Don't know how to find bicycle wheel value for a speedometer?

F

First

New member
I bought a speedometer for my bicycle and for the wheel value setup,
there's a chart for setup :

| Road Bike
| 20" 1596
| 22" 1759
| 24" 1916
| 26" 2073
| 27"/700c 2124

(if it's 20", I enter 1596 in the speedometer)

well, I looked at my bicycle tires&rims they are
700 x 28c
and when I measured the circumference by myself ,
it was 7ft long.
I don't know how to match them to the chart above.
How??
 
The numbers in the chart are in millimeters (almost all cycling computers use mm). 7 feet is equal to 2133.6 mm. So use 2133 or 2134 in your computer. It will be very accurate!
 
The circumference is in mm, 7 ft = 2134 mm which is the exact reading I use on my road bike. My tire is 700 X 25 mm but the side wall flex makes the tire smaller then what it measures. I have a mile marker in my front yard and 2134 gets me with in 20 feet of the next marker.

http://www.sheldonbrown.com/cyclecomputer-calibration.html
 
Typically if it says "700 x ...." it is a 700 CC wheel and you should enter the last option of your list there. A 700 cc wheel is pretty standard these days for road bikes and most newer commuter/hybrid bikes.
 
Typically if it says "700 x ...." it is a 700 CC wheel and you should enter the last option of your list there. A 700 cc wheel is pretty standard these days for road bikes and most newer commuter/hybrid bikes.
 
Typically if it says "700 x ...." it is a 700 CC wheel and you should enter the last option of your list there. A 700 cc wheel is pretty standard these days for road bikes and most newer commuter/hybrid bikes.
 
The circumference is in mm, 7 ft = 2134 mm which is the exact reading I use on my road bike. My tire is 700 X 25 mm but the side wall flex makes the tire smaller then what it measures. I have a mile marker in my front yard and 2134 gets me with in 20 feet of the next marker.

http://www.sheldonbrown.com/cyclecomputer-calibration.html
 
The circumference is in mm, 7 ft = 2134 mm which is the exact reading I use on my road bike. My tire is 700 X 25 mm but the side wall flex makes the tire smaller then what it measures. I have a mile marker in my front yard and 2134 gets me with in 20 feet of the next marker.

http://www.sheldonbrown.com/cyclecomputer-calibration.html
 
The numbers in the chart are in millimeters (almost all cycling computers use mm). 7 feet is equal to 2133.6 mm. So use 2133 or 2134 in your computer. It will be very accurate!
 
The numbers in the chart are in millimeters (almost all cycling computers use mm). 7 feet is equal to 2133.6 mm. So use 2133 or 2134 in your computer. It will be very accurate!
 
The numbers in the chart are in millimeters (almost all cycling computers use mm). 7 feet is equal to 2133.6 mm. So use 2133 or 2134 in your computer. It will be very accurate!
 
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