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I have taken my mountain bike to 2 different shops to have my gears adjusted.

They do not shift properly and end up "clicking" instead of shifting into the correct gear.

I have had 2 shops adjust the bike and the adjustment never lasts more than 3 or 4 days.

My chain and all components are very clean.

Is there a fix for this problem?

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It sounds like after the bike has been in the shop the gears work correctly for a short time, but then the indexing goes out again.

In my experience, the most likely cause of this is poor quality cables. Usually after cables are fitted they stretch and need the tension adjusting, but after this tend to be problem free.

However I have had experiences on a cheaper bike where the cable would just keep stretching - in the worst example it took 3 months of being adjusted twice a week before they finally started to behave.

I highly recommend learning how to index gears yourself as it's fairly easy to do and saves you a lot of time/money going to the bike shop.

GCN do a whole range of bike maintenance videos, here's one for adjusting the rear derailleur:

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  • My local bike shop used a gauge to measure my chain stretch. It showed it needed replacing. One is on order. He is also looking for an adapter so the bike can be outfitted with a higher quality derailleur. He replaces his chain 5 times a year. My bike is about 18 months old and has the original chain.
    – fixit7
    Commented Aug 15, 2019 at 13:40
  • If the first 2 shops failed to do a simple chain stretch test, its a good sign never to go there again!
    – Andy P
    Commented Aug 15, 2019 at 13:50

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