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6 speed kids bike derailleur
#1
I have a cheap kids bike with 20" wheel, a 6 speed right thumb shifter, single front chain ring. The derailleur needs to be replaced. I have an 18 speed parts bike that I plan to take the derailleur from. will that work?

Dan...
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#2
Probably. If it mounts to the frame in the same way (integrated hanger vs. frame mounted hanger) and is of similar cage length, you shouldn't have a problem. If the 20" has index shifting and the two shifters are different brands, it might mess up the indexing.
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