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Shimano FH-MT901-B Micro Spline Rear Hub

Mfg PartNum:EFHMT901BC
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The Classic Rear Hub — Evolved

Whether you're seeking an improved hub or simply a replacement for a broken one, switch to the Shimano FH-MT901-B Micro Spline Rear Hub. The biggest difference with the new MT901-B hub compared to its predecessor is Shimano's new Micro Spline freehub, which was designed to accompany Shimano's new 12-speed cassette.

Shimano had to recreate their freehub body in order to allow their new cassette to feature gears smaller than 12 teeth. Also, the new hub transitions away from the traditional use of pawls in a freewheel to a design that uses a pulley freewheel. This allows the hub to engage every 7.6 degrees, which immensely reduces the amount of play before your cassette engages. Inside the hub are tried and true cone bearings with hardened and polished steel bearing shells and stainless steel balls, which provide an incredibly reliable and durable system, boasting exceptional service life and ultra-smooth performance.

For a bicycle that runs like new again, boost your bike with the Shimano FH-MT901-B Micro Spline Rear Hub. Not only is this hub probably a great upgrade from your old one, but this high-quality hub gets quieter as you go faster, so when in the groove your mind can be truly enlightened.


  • Hub engagement every 7.6 degrees
  • Centerlock disc mount
  • J-bend spoke design
  • Micro Spline ready for Shimano's new 12-speed cassettes
  • 28 or 32 spoke hole
  • 12mm x 142mm hub spacing
  • 12-speed Shimano Micro Spline freewheel compatibility
  • Durable 263 grams
  • Cone bearing with steel balls

  • B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

    Discount Codes are not applicable to Closeouts.

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    Mfg PartNum: EFHMT901BC 

    Disc Bolt Pattern: Center Lock 

    Hub Drilling: 28 Hole 

    Mfg PartNum: EFHMT901BC 

    Rear Hub Spacing: 12x148mm BOOST mm

    Ordered by Most Relevant First
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    Reviewed 12/11/2020
    by jkcpls
    Cycling Enthusiast
    Folsom, CA
    Value Rating
    Overall Rating
    Great hub for the price!

    This hub is a great value if you have a Microspline drivetrain. Works great!

    Was this review useful to you? Yes/No
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    *Orders received before 3:00PM Pacific time are shipped the same day (Mon-Sat). Orders over $50 are shipped free (USA only, excluding AK and HI). Some exceptions apply. See Shipping for details. 19