I recently bought a new carbon wheelset and did a free spin test on the front wheel compared to the front stock wheel from my 2016 Trek Domane. The old front wheel free spun for almost 2mins, the new front wheel spun for less than 20 seconds. I checked the brakes several times to make sure there was no interference. There just seems to be a ton of resistance/viscosity in these new hubs.

I realize that all the comments here disagree, but this rolling resistance must add up over time. I can genuinely feel a difference in resistance when spinning the wheel slowly by hand.

Could this all come down to extremely heavy grease being used in the hub? Any other thoughts?