Originally Posted by
cplager
It's not the tire weight that makes it so slow. It's the tire composition that causes rolling resistance. If someone could make a heavy tire that was puncture resistant but had low rolling resistance, that would be the holy grail of commuting/touring tires.
Um a big hunk o heavy, on the on the outside of the rims is gonna be a big hung o heavy in the worst possible spot for rotating weight. So yeah, the weight will make it slower. Plus it may ride crummier than the average tire.