21 
3 Poor front gear shifting performance
My front gears won't shift properly into third gear.
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Rep: 67
2
If your shifting used to be fine, your shifter cable may need to be tightened or perhaps the derailleur was knocked and rotated. Park Tools has published a pretty good guide on adjusting derailleurs, but your results may vary depending on the type and model of derailleur you have.
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now I found the problem the front gear wire is into 1 strip
Rep: 13
1
front derailleur usually has a 'over-shift' screw which keeps it from shifting too far and pulling your chain off the front casett. With riding this can rotate in/out.
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