Originally Posted by
gearhead82
I'm not sure how your sensor mounts, but this is how I mounted my garmin sensor with a similar cable setup.
Having looked at images of the 2008 Portland, the rear disc isn't a full length outer cable routeing, like the Vaya in your photo shows. The Portland has an exposed inner at the point where your GSC 10 is mounted, so would clamp the inner cable if mounted there. See post
#3416 to see how the cable is routed on the 2008 Portland
http://www.bikeforums.net/commuting/...-pics-137.html