Well, it's not the lightest thing, but comparing that to the 50 year old tires I got on the new Sports, it's about half as heavy, and are comparable to the 20-30 year old tires I get on most of my 590's. being a 40 lb bike, weight isn't too much of a concern, but it's not terrible.

For comparison, similarly treaded Kendas on my 700X38 bike make the thing feel like riding through molasses. I lose an average of 3-4 mph going from lighter 32's to the 38's.