Lateral chain movement

Ben6899
Ben6899 Posts: 9,686
edited March 2014 in Workshop
Straight forward question, I think.

Is it "normal" to to see lateral chain movement as it runs between the cassette and chainrings?

If I view the chain from above, "measuring" against the FD cage then there's some lateral movement of the chain ~1mm.

The bike runs fine and the front shift is good with no chain rubbing in big-small/small-big. I have had a look at the chainring against the FD cage and any run-out is easily within manufacturing tolerance, we're talking ~0.5mm. DS and NDS show no movement - in fact, I just had it all nipped up by the LBS about a month ago.

What are everyone's thoughts?

Cheers
Ben

PS. DA7900 FD, chainset / SRAM chain, cassette
Ben

Bikes: Donhou DSS4 Custom | Condor Italia RC | Gios Megalite | Dolan Preffisio | Giant Bowery '76
Instagram: https://www.instagram.com/ben_h_ppcc/
Flickr: https://www.flickr.com/photos/143173475@N05/

Comments

  • smoggysteve
    smoggysteve Posts: 2,909
    If there is no chain rub and no ghost changing or difficulty changing gear, does it matter?
  • Ben6899
    Ben6899 Posts: 9,686
    I suppose not? It's just something I haven't noticed before so I thought I'd ask here.
    Ben

    Bikes: Donhou DSS4 Custom | Condor Italia RC | Gios Megalite | Dolan Preffisio | Giant Bowery '76
    Instagram: https://www.instagram.com/ben_h_ppcc/
    Flickr: https://www.flickr.com/photos/143173475@N05/
  • smoggysteve
    smoggysteve Posts: 2,909
    1mm is not a lot really. its probably just an imperfection in the ring gear and crank. I have noticed it a bit before where a chain catches the front mech at a certain part of its rotation. so long as your gears are set up properly so you dont get chain rub I really wouldn't worry.

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