Can I replace a (6-speed) Shimano MF-Z012 with a (6-speed) MF-TZ500 or MF-TZ510 freewheel?

Bonus question: apart from the "T" both models seem to belong to a related series. What does the "T" mean?

  • 1
    The T makes me think of Tourney, the Shimano product tier, see the TZ510 product page, though that is a little speculative/assumption. I'd be more intrigued to know what the Z is for, though that seems to be a longstanding inclusion
    – Swifty
    Commented May 2, 2021 at 20:02

1 Answer 1


Both of these models are freewheels not cassettes. They are for the most part interchangeable. The only area of concern would be the size of the largest cog. Too large a difference from you original model may necessitate a longer or shorter chain. You may also need to make some small adjustments get the shifting optimized.


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