Okay I’ve been as pessimistic as possible, changing and bbs have emailed me CdA values of 0.2586 for race and 0.4569 for climbing, this changed the predicted finish time by a few minutes…
I updated the course with one from this year’s race, which changed a few minutes too…
I’m still at a predicted time of 7h20 when I got 8h16.
If I can’t get the BBS model to predict a similar outcome for a real event, then I can’t see how it has value for me. But I know other people get very close outcome/simulation so something else must be wrong.
How does BBS distinguish between pedal power meters and crank or wheel?
Is it possible there is something wrong with the actual bike?
It was in okay but not pristine condition after a year on the trainer. Degreased, wiped down and reIubed.
I noticed a bit of chain rub in the lowest gear, so I didn’t use that gear on race day.
I thought there might be brake rub in the first 40k but I got similar power distance over the first and second thirds of the course.
I can’t think of anything that might cost an hour.