Dumb Bike computer question

Rob Z said:

I have a Cateye TOMO XC computer and the calibration is out by 10% every
10km reads 11km. I have 26 x 1.25 tires and the wheel size on the comuter
reads 218 should I increase this number or decrease?

Decrease. Try 218*10/11=198.

"Rob Z" <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

I have a Cateye TOMO XC computer and the calibration is out by 10% every
10km reads 11km. I have 26 x 1.25 tires and the wheel size on the comuter
reads 218 should I increase this number or decrease?

Thanx in advance.

It is assuming you wheel diameter is 27.3 inches. If your wheels are
smaller than this the number should go down. The computer is
overestimating the linear distance travelled with each wheel rotation.
Number should decrease.

Janet K.

Rob Z said:

I have a Cateye TOMO XC computer and the calibration is out by 10% every
10km reads 11km. I have 26 x 1.25 tires and the wheel size on the comuter
reads 218 should I increase this number or decrease?

Ride through a spot of paint on a sidewalk. Measure between
paint spots and enter that number directly , no decimal
point ( 2.072 meters = 207, 2072 on some models)

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

A Muzi said:

Rob Z said:

I have a Cateye TOMO XC computer and the calibration is out by 10% every
10km reads 11km. I have 26 x 1.25 tires and the wheel size on the comuter
reads 218 should I increase this number or decrease?

Ride through a spot of paint on a sidewalk. Measure between paint spots
and enter that number directly , no decimal point ( 2.072 meters = 207,
2072 on some models)

And if one does not have paint readily available, ketchup or mustard
will work.

--
Tom Sherman – Quad Cities