Ways of limiting a 9sp derailleur for a 6sp cassette

[csermonet]

I have an x9 9sp rear derailleur and just built a 6sp cassette and am having difficulty limiting the rear derailleur. I bought a longer limit screw and installed it in place of the low limit screw. When fully turned in to keep it from shifting into 3rd gear(which is nonexistant) it binds on part of the knuckle and wont let the derailleur shift up at all. From the looks of it, it looks near impossible to make an x9 work with a 6sp cassette. Am i going about it the wrong way? Am i replacing the wrong limit screw? Suggestions are welcome!

[- seb]

I can't offer any help with sram, but in case it's useful to you or anyone else, I can tell you that with a longer limit screw I've been able to adjust my Dura-Ace 7800 mech all the way down to the 5-speed that I'm currently running.

[csermonet]

Encouraging, but indeed useless for my application lol.

[csermonet]

care to post pics of your setup?

[jonKranked]

what do you mean, "binds on the knuckle?"

[Freeridin']

Space your cassette inward one gear width. Dial in your high limit and dial out your low limit. Should be enough to stop the binding.

Or grind down where the screw hits...presumably the tab where the original limit screw sits.

[jonKranked]

also, post some pics of the casette setup.

[- seb]

Space your cassette inward one gear width. Dial in your high limit and dial out your low limit. Should be enough to stop the binding.

Not as easy as it sounds, as most people want to run an 11t cog, and they sit on the end of your freehub unless you do some extensive dremelling. You'll also need to ensure that the spacer you use has an outer diameter small enough that it won't foul the chain when on the smallest cog.

[csermonet]

Im using a cheap shimano cassette, same one ive had for a while now. The cassette is a bunch of individual cogs with a spacer between each one. the whole assembly is held together by a screw and when you back it out, you can remove, replace, do whatever you want with each individual cog. I took the 3 low gears out and replaced them with extra cassette spacers i got at my lbs. Not sure if my description sounds like it, but it was a very easy process. almost free to do.

as far as the limit screw binding on the "knuckle", maybe i used the wrong word. when i screw the limit screw all the way in, it gets caught on the side of the tab that the original limit screw came in contact with. If i dremel the tab down, it looks as if the "knuckle" or "parallelogram" or whatever you want to call it, will still come in contact with the limit screw much too soon and keep it from shifting all the way up. I might try spacing it in one gear width

[jonKranked]

pictures pictures pictures

[csermonet]

lol let me see what i can do, give me 2 minutes

[csermonet]

The first pic you can kind of see how I made it. The 2nd one shows where the limit screw is giving me trouble

[Bill in Houston]

Im using a cheap shimano cassette, same one ive had for a while now. The cassette is a bunch of individual cogs with a spacer between each one. the whole assembly is held together by a screw and when you back it out, you can remove, replace, do whatever you want with each individual cog.

figure out where the derailleur DOES want to shift to, and put the cogs there.

[csermonet]

I think if I spaced it back one width it might work, problem is my last gear is 11t. Any other solution?

[jonKranked]

figure out where the derailleur DOES want to shift to, and put the cogs there.

you can't fine tune the cassette that way; the indexing of the shifter is matched to the standard cassette spacing.