Giant Revolt 2 vs Giant Anyroad 2 drag/roll resistance I own two bikes:


Giant Revolt 2: http://www.giant-bicycles.com/uk-ua/bikes/model/revolt.2/17270/72372/#specifications
Giant Anyroad 2: http://www.giant-bicycles.com/uk-ua/bikes/model/anyroad.2/17256/72374/#specifications


Experimentally Revolt has a better roll than Anyroad. This really bugs me because:


Anyroad has a stiffer fork.
Anyroad tyre width 32, Revolt - 35.
Revolt weights slightly more.


I've perfectly adjusted cones for Anyroad, experimented with tyre pressure, switched riders.

The only thing I didn't change is the hubs. Revolt has Formula [F] DC20 [R] DC22, alloy disc hub, double-sealed, Loose Ball Bearing, 32H. Anyroad has sort of noname Giant, [F]24h, [R]28h.

Does anyone know anything about this mysterious Giant hub? Could it be a culprit as the Formula hub gives better roll?
Are there any other suggestions how to make Anyroad roll better?
If you're measuring on downhills, the Revolt will roll better because it weighs more, not despite it. While objects of different mass will free-fall at the same rate (all else being equal), the mechanics of coasting are different due to the effect of air resistance. A great explanation is available here.

There are better ways than roll to measure a bike's efficiency--like given the same energy input, same speed, and same wind profile (for the rider at least), which one goes farther on a flat surface? Or, given the same energy expenditure and the same flat distance, which one arrives first?

If you're concerned with efficiency, hunching over a bit more for aerodynamics will have much more of an effect than minor differences in rolling resistance, or slight differences in the weight of the bike.