Anyone got any info on this? Wondering how much of the power variation on a wheel on trainer is down to the trainer warming up and how much is down to the tyre?
A secondary question is has anyone found a trainer tyre to be any more stable / seen less power variation hot to cold?
For reference I use a Schwalbe Pro One @ 100 psi on a Tacx Genius. I have rarely seen much difference in calibration tightness between cold and after 10 mins use when Tacx suggest you should calibrate.
Why I ask today? Here it is 7 degrees / 45f and I for the first time ever it asked me to add tension after a 10 min warm up. I was also using a second power source for the first time, it showed some drift between sources both from cold to 10 mins when I calibrated but then again from 10 mins up to about 15. This was 20 watts at cold, 15 watts after warm calibration then about 20 watts after a further 5 mins - all probably within the tolerances you should expect from a wheel on trainer but something I’d be interested in avoiding if possible.