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My old folding bike does not have a hanger in the frame for the derailleur. However, it has a SunRace M2T derailleur that includes its own hanger.

But I need to replace it, as I replaced the 5-speed freewheel with a 6-speed one, increasing the largest cog from 28T to 34T as well (specifically a freewheel 14-34T Shimano MegaRange F-TZ30-CP), and as expected, the old derailleur is not working smoothly after so big of a change.

So, I need to replace the rear derailleur with a "better" unit and all of them require a HANGER in the frame.

sunrace m2t

What type of hanger do I need? Also, steel or aluminum?

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  • Actually, sunrace make one. And it's cheap. I'll iook for the part no.
    – Noise
    Commented Jun 19 at 14:40
  • Aluminium. You want the hanger to sacrifice itself and protect the frame in the event of a crash or a bash. To that end, hangers are made with a relatively soft grade of aluminium.
    – Warren Burton
    Commented Jun 19 at 20:01
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    @WarrenBurton I don't think that's a concern for this type of hanger....and I doubt an alu version is madc
    – Noise
    Commented Jun 19 at 22:09
  • Worth noting all of Sunrace's M2T 6 speed derailleurs are max 28T compatible. So you will likely need to opt for a different brand/model
    – Nate W
    Commented Jun 19 at 22:27
  • 28T is frequent max cog. However many derailleurs can reach more teeth but you need to test or find unofficial information. This Sunrace M2T would work perfectly with 32T
    – Daniel Perez
    Commented Jun 25 at 19:29

1 Answer 1

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Sunrace SP550

works with all standard derailleurs. Very cheap to buy.

Other brands possibly (or possibly not) available.

enter image description here

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