Mountain Bike Rear Derailleur Adjustment Indexing

Most modern mountain bikes have derailleur gears. The majority of rear shifting problems can be solved with basic adjustments to the limit screws and index setting of the rear derailleur system. Once bent the derailleurs and pulleys are not going to align with the sprockets.

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These bike gears operate by shifting the bike chain up and down a cassette of cogs on the rear wheel each cog offering a different gear ratio.

Mountain bike rear derailleur adjustment indexing. Don t get too hung up on this particular adjustment. In this video. You just cut your drivetrain problems in half. For older bikes with front derailleur issues the solution is quite simple.

How to adjust a rear derailleur limit screws indexing. Move chain onto the smallest chainring. Use your hand to move the derailleur and push the chain onto the biggest chainring by turning the pedals. Remove the front derailleur and replace the chainrings with a single 1x specific ring and wide range cassette.

All 10 speed shimano mountain bike components are also inter compatible you could for example use an old 10 speed xtr m986 rear derailleur with new deore m610 shifters. The derailleur is moved by tightening or relaxing the cable tension. The name gives away the method. If the bike is shifting well the b screw is probably within acceptable adjustment range.

To increase the gap tighten the b screw. The derailleur arm simply de rails the chain from one cog to the next. You can use a hex wrench to gauge this distance. If the derailleur can push the chain too far adjust the limit screw.

The majority of road and mountain bike derailleurs require a gap between 5 and 6 millimeters. We will stick to problems that plague rear derailleurs as 1x setups are common on most modern mountain bikes. Gently release the derailleur and move the chain back onto the smallest chainring. The global mountain bike network is the best mtb.

The indexing and adjustment of your gears is done using the cable tension. The highest gear smallest sprocket on the rear derailleur is actually the point of lowest cable tension meaning the derailleur is doing the least work and is thus easiest to adjust. Tighten the cable retaining bolt. The rear derailleur should move the chain to run on the smallest rear sprocket and the upper jockey wheel of the rear derailleur should be directly underneath the smallest sprocket.

While pedaling the bike locate the cable leading to your rear derailleur and pull on it gently. The rear derailleur is attached to the frame with a hanger these are commonly aluminum but may also be steel. High gear adjustment with the tension removed from the cable turn the pedals. Crashing or throwing the bike down on the right side can bend this hanger.

How to fix the shifting on your bike.