If you don't want to do the rollout, Sheldon Brown also has a calibration chart on his site that you can use as a starting point: http://www.sheldonbrown.com/cyclecom...ation.html#ccc

Of course 700x29 is not included in the chart. That sounds like a very odd size. And wow - this is a first for me. I just did a search on google for
bicycle tire 700x29c
and came up with only 1 document. I've never done a search before that matched only one thing. (If you're interested, the document that matched was a catalog for mountain bike tires (or tyres, as they spelled it) from a company called Geax. Of course that doesn't help with your tire calibration, but I thought it was interesting).

--- Denise