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.

Quoted message said:

I have a Cateye TOMO XC computer and the calibration is
out by 10%

every

Quoted message said:

10km reads 11km. I have 26 x 1.25 tires and the wheel
size on the

comuter

Quoted message said:

reads 218 should I increase this number or decrease?

Decrease (to 198 if my calculations are correct). Better
measure the circumference, see:
sheldonbrown.comcyclecomputer calibration.htmlOpen ↗

"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

Quoted message said:

10km reads 11km. I have 26 x 1.25 tires and the wheel
size on the

comuter

Quoted message said:

reads 218 should I increase this number or decrease?

Thanx in advance.

"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