So I just bought a new (used s-works Roubaix) off ebay. Ultegra grouppo. After putting it together and dialing it in for initial fit I took it out for a spin. It started ghost shifting and I couldn't smooth it out with the tensioner on the road so I took it home and put it on my stand. I disconnected the cable and set the limiter screws and then got it working nice on the small end of the casset, nice cable tension, good stop in 10th gear. As I started working up towards first it started getting noisy and the a little glitchy and then by the time I got to the top (1st gear) it would ghost shift.


To get it to work nice up on top I had to dial the tensioner in the opposit direction that I had to go on the bottom end. Once it got sweet in 1st gear as I would then work it down towards ten, the same thing would happen. Started getting noisy in the middle ,,, as I got closer to 10th it got glitchy and eventually when if would finally get into 10th it would ghost shift again and I would then have to feather it in the opposite direction of the answer on the other end to smooth it out.

I bought a new chain because the old one was right at the end of it's life. It didn't change anything. I lubed my cable and brifter and still have same problem. I'm pickeled between the top and bottom end. nI took it to my LBS and had them check to see if my hanger was bent and it was fine. The head mech was gone and the guy that was on shift tried to fix my problem and he couldn't find an answer either.

Lastly, the bike came with 6700 brifters and a 6600 rear derailure. Could that be the issue even though there both 10 speed?

I don't know what to do and hoped someone else could advise before I have to start buying new parts. I guess I could try a different wheelset,,, or put a different cassett on it before I start buying new parts.

None of the parts have any scuffs to indicate any drops/wrecks ect

Thanks

Ryan