@edscoble - You're up to speed on this sort of stuff - for a (mostly) road touring bike, is the new Compass Rat Trap Pass tyre starting to get too big and bouncy? As a system, the extra-light casing and an ordinary ~400g 26" rim is lighter than, say, a VO Diagonale/Hetre combo in 650b, and probably as strong.
I'm going off the Pacenti SL23 as the 2015 version doesn't have a wide enough brake track for canti pads and the 2014 version seems to be prone to breaking around the spoke holes. Doesn't seem to be a lot of choice from there 'til you get to 550-600g rims.
@edscoble - You're up to speed on this sort of stuff - for a (mostly) road touring bike, is the new Compass Rat Trap Pass tyre starting to get too big and bouncy? As a system, the extra-light casing and an ordinary ~400g 26" rim is lighter than, say, a VO Diagonale/Hetre combo in 650b, and probably as strong.
I'm going off the Pacenti SL23 as the 2015 version doesn't have a wide enough brake track for canti pads and the 2014 version seems to be prone to breaking around the spoke holes. Doesn't seem to be a lot of choice from there 'til you get to 550-600g rims.