGE SPEED (AVG)

Calculates average speed based on ride time (ATM) & trip distance (DST).

MAXIMUM SPEED (MAX)

Displays highest speed attained during a ride (or since last reset), up to 

105m/h (168km/h).

STOPWATCH (STP)

Manual stopwatch allows you to time any portion of a ride, up to 9:59:59.

CADENCE (C)

Displays crank revolutions per minute (RPM) from 30 to 240.

DUAL WHEEL SIZE SETTINGS

Wheel circumference is used to calculate speed and distance. The F11C 

includes two wheel size settings ( 

1

  and  

2

 ), allowing you to switch your 

computer between two bikes with diff erent wheel sizes (e.g. your road 

bike and mountain bike).

AUTO SLEEP

To prolong battery life, the F11C will automatically enter “sleep” mode 

after 5 minutes of non-use. The computer will automatically restart as 

soon as it receives input from the speed sensor, or when any button is 

pressed. 

SCAN MODE

Allows hands free viewing of all display screens except Cadence. When 

scan mode is activated, the computer will scroll through all display 

screens (except Cadence) on a continuous loop, displaying each screen 

for two seconds. To activate scan mode, press and hold the LEFT button 

for three seconds in any display screen except Cadence. To exit scan 

mode, press the LEFT or RIGHT button in any display screen.