I bought a 2007 QRoo Seduza new in early April. It’s never really shifted right in the rear. Shifting into harder gears works fine. Shifting into easier gears requires applying pressure on the shifter past the stop point until it shifts, then letting go. This thing shifts much much worse than my Specialized Allez with 105 components.
It’s been back into the shop several times. I’ve stood there and watched them do all of the work, and I’m convinced it’s nothing that they’re doing. We’ve run new cables, replaced the deraileur and replaced the cassette along with tuning the deraileur and limit screws. No major changes.
On my last trip to the shop, we started by hooking up an Ultegra road bike shifter with about 6 inches of cable/cable housing. We did this to see if my shifters were bad. The thing shifted great. So we did the same procedure with my shifter…hooked it up on 6 inches of cable and ran it through the gears.
So I’m fairly confident the issue is the cable getting caught up somewhere inside the frame (probably around the bottom bracket) and causing extra friction. My plan was to pull the cable housing stops out of the frame entry/exit points and run housing the entire length of the cable.
Has anyone else had this issue? And is my idea of adding full housing going to work?
How much slack do you have on the housing as it exits the BB area before it goes back inside at the chain stay.
If you (or the shop) run it straight, you’re forcing a pretty sharp bend at the BB that may be causing your shifting issues. Try running the housing a bit longer to smooth that transition.
Just a guess, my 2007 Seduza shifts fine so I don’t believe it has much to do with the internal routing.
No, I’m fairly certain they didn’t check the alignment of the rear dropout.
Since it’s a carbon fiber bike it wouldn’t really be “bent,” right? To me the word bent implies damage was done to the bike. If the rear drop out wasn’t properly aligned, it’d more likely be a manufacturing defect where the frame was goofed up from the moment it left the mold, correct?
So is there an easy way to check the alignment that’s not just a visual check?
you are right, carbon fiber would not ‘bend’ per se.
but after they put on a new hanger, they could’ve used a park tool to check the alignment of the newly installed hanger on the dropout to check the complete alignment relative to a true and correctly installed wheel. if they did not do this, this is an oversight.
it is very difficult, if not impossible, to check this alignment by eye. the only time you can see it by eye and be sure it is the hanger and not the deraill., is when the misalignment is considerable.
but a little misalignment could cause shifting problems.
To check for a binding cable, remove the old cable run a new cable through the housing, bypassing the shifter. Don’t clamp it into the derailler. Pull it back and fort by hand. It should slide easily with no catching. If it does its not the housing. Could be what the other poster said and be a misaligned derailleur hanger (which should have been checked before buying/installing a replacement). One other possiblily is the wrong chain, make sure its a 10 speed chain if its a 10 speed rear, etc.