Originally Posted by
Kapusta
How heavy the tire is is much less important that how well it rolls.
Well we are talking about climbing, so I guess that would depend on how steep, how fast, and how far we’re measuring. In any case, a 650b tire weighing nearly 700g is not constructed for low rolling resistance; it’s probably a coarse, stiff, low thread count casing with a lot of rubber making it it even less supple.