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Just like hot water. A clean glass of water can be over the boiling point and yet show no sing of boiling. Dip something in - spoon or suchlike and the water is likely to explode out of the glass. Something to do with the inner surface of the glass being too smooth/clean for any bubbles to form on. you then put something into the water where bubbles can for and the water reactr so quick it jumps out of the glass. People have had to go to hospital with burns to arms/face after putting tea/coffee in the microwave to reheat.
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What I meant was that using a smaller tyre would soak up less discrepancies in a surface therefore increasing the rolling resistance.
Running larger/smaller tyres on a perfectly smooth surface would make no difference if the tyres were at the usual pressure (8/9bar) as there wouldn't be much tyre deformation causing more resistance.
I don't have any articles as I'm not that interested in the subject really. I've always used 18/19mm tubs on very smooth tracks as I could pump them up to about 16bar. For most outdoor tracks I used 23mm tubs as they were the most easily available for a decent price.
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Not sure on the gear ratio as I've never bothered to work out my road gears. I just know that over 50mi I regularly averaged 19mph with an average cadence of 110rpm. I have no garmin and rely on a non wireless cateye computer, which is pretty accurate.
46:18 is 67.2" A bit small for flat area riding
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We used to sandblast the bottom of our glasses. It's only a problem with lagers anyway. Proper drink doesn't have a head