Originally Posted by
dogmahifi
speed increased at same watts (during the first ride at my usual segments, achieved over 100 personal records on Strava), super smooth pedaling, great feeling, would never go back. My bike has ITA bb so replacement was very easy and swift.
Um, my standard Shimano bottom bracket has to be way less than 1w of drag. My pedals have as much drag as the bottom bracket.
I happened to have the chain off today, so I did a quick check. These bearings have been in there for a few years already. Just a very light pressure with one finger is enough to turn the crankset. A 20 gram AA battery set onto the pedal end of the crank is also enough to turn it. A fast spin goes three or four revolutions -- actually, I expected to see 6-10 revolutions, but even this amount of drag isn't a factor when riding.
If you had the extra watts from "very light pressure with one finger" added to your riding pedal stroke, it wouldn't be measurable.