Those are the fundamentals of a derailleur, after you understand those concepts the adjustment process makes much more sense. The easiest way to do this is using a barrel adjuster -- there's normally one where the cable runs into the derailleur and you may have another where the cable runs into the shifter or on the downtube for a road bike. Only a few things can cause your rear derailleur to dysfunction: hangar alignment, limit adjustment, cable tension, or broken equipment. No matter the number of gears on a bike, or the derailleur used, the adjustment process is the same for almost all rear derailleurs. When passing the chain through the rear derailleur, pass it to the rear derailleur body from the side of the pin/plate for preventing chain derailment as shown in the illustration. It is responsible for moving your chain from one cog to the next. shimano original parts; m9100 series original parts; r9100 series original parts; r8000 series original parts; r7000 series original parts; information. The goal in this adjustment is to set the limit that the chain can move at the Highest ‘H’ gear/ smallest ring. This guide can be used on most Shimano derailleurs with some small variance on some models but the principle of installing and adjustments are the same. The rear derailleur plate assembly is equipped with a pin or plate that prevents the chain from derailing. Adjusting the rear derailleur is a matter of tightening or slackening the shifter cable so that the chain runs smoothly for all rear cogs. Adjust the Upper Limit Screw of the Rear Derailleur The upper limit screw ( marked ‘H’ ) is positioned below the B-tension screw and just above the lower limit screw ( marked ‘L’ ). Adjust a Shimano 105 9x rear derailleur. 0. How to adjust your rear derailleur: What does your rear derailleur actually do? When adjusting the Shimano seven-speed derailleur, the rear derailleur … Locate the three Philips-head screws; these are the limit adjustment screws. Shimano's Altus rear derailleur is an entry-level derailleur for mountain bikes. When passing the chain through the rear derailleur, pass it through the rear derailleur body from the side of the chain derailment prevention plate as shown in the illustration. It does this by pushing or pulling the chain an exact amount determined by the shifter. Please see the following video that shows a derailleur adjustment being performed. The one thing I noticed when adjusting my derailleur, was the SLX shifter had very little slack on the bottom and top end of the shifting range. 0. If … Any other derailleur I have ever adjusted, without the limit screws properly adjusted, the shifter was fully capable of easily pulling the derailleur … 2. There will be letters indented in the metal near these screws; the letters are B, L, and H. Shift your bicycle into the lowest gear using the Shimano shifter on the right-hand side of the handlebars. However, in order to benefit from the use of an Altus derailleur, it must be adjusted properly. Shimano Tourney “Rapid Rise” Rear Derailleur Installation. The rear derailleur plate assembly is equipped with a pin or plate that prevents the chain from derailing. This means checking cable tension and the derailleur's limit settings. My 6 geared Shimano bike doesn't shift from higher to lower gears but does the opposite smoothly. Find the Acera derailleur system near the rear wheel and gears. The derailleur is known for its low price, easy adjustability, reliability and shifting accuracy. By adjusting the derailleur, the rider gets to shift effortlessly between these toothed gears. 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