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Polar 720 - setting wheel size for my bike(6 posts)

Polar 720 - setting wheel size for my bikesodade
Apr 16, 2003 11:28 AM
The thing defaults at 2000 MM? This is for a road bike (Vittoria Open Corsa CX tires). I have seen road wheels measured only at 700 cc (cubic cm?).
re: Polar 720 - setting wheel size for my bikeovertrained
Apr 16, 2003 12:48 PM
The 2000mm default is for the circumferance of the wheel. Just mark the ground when the valve is at its lowest point, roll the bike forward one revolution of the wheel and mark the ground again. Mesure the distance between the 2 marks in mm.
2096mm is "standard" for 700x23--nmTrekFurthur
Apr 17, 2003 6:17 AM
hmmm - I rolled it and got 2120 - wrong? -nm-sodade
Apr 17, 2003 9:36 AM
You need to put all your weight on the bike while rolling. nmpurplepaul
Apr 17, 2003 9:52 AM
Not necessarilyTrekFurthur
Apr 17, 2003 10:51 AM
There are a lot of variables--tire pressure, amount of weight applied to the bike, etc.--but I just don't like to worry about it. As I said, the 2096 is a standard, and I'm usually spot on with most folks regarding distance and spead--at least close enough for gov'ment work!