Here I am again, stopping by to mine you folks for information. I bow to your superior knowledge.
Anyway, I have a Cannondale Quick hybrid which I ride a lot. Yesterday on a ride the cable to the rear derailleur snapped. It had rusted through. I bought a replacement cable and strung it through the old housing. I am on a trip and working on bikes on a picnic table is a bit awkward.
For the life of me I can not seem to get the cable tension correct. I have strung derailleur cable twice before and set up the tension using Park Tool's instructions. I tried that here but cannot get it right.
According the Sheldon Brown:
Shifting to larger sprockets is accomplished by tightening the cable;
if such shifts are slow, the cable is not tight enough--
turn the barrel counterclockwise to tighten it.
Shifting to smaller sprockets is accomplished by loosening the cable;
if such shifts are too slow, the cable is not loose enough--
turn the barrel clockwise to loosen it.
Of course, first of all you have to be in the ballpark of correct tension just by how tight you pull the derailleur cable when you string it through and tighten the nut.
Here is what I did and the symptoms:
At first, I could not shift onto the smallest sprocket. So, I turned the barrel adjust clockwise. Not enough room to turn enough so I started over and let out a little cable at the nut. OK, now it shifted to the smallest sprocket and up to the second sprocket. After a lot of fussing.
But, I would not shift well up from there. And, it wouldn't go onto the two largest cogs. So, I turned the adjuster counterclockwise. It could finally get it up to the second to the largest cog but not the largest. And now it won't do on to the smallest two cogs.
I rode my bike five miles so I could meet my year end goal. The shifting will slip from larger to smaller cogs.
So how come I can't get this right? Suggestions? Before the cable broke the shifting was fine.