Bell F20 Speedometer F20 Folheto

Bell Wireless Speedometer

™

 Make sure to write down the Odometer value 

before changing the battery so you can later re-enter it in 
the odometer. Install the new battery with the positive (+) 
pole facing outward 

(Figure 1). After changing the battery 

all settings are erased. 
Clamp the magnet to a spoke on the right side of the front 
wheel 

(Figure 2). Make sure that the magnet is facing the 

outside of the wheel so that the flat side of the magnet 
passes in front of the sensor. 
Attach the speedometer sensor to the right fork leg using 
the two cable ties provided. Make sure the metal side of 
the sensor is facing the wheel. Do not fully secure the 
cable ties yet, as the sensor location might require further 
adjustments 

(Figure 3).

Adjust the sensor and magnet location so that clearance 
between the two is no greater than 1/5" (5mm) 

4). Magnet should pass by the tip of the sensor.
Remove the adhesive tape shield on the back of the 
bracket and position the bracket on the handlebar of the 
bicycle. Fasten the O-ring around the top edge of the 
bracket and wrap around the underside of the handlebar 
and attach to the bottom edge of the bracket. Insert the 
computer into the mounting bracket and twist to the  
right to lock into place.

Sensor

or

Magnet

5mm

Sensor

Magnet

Sensor

Bicycle fork

Sensor

or

Magnet

5mm

Sensor

Magnet

Sensor

Bicycle fork

Sensor

or

Magnet

5mm

Sensor

Magnet

Sensor

Bicycle fork

Sensor

or

Magnet

5mm

Sensor

Magnet

Sensor

Bicycle fork

Wheel Size Input  
The flashing number "2124" is the preset value. To de-
termine the correct wheel factor, refer to the table shown. 
Set the wheel factor by pressing the Right button until the 
correct setting appears. Press the Left button to lock in 
the correct digit. Repeat until all four digits are entered.

20" 

1596

22" 

1759

24" 

1916

26" 

2073

27"/ 700c  2124

24" 

1888

26" 

2045

27" 

2155

28" 

2237

Now that the speedometer is configured, insert the com-
puter into the bracket and twist to the right to lock in place. 
To check for proper installation, spin the front wheel. The 
speed tendency icon in the upper left corner of the screen 
should be turning as the computer starts recording data 
(Refer to Troubleshooting in case of problems).

Trip Distance (DST)  
0–999.9 Km or M
Trip Timer (TM)  
9 hrs 59 min 59 sec
Odometer (ODO)
Average Speed (AVS)
Maximum Speed (MXS)
Clock

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Current Speed (SPD) 
0–199.9 Km/hr or M/hr
Calories Burned (CAL) 
0–999.9 Calories Burned
Speed Comparison (+ or -)
Speed Tendency

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·

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·

Current Speed (SPD) 
Current Speed represents instantaneous speed. It 
is displayed on the upper screen. The speedometer 
measures speeds up to 200Km/hr or 125 M/hr. If no keys 
are touched and no movement sensed from the bicycle 
for five minutes, the speedometer will go into sleep mode. 
Press any key to reactivate. 
Calories Burned (CAL) 
Calories Burned is displayed on the upper screen. It rep-
resents the accumulated number of calories burned while 
riding. The calorie count on the screen will start over once 
999 calories have been burned. Calories Burned can be 
reset at any time by pressing and holding the Left button 
when "CAL" is displayed on the screen.
Speed Comparison (+ or -) 
"+" or "-" appears next to the current speed. This func-
tion shows the positive or negative acceleration of your 

Improper installation of this or any other bike computer 
can result in an accident. Read instructions carefully.
Call 1-800-456-BELL if you have any questions  
about installation.

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·

Check mounting hardware and transmitter installation 
before each ride for adjustment and secure fit.
This computer will not fit all bikes. If you cannot get a 
secure installation per the instruction manual, do not 
use this computer.

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·

Sensor

Mounting Bracket

Cable Ties (2)

Magnet

O-Rings (3)

Computer Battery 

(3.0V/CR2032)

Computer Unit

Km or Mile Selection 
After setting the Wheel Factor the Km/M selection will  
appear. Press the Right button to choose kilometer or 
mile. Press the Left button to confirm.
12 or 24 Hour Format Selection 
After the Km/M input selection, the clock format screen 
will appear. Press the Right button to choose between the 
two formats. Press the Left button to confirm.
KG or LB Selection 
After the hour format selection, the Kg/Lb selection 
will appear. Press the Right button to choose between 
Kilograms (Kg) or Pounds (Lb). Press the Left button to 
confirm choice.
Once the weight unit is selected, the computer will 
ask the user to enter his/her weight. This will allow the 
computer to accurately estimate the number of calories 
burned while riding.
To enter the correct weight, press the Right button until 
the correct digit appears. Press the Left button to lock in 
the correct digit. Repeat until all digits are entered.
NOTE: The weight entered should be between 80–499Lb 
or 35–199Kg. The speedometer is now ready to use.
Clock 
Set the time by pressing and holding the Right button 
until the hour is flashing. To set, press the Right button 
until desired setting is displayed. Press the Left button to 
confirm. Repeat steps for the minute setting.