I have just replaced the inner wire and housing for my front derailleur. When I tried it out today, I found that it was extremely difficult to downshift from the big to the small chain ring (this is a double). It was able to downshift but it just took a lot of pressure on the thumb lever to do it. What could be the cause of this?
2007 Specialized Allez Double
Sora front/Tiagra rear
SRAM chain/Shimano cassette 9 speed - both replaced very recently.
I've been using Zinn, the Park Tool website and the Shimano docs on these components. I also had to adjust the high/low limit screws on this derailleur since I had set them way off to accommodate the old, frayed cable as a temporary fix. I believe I have set them up correctly.
Rear derailleur works fine. It's occasionally a bit noisy but I will get around to changing that cable/housing as well.
Interestingly, the bike seemed to be shifting properly yesterday, right after the replacement, when it was on the stand.
I've had this same problem before when the bike was nearly new. I just took it to a shop back then but I'd like to do my own maintenance now.