Originally Posted by thrilhou
thanks for all the sugestions, etc. To be more specific, I used to ride the stock set up on my bike, which was 170mm cranks 48x16 and never had the slightest problem. I then up-graded my cranks and wheelset: 165mm cranks 49x17, which technically should be a little easier going, but then the pain started, I did adjust the saddle hight which helped. Perhaps I'll just drop the gear ratio...
You need to adjust your position. Riding loger crank arms gave you more leverage like in road bikes. it handles bigger gears beter. Cold can be a factor ..getting cold in the knee can be bad if not taken care of correctly. Take it easy for your legs too adjust.
S/F,
CEYA!