Originally Posted by
BoraxKid
The rolling resistance is not really different enough that anyone with even a beginner's leg strength would be able to tell, but that doesn't stop people from claiming the tires are "slow". Some people are just silly and like to complain about the tiniest, most imperceptible things.
If we assume that the crr difference between a Gatorskin and a GP5000 in steel drum testing is comparable to the difference on an actual road, for an average bike+rider the Gatorskin is going to cost somewhere on the order of a mph when riding a flat road at 20mph. For a non-fit-related bicycle change, that's pretty huge.