I adjusted my rear dropout back by about 1.5", and now my derailleur is in a much more extended position in the easy gear due to the increased effective chainstay length. It now makes more noise and feels a little less smooth than it did before I moved the rear axle back.

The b-set screw has to be just about all the way in for the derailleur to clear the big 46T cog (this is a Shimano GRX RX812 derailleur only designed for a 42T). There's room for the chain to be longer in the hardest gear without running out of tension.

Two questions: do I need a longer chain, and can I just add links using a second quick link (I kept the links that I took off the chain when I installed it initially).

Thanks!

Do I need a longer chain?
byu/Lorax1 inbikewrench



by Lorax1

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2 Comments

  1. Automatic_Regular523 on

    Yes and yes. It’s normally better to show a picture of the bike in the small gear as well just to see if two links would be two slack.

    You can add a link with quick link however this is not recommended by the manufacturer. Most people do it anyway

  2. Minute-Preference383 on

    Do you have a link extender? Will make your life easier. In theory you shouldn’t relink your chain as per Shimano manual, but in practice its ok.

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