Originally Posted by
GhostRider62
My guess is something between 80-100 is a good CTL. Interested if anyone has similar guesses?
This is consistent with my experience. I use the tri-score in GC because I run over the winter and only have a PM on one bike, so I have to rely on HR for most of my workouts. If I can keep my CTL (tri-score) in the 50's going into the spring riding season, I can get it up to high double digits by May or June without too much trouble, so I'm in good shape for a GR in July or August which will pull me up into the low triple digits before the slow decline back down to the 50's over the fall and winter.