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Wheel Circumference for 700x22c(5 posts)

Wheel Circumference for 700x22cbollard
Mar 14, 2003 11:10 AM
Got the new Continental Force/attack tires but noticed that the front is 700x22c rather than my normal 700x23c. I looked at my VDO computers instruction manual but they don't have a circumference for a 700x22c. Can anyone here help (need inches for MPH calculations) I would do the marking out thing but I never seem to get an accurate reading when I use that method.
re: Wheel Circumference for 700x22cMR_GRUMPY
Mar 14, 2003 11:18 AM
Just do a roll out measurement.
re: Wheel Circumference for 700x22cBeaver
Mar 14, 2003 12:30 PM
An easier way than doing the marking out test is to get a tape measure and start with the valve at 1". I take the front wheel off the bike, put some pressure on the skewer and roll it out along the tape measure, stop when the valve returns to the bottom and subtract 1". Probably not the most exact way to do it, but pretty damn close.

I mounted the same tires last night and did a roll out test. I think the Force rolled out to 82 or 83 inches. I don't remember exactly right now. I'll have to do it again this afternoon because I forgot to write it down.
let us know how those Conti Force/Attack tires areFez
Mar 14, 2003 2:08 PM
They look trick, and I wonder how much better than GP3000s they could be.

Unfortunately, you lose the ability to rotate front to back. And since tires tend to wear or puncture at different rates, WTF is up with selling these only in pairs? That makes replacing them pretty expensive - especially if you get 3 rear flats in a row.
Follow the ERTRO numbers...Alexx
Mar 15, 2003 2:35 PM
since the 22 refers to PROFILE HEIGH (not width, as is commonly thought), this is a very simple calculation to make.
Total Diam = Rim Diam + 2*22, or 622mm + (2*22)= 666 mm.