Originally Posted by
gholt
So, I have had this happen with two different sets of brifters. one on a Tiagra and another on on a 105. It seems after the temp dips into the 30f or below, they do not shift down. I can shift up, but when I need to shift down, I have to keep shifting the lefer for about 10 - 15 minutes before the shifter wants to cooperate. Any suggestions, as to why this would be the cases. I add a spray lube every so often so they have plenty of lubrication.
I've ridden in temps well below 0 F and never had this problem. I have had cables freeze near the derailleurs and it tends to happen when temps dip below freezing after riding in slushy/wet weather. They loosen up after a bit. Make sure you're lubing the cables.