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6 comments
I used to get the same issue; found it was due to the saddle being too high. In the pictures your foot position is quite "toe down"; you might well find that when you're riding hard you drop your heel, extending your leg and tweaking the muscle behind the knee.
Drop the saddle 5mm and see if it helps.
The fitter should put you on a turbo, will be able to confirm if you do indeed do the above, and will set saddle height accordingly.....bike fit is money well spent.
Follow the rules in this video as a start and then adjust one thing at at time, little by little. Starting with seat height and position on the rails, then look at cleat position. It takes a few adjustments but you'll get there.
http://www.youtube.com/watch?v=FAl_5e7bIHk
The plumb line from knee to cleat may help.
I've had a bike fit and they adjusted my saddle to be as low as yours with respect to leg straightening. I found after 50 miles, my knees were shagged (which was a bit of a problem as there were 40 more to go to get back to the car!). The pain was in both tendons at the back.
By raising my saddle by a little less than a centimeter and moving the cleats on my shoes closer to the toes, my knees have stopped hurting.
Now that worked for me, but everyone is different.
Your reach is too long.saddle height and cleat position is always hard to get right and pretty much trial and error.Eddy Merckx used to change saddle height all the time and still was quite successful
It probably won't affect your knee much but from the pictures it seems to me that the reach is slightly too long. I think you are right that a 56 would be better (I am same height as you) but shortening the stem will help in terms of general comfort - it might make steering a bit twitchy if too short though. Saddle height looks about right so I think it may be the cleat position.
As no-one has answered I'll put my 2p in. Pain at the back of the knee is often associated with the saddle being too high or cleats too far forward. A bike fit is definitely the the thing to do. I hope it sorts out your problem.