The best site for wheel size

tintin40

tintin40

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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
 
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.
 
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.
 
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.
 
mdvineng":r9yeetk6 said:
the vdo unit I have just requires the tyre size ISO number
Click to expand...


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