Help? What is this sound!

Is your chain correctly routed through the rear derailleur? I can't really tell since you keep moving the camera around. maybe a closeup of the side would help.

Sounds like the limit screw is off a tad at the small cog end of the cassette.

alienator said:

Sounds like the limit screw is off a tad at the small cog end of the cassette.

That's my pick also. Loosen the limit screw and it should allow the rear mech to complete it's travel and align with the bottom cog.

I have that low and high screw,, the limit screw is the other one correct?

both of those are limit screws- one controls the limit on the outer end, and the other controls the limit on the inner end

thanks guys, i kept messing with those screws and i eventually got it. I'm a little confused, there is the high and the low limiter screw. Im not quite sure what i understand how two screws work, and why it wouldnt be just one. If anyone feels like helping a noob understand it's appreciated 🙂

check this out:

Park Tool Website

Read through the whole thing step by step. The H screw controls how far the derailleur can go in the direction towards the smallest cog, and the L screw controls how far the derailleur can go in the direction towards the biggest cog.

I had to adjust my rear derailleur frequently when I used to use Sora. I like this tutorial cause you gotta purposely overtighten the screws before you loosen them, and that gives you a good feel for how your derailleur works.

thank you very much, all of this has been such a mystery to me and it sure is making more sense now!!!