FAQ: How To Adjust A Front Derailleur On A Mountain Bike?

How do you adjust a front derailleur without a barrel adjuster?

First, properly adjust the limit screw to eliminate any chain rub and produce no more than 1mm of additional cage to chain clearance, without the cable attached. After that, deliberately turn the low limit screw CW about 1/2 turn. Use pliers to grab the cable, pull it tight and tighten the cable clamp bolt.

How tight should front derailleur cable be?

You need to pull it pretty tight before clamping it to the derailleur. Probably as tight as you can. Usually I find that’s still not tight enough, so I screw the barrel adjuster down all the way before putting the cable in and then open it up until the tension is correct.

Should the front derailleur touch the chain?

The reason the chain rubs is because the cable is too loose. And when it’s too loose, shifting onto the large chainring results in only a partial shift. With sufficient tension on the derailleur cable, the derailleur cage will move to its full outside limit and there will be clearance for the chain – and no rubbing.

Are front derailleurs interchangeable?

In addition, front derailleurs are made for either 7, 8, 9 or 10-speed chains, but they can often be used interchangeably. If you are using a different chain than your derailleur was made to work with, the degree of adjustment you can expect will be lower than with a matched set.

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Why does my chain slip when I pedal hard?

Most of the time, a skipping chain is caused by cable stretch. In the first half dozen rides on a new bike your shift cables stretch the most. They can also stretch over time as you ride. Hippley explains, “It takes cable tension to open a derailleur, which shifts your chain between gears.

Why is my derailleur hitting my spokes?

It is possibly bent/tweaked and the only way to know for sure is to put an adjustment/alignment tool on it and check. If it is it is generally and easy tweak to put it back in alignment, then realign/adjust your rear derailleur.

Do you adjust front or rear derailleur?

In a nutshell, adjust the front derailleur first, then the rear. If the derailers just need minor tweaking (they are basically in adjustment but are “not quite right”) then you adjust the one that is obviously wrong, check the overall adjustment again, then again adjust what needs adjusting.

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