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Bicycle chain jumping

Asked Apr 8, 2012, 01:07 AM — 4 Answers
What would cause a chain to jump gears on take off and how can it be fixed?

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4 Answers
Curlyben's Avatar
Curlyben Posts: 18,167, Reputation: 8753
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#2

Apr 8, 2012, 02:45 AM
Normally this would indicate a tension or location issue.
What type of bicycle is this ?
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NeedKarma's Avatar
NeedKarma Posts: 10,261, Reputation: 8870
Uber Member
  
#3

Apr 8, 2012, 04:27 AM
Or it could be a derailleur alignment issue. What derailleur do you have?
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odinn7's Avatar
odinn7 Posts: 4,816, Reputation: 5071
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#4

Apr 8, 2012, 06:11 AM
Deraillieur or the chain is stretched and worn...or both.
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ScottGem's Avatar
ScottGem Posts: 58,578, Reputation: 28375
Computer Expert and Renaissance Man
  
#5

Apr 8, 2012, 07:13 AM


The first thing to check (and most likely reasons) is a derailleur adjustment. Especially if you have indexed shifters (that click to change gears). On the derailleur are tensions srews to adjust the tension of the gear cable. you can play with that adjustment in tiny increments until the shift works smoothly.
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