27+ Configuration Niner Headset - ZS Lower Cup- Mtbr.com
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  1. #1
    mtbr member
    Join Date
    Oct 2012

    27+ Configuration Niner Headset - ZS Lower Cup

    Can someone tell me if these replace the lower headset cups that press into the frame to correct the geometry from 29" to 27+ wheels?

    15mm stack lower cup for Niner ZS headsets - corrects geometry when using 27.5" Plus wheels

    Thanks in advance.

  2. #2
    Drinkin' the 29er KoolAid
    Reputation: kwarwick's Avatar
    Join Date
    Jun 2004
    I'd be interested in knowing also.

    If you have to knock the old lower cup out and press a 15mm one in that is not something you want to do more than once or twice so would it not be a good solution if you want to be swapping between 29 and 27.5+ wheels with any regularity.

  3. #3
    mtbr member
    Reputation: Rocket88R's Avatar
    Join Date
    Jan 2013
    I put a Works Components -1 degree Angle headset on my 2013 RIP 9 when I converted to 27.5 plus. I wanted a slack HA. I now have a set of 29" wheels and I swap between the two wheel sets with the same headset. No issues, it rides fine.
    Schwinn: 1999 46 Banger-21"

    Banshee: 2015 Phantom-L

    Guerrilla Gravity: 2018 Shred Dogg-M

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