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Gears changing on there after?

irishrover99 · 2015-06-05 21:02:33

i just fitted a new cassette and chain and the gears are changing on there own. The chain is the same spec that I got off the giant website and the cassette is the same ratio as the previous one. Have I made a mess of the chain size?

05-06-2015 09:02PM

#1

irishrover99

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Join Date: October 2013

Posts: 1975

i just fitted a new cassette and chain and the gears are changing on there own. The chain is the same spec that I got off the giant website and the cassette is the same ratio as the previous one.

Have I made a mess of the chain size?

0

Comments

#2 05-06-2015 09:40PM

Cee-Jay-Cee

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Join Date: May 2007

Posts: 11882

irishrover99 wrote: »

i just fitted a new cassette and chain and the gears are changing on there own. The chain is the same spec that I got off the giant website and the cassette is the same ratio as the previous one.

Have I made a mess of the chain size?

I'd imagine you just need to re-index the gears using the barrel adjuster at the rear dérailleur. It's a very simple 5 minute job. Have a look on YouTube for 'adjusting rear derailleur' there are plenty of videos showing you how to do it yourself. No tools needed.

0