Tire setting for Schwinn Speedometer

[Biker Dog]

I had to replace the battery in my Schwinn speedometer on my Club Cart.

The cart has 8.5" wheels/tires. Does anyone know the conversion number I use to program the speedometer?

Thank you in advance.

[folkh]

Google it, it should tell you what number to punch in.

[Biker Dog]

Google it, it should tell you what number to punch in.

I have tried Google with no results. Someone on here will have the answer.

[mulligan]

Could you try a number to get started and calibrate it with a GPS ? I was wondering myself how that could work.

[ajbrown]

The owners manual for your model speedometer "should be" online.

That said, if it is like my Bell speedometer you take the tire's diameter, convert it to millimeters then multiply times 3.1416

This will help with that conversion:

Inches to Millimeters - in to mm conversion (http://www.metric-conversions.org/length/inches-to-millimeters.htm)

I then use a GPS to verify.

[Biker Dog]

The owners manual for your model speedometer "should be" online.

That said, if it is like my Bell speedometer you take the tire's diameter, convert it to millimeters then multiply times 3.1416

This will help with that conversion:

Inches to Millimeters - in to mm conversion (http://www.metric-conversions.org/length/inches-to-millimeters.htm)

I then use a GPS to verify.

I am working numbers up & down to try and get a feel for the direction and when I get close I will match the speed with my GPS.

I just assume someone on here could save me some time.

[ajbrown]

I am working numbers up & down to try and get a feel for the direction and when I get close I will match the speed with my GPS.

I just assume someone on here could save me some time.

Not sure I understand, are you saying it does not work? Here is an example: If you have 8 inch wheels, I suspect your tires are 18 - 18.5 inches in diameter. It should say on the tire or you can measure a tire where the magnet is attached. Lets say tire is 18".

18 in -> 457.2 mm

457.2 * 3.1416 = 1436

Enter 1436 into the speedometer.

If tires are 18.5 then enter 1476 (469.9mm * 3.1416)

[Biker Dog]

Not sure I understand, are you saying it does not work? Here is an example: If you have 8 inch wheels, I suspect your tires are 18 - 18.5 inches in diameter. It should say on the tire or you can measure a tire where the magnet is attached. Lets say tire is 18".

18 in -> 457.2 mm

457.2 * 3.1416 = 1436

Enter 1436 into the speedometer.

If tires are 18.5 then enter 1476 (469.9mm * 3.1416)

Thanks. I am getting down toward those number, so I will try the 1476 setting when I get back later.

[LndLocked]

8.5 ...... huh???

the settings are based on wheel/tire diameter size. Try this:

K3PGP - Experimenters Corner - Schwinn 12 Function Bicycle Computer Manual (http://www.k3pgp.org/schwinnmanual.htm)

[Biker Dog]

Not sure I understand, are you saying it does not work? Here is an example: If you have 8 inch wheels, I suspect your tires are 18 - 18.5 inches in diameter. It should say on the tire or you can measure a tire where the magnet is attached. Lets say tire is 18".

18 in -> 457.2 mm

457.2 * 3.1416 = 1436

Enter 1436 into the speedometer.

If tires are 18.5 then enter 1476 (469.9mm * 3.1416)

That worked..It only reads 2 mph fast than the actual gps speed.

[zcaveman]

I have my Schwinn chart. Can you give me the diameter of an 8 1/2 inch wheel? I can give you the number off of my chart.

Z

[ajbrown]

That worked..It only reads 2 mph fast than the actual gps speed.

Since you having fun (I think :)) you can play some more or try to get the real diameter of the wheel. Playing is easy...

At the risk of stating the obvious....

If the number you have in the speedometer is 1476, that means the cart travels 1476 mm when the wheel rotates one time. If your speedometer is reading higher than your real speed, it means the cart is NOT REALLY travelling that far for each rotation.

Reduce that number to say 1400 and check, repeat until you have it nailed.

Another showery day, lucky I golf tomorrow ....