Originally Posted by
_ForceD_
I have a question about brifter shifting function? Not simply mounting and adjusting the shifting. More like making internal adjustment to the shifting mechanism. All of my bikes are older with downtube index shifters. I have ridden enough rental bikes with STI, but I’ve never worked on them. I bought a used bike a couple weeks ago (older Specialized Allez). It has 2x9 speed with Shimano 105 “Flight Deck” brifters. Mostly, the shifting works. But the rear (Right side) shifter has a bit of an issue. When I push the shifting lever to the LEFT to upshift (to a smaller gear), the lever moves freely, but once it engages I have to push rather hard for the final “click” for the shift. Much harder than on other bikes I’ve used with STI. I’m wondering if there is an adjustment internally that can correct that. — Dan
No there isn’t internal adjustment for STI. I suspect you may have a cable issue, however. Shift down the lowest gear and upshift without pedaling. This will put a lot of slack in the cable which will allow you to remove the cable housing from the stops so that you can inspect the cable. Look for corrosion or for kinks in the inner cable. While you have the cable loose, spread a little bit of grease on the inner cable to help everything move more freely.