The best site for wheel size

[tintin40]

Trying to set up my VDO cycle computer. The wheel size setting always gives me pain. Have i set the wheel setting wrong as it won't go above 9mph!!! it's not me before some one says. it's a wireless set up.
Thanks in advance

 

[mdvineng]

Assuming you are going faster than 9mph then yes it is set wrong! http://www.cycleparts.de/en/home.html
https://www.youtube.com/watch?v=z3KTgSnjDDM

 

[tintin40]

I've seen those vids. But i need a reliable site for the correct wheels size, As the one i've used is wrong. The speedo is about 5 mph slower that should be.

 

[hamster]

Many solve the kph / mph problem by a different wheel size number. As yours seems to be about 0.6 of what you expect, try multiplying by 1.62, which changes kph into mph.

 

[FluffyChicken]

Re:

Don't you just Put in the circumference like the good old fashioned things.
If so then measure it.

Put a mark, sit on it with your normal tyre pressure, go forward ten rotations, measure the distance and divide etc.

 

[tintin40]

at last sorted. Found this site http://berkshiresports.org/index.php?ID ... calculator

so now speedo showing correct.

 

[mdvineng]

the vdo unit I have just requires the tyre size ISO number

 

[The History Man]

How much does it weigh?

 

[tintin40]

the vdo unit I have just requires the tyre size ISO number

?? mine is a cheap version? Just happy that the speed is correct now. One day some one will make some thing better. Like auto adjust sensor? After all we been to the moon.

 

[mattr]

Have had auto adjust for at least 8 years. Both my garmins do it (one is 8 years old) so does my wifes!