Was testing 40cm bars vs 44 and surprised to find the 44s ' faster'
Looking at the weather data,the temperature went up by 2--3degC,and the solar radiation doubled (from ~50w/m2 to ~100) during the time I was on the road.
I set off from the house, so tyres were 'warm' then presumably cooled outside, then I switched the bars (inside the house),and went back out.
I didn't do ABA ,so am unsure if this is a real difference,and wonder if anyone has experience of w/m2 affecting crr?
( I compensated for ambient temp change)
Interestingly the garmin recorded a swing of ~9 deg C over the time I was out,compared to 2 deg from the weather station.