Sticking 105 upshift

tallgear54 said:

My 105 rear shifter pods are not upshifting (going from larger cog to smaller). They can be shifted but only while holding the longer downshift lever in place to the outside (hard to do while riding). I have ruled out the cables, they are all new with super clean ends. Very smooth movement and no friction on the cables. The right downshift lever travels a bit when the shorter up-shift lever is pressed. Kinda seems a bit sloppy. Does this mean the shifter spring is shot? Not all that many miles on these shifters and they were working a short while ago, when on a different bike, with the same derialleur.

I am not sure which version 105 you have but the bolt connecting the pivot may be too tight. That is unlikely though.

If it has been ridden in rain, the interior components may have corroded and siezed. I would suggest taking it to an LBS because that is a big problem.

bobbyOCR said:

I am not sure which version 105 you have but the bolt connecting the pivot may be too tight. That is unlikely though.

If it has been ridden in rain, the interior components may have corroded and siezed. I would suggest taking it to an LBS because that is a big problem.

Is the pivot bolt the allen that attaches it to the handlebar clamp? I don't think it is corrosion, not that old or that much rain. I will probably try the LBS.