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#1
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700 x 23c circumference
I recently came into possession of a low end Bell cycle computer but didn't
get the documentation. Can anyone confirm the figure I have of 2096mm for the circumference of a 700x23c? |
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#2
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700 x 23c circumference
Brad Hubbard Wrote: I recently came into possession of a low end Bell cycle computer but didn't get the documentation. Can anyone confirm the figure I have of 2096mm for the circumference of a 700x23c? If you have a low-end wheel to go with the low-end computer, as well as a tape measure, you could measure the roll-out yourself. OR You could satisfy your curiosity by looking at http://www.sheldonbrown.com/cyclecom...libration.html and find that 2097 is the corresponding number in the table. Ritch -- ritcho |
#3
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700 x 23c circumference
ritcho wrote:
Brad Hubbard Wrote: I recently came into possession of a low end Bell cycle computer but didn't get the documentation. Can anyone confirm the figure I have of 2096mm for the circumference of a 700x23c? If you have a low-end wheel to go with the low-end computer, as well as a tape measure, you could measure the roll-out yourself. Sarcasm? I didn't measure it because I was not confident of measuring it accurately. Why don't you measure your own low-end wheel and see if you get 2097mm exactly? Brad |
#4
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700 x 23c circumference
Best way to measure is to place the wheel on the ground with the air valve right at the bottom of the wheel. Mark the starting point on the gound. Move your bike forward until the wheel has done a complete revolution and the valve is at the bottom again. Mark that point, then measure the distance between both points. -- jazmo |
#5
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700 x 23c circumference
jazmo Wrote: Best way to measure is to place the wheel on the ground with the air valve right at the bottom of the wheel. Mark the starting point on the gound. Move your bike forward until the wheel has done a complete revolution and the valve is at the bottom again. Mark that point, then measure the distance between both points. I think Sheldon also suggested sitting on the bike while someone pushes you along a very straight path and measuring as per jazmo's details.. This gives you the tyre deformation differential (ooh big words.. ) Just set it rough - it's still gonna be more accurate than a car. hippy -- hippy |
#6
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700 x 23c circumference
hippy Wrote: I think Sheldon also suggested sitting on the bike while someone pushes you along a very straight path and measuring as per jazmo's details.. This gives you the tyre deformation differential (ooh big words.. ) Just set it rough - it's still gonna be more accurate than a car. hippy Interesting point (i.e having someone sit on the bike). -- jazmo |
#7
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700 x 23c circumference
"jazmo" wrote in message ... Best way to measure is to place the wheel on the ground with the air valve right at the bottom of the wheel. Mark the starting point on the gound. Move your bike forward until the wheel has done a complete revolution and the valve is at the bottom again. Mark that point, then measure the distance between both points. -- jazmo How about you do the same thing but sit on the bike and do it over 10 or 20 revolutions so that you get a more accurate measurement. Marty |
#8
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700 x 23c circumference
Marty Wallace Wrote: "jazmo" wrote in message ... Best way to measure is to place the wheel on the ground with the air valve right at the bottom of the wheel. Mark the starting point on the gound. Move your bike forward until the wheel has done a complete revolution and the valve is at the bottom again. Mark that point, then measure the distance between both points. -- jazmo How about you do the same thing but sit on the bike and do it over 10 or 20 revolutions so that you get a more accurate measurement. Marty good thinking. might try that one. -- flyingdutch |
#9
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700 x 23c circumference
Brad Hubbard Wrote: ritcho wrote: Brad Hubbard Wrote: I recently came into possession of a low end Bell cycle computer but didn't get the documentation. Can anyone confirm the figure I have of 2096mm for the circumference of a 700x23c? If you have a low-end wheel to go with the low-end computer, as well as a tape measure, you could measure the roll-out yourself. Sarcasm? I didn't measure it because I was not confident of measuring it accurately. Why don't you measure your own low-end wheel and see if you get 2097mm exactly? Brad Not sarcasm, just being silly - sorry if I caused offence. I think 2096/7 is close enough... Ritch -- ritcho |
#10
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700 x 23c circumference
ritcho wrote:
Not sarcasm, just being silly - sorry if I caused offence. Sorry if I over-reacted. I think 2096/7 is close enough... Thanks, Brad |
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