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Video instructions and help with filling out and completing How Form 2220 Adjustment

Instructions and Help about How Form 2220 Adjustment

The most common question we get is how do I fix my shifting maybe it's not reaching all the gears or maybe it's making all sorts of noises whatever the issue and regardless of the maker level this video on mechanical rear derailleur adjustments will help you dial in your shifting for optimal performance Calvin Jones here Park Tool Company we hope this video will give you a whole new outlook on your bike shifting and before we begin is a quick overview of the components and procedures the rear derailleur is the mechanism that shifts the chain at the rear cogs the derailleur is connected to the shifter by a cable that passes through housing bikes commonly use an index shifter that moves two cables small predetermined increments with each click inside the derailleur body is a spring that constantly pulls the derailleur outward and our cable is constantly holding against that spring in various shift positions derailers are fitted with limit screws that stop the derailleur from moving too far inward and too far ours here we can actually see the limits through stopping the linkage at each end the function of limit screws is to prevent the chain from going into the spokes or into the frame our first procedure will be to set the age limit screw and after that we'll move on to indexing indexing is the process of lining up our guide pulley with the cogs so that each shift lines up with each cog the barrel adjuster located here or up at the shifter allows us to move the shift increments as shown Music after indexing we'll dial in our other limits crew then we'll check our B screw adjustment and we'll explain more on that later for now describe your tools which are a screwdriver or hex wrench for the limit screws and a repair stand for some way to hold your bike up so we can pedal and check those adjustments let's get started now we'll walk through the H limit screw adjustment our goal will be to dial it in as close as possible to that inward cog sometimes the lemon screws are unmarked and we'll show you how to identify which is which a little later we begin with the visual check of the derailleur hanger and if it's clearly bent things are not going to work well and you should watch this other video on hanger alignment if the bike has multiple front chainrings shift the front derailleur to the largest shift the rear derailleur to the smallest cog even if you're already on the smallest cog keep clicking until there are no more clicks this makes certain our shifter is fully actuated outward if the change is not shift to the smallest cog it's likely being stopped either by the limit screw or the shift position first turn the H limit screw counterclockwise a few turns pedal and see if it makes the shift outward if it's not shifting outward turn the barrel adjuster clockwise a few rotations pedal to see if it's yes so now everyone is on the smallest cog and we have no more clicks at our shifter now even if you just did this turn the barrel adjuster clockwise a couple of turns if there's a barrel adjuster located at the shifter it performs the exact same function turning either one clockwise a couple of turns add slack to the cable and this keeps us from confusing our shift position with our limit screw settings people often get those two things confused so here's a quick explanation we're currently on the outermost ship position and even if things look lined up the limits group might be set to stop the derailleur here here or it might be correct we won't know until we take our ship ting position out of the equation there are many ways to do this but easiest is to turn the barrel adjuster clockwise we remember this moves the shifting positions collectively outward now we'll be able to set our limit screw setting without getting it confused with our shift position we're now ready to dial in the eight screw if you can't tell which limit screw is the age group pick one and turn it in and out while watching the derailleur if the derailleur does not move try the other one the H limit screw will cause some motion we're going to find the correct setting by purposely making it too tight then we'll back it out slightly until it's just right so grab your screwdriver and tighten the age grew a half turn now instead of only seeing if it's too tight we're also going to listen for excessive noise while pedaling and if the front derailleur is making noise do your best to ignore it for now or find the fix in this other video back on the rear cogs we're here normal noise for this bike which tells us a limit screw is not yet too tight to tighten the screw again a half a turn now we hear excessive noise and we'll double check that it's coming from the chain rubbing against the next inboard cog if so the limit screw is too tight which is what we want for now by the way this doesn't damage your drivetrain at all in some cases an overly tight limit screw can cause a shift to the next cog back out this limit screw until it shifts back and creates excessive noise once we hear the excessive noise we begin to loosen a quarter turn at a time until the noise is gone if there are two settings that seem equally quiet go with the tighter of the two settings the H limit is now set now we'll turn the barrel adjuster counterclockwise a couple of turns we're getting it back approximately to where it was and don't worry it doesn't need to be.

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