I'm 6'6" 230# riding a GF Sugar 2+ XL. I have noticed that my knees are bothering me after long rides with steep climbs. I figured it was due to the slight impact you may get from mt biking. However, since the birth of my son in January, I have been running 2-3 times a week, as I do not have as much time to ride as I used to (only ride 1/week or 1 every 2 weeks). Granted, I only run for about a half an hour whereas I usually ride 2 hours +, but it seems odd to me that I do not experience any knee pain running or after running, but I do feel it after a ride. Maybe it is just the infrequency of my riding. Anyone else experience this or have suggestions on how I may need to change my riding geometry?