knee pain specific to the 'bent?
Admittedly, it's been a while since I did any regular riding, about six weeks. Off and on I have had a bit of an issue with pain on the inner back side of my knee. Only while riding the 'bent, never on my DF.
I have paid as close attention as I can to attempt to achieve the same extension for my legs between the two bikes. I use the same crank length, with the only difference there being the pedals.
The issue presented about 8 miles into a 16 miler (I cut short) and feels a whole lot like an overuse injury...except that I haven't been riding. I am familiar with ITB pain, and front and back of knee issues from "seat height" but cannot seem to get a grip on this situation. Even when I was riding on a regular basis it was vary between the tendon across the back inside side of the knee and the joint itself, but only on the ligaments on the inside.
What should I be looking into, if anything, to help me get some comfort from this recurring issue?
Kneesavers or shorter crank might solve your problem
My wife and I had the same issue when we went to a recumbents. On my bike, (Barcroft Virginia Ti) the bottom bracket is fairly low. The "fix" for me was fairly simple...I added a pair of "Kneesavers" which are essentially spacers that go between the pedals and the crankarms. They increase the distance between your feet and increase your Q-factor.
My wife rides a bike that has a much higher bottom bracket (Bachetta Corsa). Knee savers helped her, but the real "fix" for her was to switch from a 170mm crank to a 155mm crank. My bike came with a 155mm crank. Turning your feet in a big circle can be a strain, especially if your crank is above your butt. For us, we both now have TA Carmina 155 cranks and kneesavers. These cranks are not cheap and a lower cost solution is to have a crank shortened. Not all cranks can (or should be), shortened, but Mark at Bikesmith Design can likely help. Crank Arm Shortening