[stumpjump]

Ok, so I am having issues with shifting on the bike. Under noral constant steady pedaling, I have no issue, although I have noticed that when I really crank it the rear deraileur seems to skip just a bit. I have worked with the fine turing of the adjustment knobs and it doesnt seem to matter where they are, they still seem to skip when I really push it. Know not being a genius in the area I figured I would hand it over to all of you guys to throw ideas of why it may be doing this.

Any help would be much appreciated.

 

[Wumpus]

New cable and housing?



One of the biggest reasons for older housing/cable not shifting correctly is that housing compresses:

Left to right:

1)What the housing should look like.
2)The housing is compressed and you can see the inner sheath sticking out.
3)Housing compressed and you can see the wires inside.
4)more of the same and a little rusty.


Easy fix is to undo the cable at the derailleur and pull the cable out. Trim the ends of the housing and put back together. Trim the ends with either a cable cutter like this park or a lot folks use a rotary cutoff tool. You will also need some type of sharp pointy tool to fix the inner sheath which usually gets pinched shut when cut.

 

[BrooklynMachine]

Running housing continuously from shifter to Der. may help as well depending on if you ghost skipping is related to suspension movement.
How old is your chain/cassette?

 

[Quo Fan]

Check that your hanger isn't bent. That will cause ghost shifting also.

 

[DesuL]

What kind of shape is your chain and cassette in? If your lines are good and you really know how (KNOW not think, I have made this mistake) to adjust your deraillur it could be your cassette and chain are worn and its time to replace them.

If you have questions to make sure you are setting it up correctly then post up and I or someone can walk you through it. If thats done and its happening im going to guess you have, chain stretch/wear, a worn cassette or not enough housing (very unlikely but have had it happen on a road bike before)

 

[Wumpus]

If it is a full suspension bike, you may have a section of housing that is getting tweaked when you crank on it. Again, something that a full run of housing may fix.

 

[methodman]

Sounds to me like your cassette and chain aren't meshing properly. So if you just put a new chain on it when your old one was all the way worn out, the cassette gears have streched as well and will work fine with a little pressure, but any cranking on them will cause the chain to slide forward. So if you just got a new chain and this problem started happening, replace your cassette or freewheel and you will be fine!

 

[stumpjump]

Turns out I was being retarded. I neglected to look at my front chainring. Have quite a few sharkteeth on it. Switched it out and all is back to normal.