Bought a new Cervelo P2C with full DA and I can’t shift up or down on the front derailleur. However, the derailleur seems to be working fine (if that makes sense).
I have brought to two different mechanics and talked to Cervelo and still the thing won’t shift. Have had the cables replaced twice, relubed, inserts inserted…nothing…Anybody else experience this?
What do you mean by “it won’t shift”. The front derrailleur has a rather simple mechanism: You pull on the cable and it pulls the derrailluer to pull the chain. Which part of that simple sequence does not work? You or your bike mechanics should be able to figure out in 30 seconds what is wrong with the system. In my opinion Cervelo does not even have to be involved.
Leave it in the big gear and get really strong?
Garbage it,
.
wait, no, give it to me
.
two different mechanics couldnt make it shift for you?? Why exactly did you walk away from either of them if they didnt fix your issue?
Bought a new Cervelo P2C with full DA and I can’t shift up or down on the front derailleur. However, the derailleur seems to be working fine (if that makes sense).
I have brought to two different mechanics and talked to Cervelo and still the thing won’t shift. Have had the cables replaced twice, relubed, inserts inserted…nothing…Anybody else experience this?
No it doesn’t really make sense… When you push the shift lever does the derailleur move? -If not, maybe it’s the shift lever that’s got a problem. Does the derailleur push on the chain? What’s keeping the chain from moving from one ring to the other?
I can’t imagine that this has anything to do with the fact that it’s a cervelo? However, I can’t imagine any front derailleur issue that a bike mechanic couldn’t immediately diagnose.
As I see it there are 3 options:
The lever is broke (mechanic should be able to determine VERY easily).
The front derailleur is broke (mechanic should be able to determine VERY easily).
The cable is attached to the derailleur incorrectly (mechanic should be able to determine VERY easily).
There is not much to it. The cervelo part of it is not important. I would get a third mechanic and not go to the other 2 again.
Front derailleurs (like rear derailleurs) have limits screws to prevent the derailleur from moving to far in and out and having the chain drop off the chainrings. Check the limits screws to see that they are allowing the derailleur to shift.
let me guess… You are a girl right? 
Just KIDDING
Easy, take it back to the store you bought!
The problem might be the very small fetzer ring. It’s really easy to overlook it. Maybe that or the blinker fluid?
Just got my second bike of any kind a week ago…it is a Cervelo P2C. This thing is so smooth. It runs like a wild donkey. Wait I am the donkey, it runs like a well oiled machine.
Sorry to hear about your misfortunes. But one this is for sure, you are going to love it when it is fixed.
the derailleur moves…but the chain wont budge, especially from big to small. I brought Cervelo into the mix because i met somebody else with a similar issue and the just told me to bring back to LBS. But, if you throw it on a rack it shifts like a champ…take it on the road and nothing. I brought it to a pro team mechanic who said that positioning the derailleur on a the P2 can be tricky…he put a small wedge between the frame and the derailleur and it shifted 85% better. Small to big…seems ok…big to small, no wasabi nada.
So, thats where I am with it now
Well since it’s a new bike, I’d take it back where I bought it and ask them to call you when it works.
Anybody else experience this?
Bad service at bike shops? Yes, it’s pretty common unfortunately.
Did you try to pedal as you shift?
Make sure you have enough cable. Sometimes if you cut the cable too short and you turn the front wheel it will prevent the cables from shifting.
One other idea that I had. When the derailleur is in a ‘relaxed’ position (no tension from the cable) it should move over the small chainring. When tension is applied by the cable it will pulled over to the large chainring. See that the bar end shifter and the derailleur are in sync.
Most of bikes that I have worked on (mostly my own) moving the shift lever forward moved the chain from the small ring onto the large ring (forward is faster). Move the shift lever back and the chain drops to the small ring,
Thats a good starting point. Tighten the derailleur cable with the bolt when the chain is on the small ring removing all the slack. Move the shift lever forward and the derailleur should move outward and the chain should hop onto the big ring. See that the shift levers have sufficent room to move to maximize cable pull. In other words, if the lever is not all the way back when on the small chain ring, the shift lever will not move forward enough to take up all of the cable tension and the derailleur will not move enough to properly shift. The opposite also applies as if the lever is not all the way forward, the too much tension remains on the cable and it will not move inwards enough.
I hope that this is understandable and that it helps. Of course, your shop that you purchased the bike from should do this for you. If it was male order (not a typo) thing then check with your local bike shop.
HB
remove the chain from the chainring. Shift the front derailleur. Can you see it move?
Can you see the cable moving when you shift with the front derailleur gear lever?
now switch the name to cantshift17.
Huh, so it is not just here! I am convinced about that to the extent that I am reading Zen’s Road bike mainenance book before going to bed these days…