Bottom Bracket Selection Guide
Don't Adjust a Rear Derailleur Until You Do This
Like all precision processes, adjusting a rear derailleur must be done in steps, beginning with the fundamentals. The derailleur is engineered to move in increments through a pre-determined path. If the derailleur isn't positioned properly in relation to the other components in the system, like the cassette, every move will end up in the wrong spot and you will never be able to get it right and running smoothly. Here's how to adjust a rear derailleur correctly from start to finish, every time.
An often-neglected step in installing pulleys is to make sure that the derailleur hanger is straight. Now in this particular one we want to go ahead and turn off this little clutch it's going to make it a lot easier to remove the derailleur and you all you need to do is undo this bolt right here and just to draw your attention to this you know these newer Shimano derailleurs like the r8000 9100 they have like that short dog bone link and then the derailleur flies off from there. This particular one has this proprietary set up with this through axle, but it's still the same basic system and somebody had the foresight here to make sure that this bolt right here was the proper diameter and thread pitch for us to be able to use our standard derailleur hanger straightener and in this case, we are going to use a Park Tool dag- 2.2. These are very inexpensive, and they do a great job and I've been using this one for years. So the first thing you need to do in this aspect is to screw it in without cross threading it and make sure that this wheel is uh straight you if this wheel is not true you need to true it before you can use it to touch off on obviously because what we're trying to do here is we're making sure that this derailleur hanger is uh straight so that the derailleur can operate uh in its um proper parameters because it's located in space correctly now this one is dead on but if it needs to be adjusted it's kind of like a it seems kind of crude but you just kind of tweaking it a little bit and you better kind of bump it you don't want to make any kind of like gross adjustment because uh it's going to snap off in a heartbeat so if you uh once you get this thing nice and straight and you've touched off all the way around in a couple of spots on the same spot on the brake track you know it's nice and straight you can go ahead and disconnect this and reinstall the derailleur now what you're going to want to do is you're going to want to kind of grab it like that and see if i can actually do this in one take we'll go ahead and put that bolt right in there like that and it's absolutely essential that you get it lined up properly because you do not want to cross thread this bad boy or once again it's going to start messing up your day something fierce so go ahead and give that a little give that a little tweak right there nice and tight and uh and then from there you can just go ahead and adjust the gears as necessary
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