I'm doing a 1x conversion with a Shimano SLX (M7000) groupset on an old road frame.

I just installed the rear derailleur and the pulley is too far away from the cassette. 18mm from the max cog (recommended is 4mm-5mm). However the B screw is all the way out and screwing it in only widens the gap. Not sure what's going in. Maybe the chain is too short?

Some photos of the setup: https://i.sstatic.net/b3Wpp.jpg

  • RD-M7000 GS Rear Derailleur Medium Cage
  • CS-M7000 Cassette: - 11 Speed 11-42T
  • Could you upload a picture of the whole drive-train from the right side as well?
    – Carel
    Commented Jun 13, 2020 at 7:43
  • 1
    Observation: neat older steel frame with horizontal drop outs. The hub axle is all the way up in the drop outs and that could be placing it higher than normal?
    – Swifty
    Commented Jun 13, 2020 at 8:07
  • It looks to me like the chain is 2-4 links too short. Commented Jun 13, 2020 at 15:36
  • @Carel I added a photo of the drive-train Commented Jun 13, 2020 at 18:41
  • @Swifty interesting observation, do you recommend putting spacers there or just eyeballing it? Commented Jun 13, 2020 at 18:41

1 Answer 1


First, take the chain off and shift the derailleur into position and see what happens. If it's still too far away, you can possibly eliminate the short chain (which does look too short) from the equation.

Without the chain, you should be able to see what is causing the derailleur to sit at that position.

You should be able to find what's preventing the jockey wheel from coming in closer contact with cassette ring by flexing and contracting all the movable parts on the derailleur.

Possibly, the derailleur hanger places it too far out?

  • 1
    Super helpful. Moving the wheel so that the hub is lower in the drops has essentially fixed everything. And shifting is much better. I believe a longer chain would have the same effect without moving the wheel but haven't tried. Thanks! Commented Jun 14, 2020 at 21:24
  • Getting closer... I don't like the QR not being nestled full in the drops (unless they are horizontal drops with an adjuster screw) but looking at the wear on that bike, it seems that's been how it was run... you might get away with it with the 45degree angle drops, but getting things lined up just right will be tricky... I'd keep sleuthing. Commented Jun 15, 2020 at 1:20

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