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Adjusting your rear mountain bike derailleur limit screws.

Limit screws.

limit-screws

 

The limit screws adjust how far sideways the derailleur can move.

adjust-sideways

 

The lowest limit screw sets the limit for the largest cog (lowest gear)

largest-cog-adjust

 

And the highest limit screw sets the limit for the smallest cog (highest gear)

smallest-cog-adjust

 

If you turn the limit screws clockwise the derailleur will move inwards and anticlockwise will move the derailleur outwards.

move-inwardsmove-outwards

 

 

Adjust the limit screws for both the smallest cog and the biggest cog making sure the derailleur doesn't go too far and hit for example the spokes.

One of the best way to do this is to set to the highest or lowest (whichever you are adjusting) gear.

Example below is for adjusting the smallest cog.

Turn the pedals and turn the limit screw so the derailleur is in the gear before the smallest gear

second-cog-from-smallest

 

Next turn the pedals and turn the limit screw so the chain just jumps and sits nicely on the smallest cog.

 

After this is done the limit screws adjustment is finished and the next step is to adjust the barrel adjuster.

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