Ozz
03-07-2005, 04:52 PM
yeah, I know the formula....but I am looking for a number (in millimeters) to calibrate a bike computer.
What numbers do you all use for a 700 x 23 Conti GP 3000?
I am basically too lazy to lay a string on the floor and roll my bike along it. I am also too embarassed to ask my wife to help me while I sit on the bike so the wheel is properly loaded. Cuz as you all know, the circumference is less when you have a load on the wheel. Note: Special thanks to "keno" for helping me thru that particular math problem.
I am sure there are some very anal people on this forum who have measured their 700 x 23 tires circumference to 0.5mm with a 180 lb rider on the saddle. These are the people who have the number I seek.
I currently use 2145mm 'cuz that is the number that came in a manual I had for an old computer. It seems to work pretty well, as I get the same reading as the radar operated "please slow down" speed indicators that seem to be all over my neighborhood. How close am I?
Thanks for your help.
What numbers do you all use for a 700 x 23 Conti GP 3000?
I am basically too lazy to lay a string on the floor and roll my bike along it. I am also too embarassed to ask my wife to help me while I sit on the bike so the wheel is properly loaded. Cuz as you all know, the circumference is less when you have a load on the wheel. Note: Special thanks to "keno" for helping me thru that particular math problem.
I am sure there are some very anal people on this forum who have measured their 700 x 23 tires circumference to 0.5mm with a 180 lb rider on the saddle. These are the people who have the number I seek.
I currently use 2145mm 'cuz that is the number that came in a manual I had for an old computer. It seems to work pretty well, as I get the same reading as the radar operated "please slow down" speed indicators that seem to be all over my neighborhood. How close am I?
Thanks for your help.