I just want to know if there would be any special modifications in order to make it work?

stock photo of this bike

  • Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking.
    – Community Bot
    Apr 6, 2022 at 17:53
  • I think you can continue using the saddle, pedals, and maybe the stem+handlebar and grips. Tubes and Tyres too if you get the same size wheel. Everything else is likely to need changing. Cheaper to get a new bike, sorry.
    – Criggie
    Apr 23, 2022 at 13:22

1 Answer 1


If your bike has a 7 speed freewheel then no you can’t put a 1x12 system on the bike without changing the rear wheel and even then maybe no.

At a general level it depends on whether your rear wheel has or can be retrofitted with a Micro Spline freehub.

You'd need a 135mm Microspline rear hub (e.g Shimano FH-MT401) and that hub with cassette would need to fit in your frame which is not guaranteed.

All the Shimano 1x12 systems need a Micro Spline freehub to fit the 10 tooth gear.

If you’re stuck with an HG freehub you can still use the 11 speed 11-51 Deore CS-M5100 cassette.


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