| Tire Size | Wheel Circumference (mm) |
| 20 × 1.75 | 1515 |
| 20 × 1-3/8 | 1615 |
| 22 × 1-3/8 | 1770 |
| 22 × 1-1/2 | 1785 |
| 24 × 1 | 1753 |
| 24 × 3/4 Tubular | 1785 |
| 24 × 1-1/8 | 1795 |
| 24 × 1.75 | 1890 |
| 24 × 1-1/4 | 1905 |
| 24 × 2.00 | 1925 |
| 24 × 2.125 | 1965 |
| 26 × 7/8 | 1920 |
| 26 × 1-1.0 | 1913 |
| 26 × 1 | 1952 |
| 26 × 1.25 | 1953 |
| 26 × 1-1/8 | 1970 |
| 26 × 1.40 | 2005 |
| 26 × 1.50 | 2010 |
| 26 × 1.75 | 2023 |
| 26 × 1.95 | 2050 |
| 26 × 2.00 | 2055 |
| 26 × 1-3/8 | 2068 |
| 26 × 2.10 | 2068 |
| 26 × 2.125 | 2070 |
| 26 × 2.35 | 2083 |
| 26 × 1-1/2 | 2100 |
| 26 × 3.00 | 2170 |
| 27 × 1 | 2145 |
| 27 × 1-1/8 | 2155 |
| 27 × 1-1/4 | 2161 |
| 27 × 1-3/8 | 2169 |
| 29 x 2.1 | 2288 |
| 29 x 2.2 | 2298 |
| 29 x 2.3 | 2326 |
| 650 x 20C | 1938 |
| 650 x 23C | 1944 |
| 650 × 35A | 2090 |
| 650 × 38B | 2105 |
| 650 × 38A | 2125 |
| 700 × 18C | 2070 |
| 700 × 19C | 2080 |
| 700 × 20C | 2086 |
| 700 × 23C | 2096 |
| 700 × 25C | 2105 |
| 700C Tubular | 2130 |
| 700 × 28C | 2136 |
| 700 × 30C | 2146 |
| 700 × 32C | 2155 |
| 700 × 35C | 2168 |
| 700 × 38C | 2180 |
| 700 × 40C | 2200 |
| 700 × 44C | 2235 |
| 700 × 45C | 2242 |
| 700 × 47C | 2268 |
Select your product to confirm this information applies to you
Setting the Bike Wheel Size on a Garmin Fitness Device
Your bike's wheel size is automatically calculated over time when a Speed Sensor 2 or similar sensor is connected to a fitness device and used outdoors. In certain circumstances, such as when doing an indoor activity or when speed and distance readings are inaccurate, wheel size can be entered manually for improved accuracy on devices that allow this function. If you know your wheel size, select your device below and follow the steps to enter this measurement.
NOTE: Sensors have to be actively connected to the device to manually enter wheel size
The tire size is marked on both sides of the tire and can be used to determine the circumference of the wheel in millimeters (mm). This is not a comprehensive list. You can also measure the circumference of your wheel or use one of the many calculators available on the internet.
Select your model below for details:
If locked, unlock the screen.
Press the Run key (top right).
Navigate to Menu or select:
Forerunner 630: select
.
Select Settings.
Select Sensors and Accessories.
Select Speed sensor.
Select Wheel Size.
Select Manual.
Enter in Wheel Size in millimeters (mm).
Press Shortcut key (three dots on bottom left).
Press ENTER to unlock screen.
Press Shortcut key.
Select Settings.
Select Sensors and Accessories.
Select Spd/Cad or Spd.
Select Wheel Size.
Select Manual.
Enter in Wheel Size in millimeters (mm).
Press and hold the Up/Menu Key.
Access the settings option on the watch.
Select Sensors & Accessories.
Choose your previously paired speed sensor.
Select Wheel Size.
Select Manual.
Enter in Wheel Size in millimeters (mm).
Edge 130 Series, 520 Series, 530, 540 Series, 820, 830, 840 Series, 1000, 1030 Series, 1040 Series, 1050 and Explore Series
- Select Menu or .
Select Settings (some devices skip this step).
Select Sensors.
Select the previously paired speed sensor.
Select Sensor Details.
Select Wheel Size.
Select Manual.
Enter in wheel size in millimeters (mm).
The following instructions should work for most Garmin watches:
Press and hold MENU.
Select or scroll to Settings.
Select Sensors & Accessories.
Select Speed Sensor (Spd. -xxxxxxx).
Select Wheel Size.
Select Manual.
Enter Wheel Size in millimeters (mm).
Open the Garmin Connect app.
Access the menu by selecting More (bottom right).
Select Garmin Devices.
Select Speed Sensor 2.
Select General Settings.
Select Wheel Size.
Enter in Wheel Size in millimeters (mm).
For all other fitness devices, refer to your owner's manual.