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  1. #1
    mtbr member
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    Oct 2005
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    BB7 on QR20 which adapter?

    Tried mounting a new bb7 (160mm) on a 2003 Z1 Marzocchi (tab disc brake mount) with QR20 dropouts and the included adapter does not line up the caliper correctly. Same think on an older 2002 Bomber QR20mm. The manual lists various adapters without any instructions. The 2010 parts list indicates various adapters without instruction. See below (page 29)

    http://www.sram.com/_media/techdocs/...%20list%29.pdf

    Will be adding a 185 mm rotor, but would like to ride the bike now with the 160mm. Anyone know the correct adapter to order for the 160 rotor and 185 rotor?
    .
    Thanks
    urmb

  2. #2
    Nouveau Retrogrouch SuperModerator
    Reputation: shiggy's Avatar
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    47,994
    Quote Originally Posted by urmb
    Tried mounting a new bb7 (160mm) on a 2003 Z1 Marzocchi (tab disc brake mount) with QR20 dropouts and the included adapter does not line up the caliper correctly. Same think on an older 2002 Bomber QR20mm. The manual lists various adapters without any instructions. The 2010 parts list indicates various adapters without instruction. See below (page 29)

    http://www.sram.com/_media/techdocs/...%20list%29.pdf

    Will be adding a 185 mm rotor, but would like to ride the bike now with the 160mm. Anyone know the correct adapter to order for the 160 rotor and 185 rotor?
    .
    Thanks
    urmb
    They do not make them. The 20mm bracket is for a 203mm rotor.

    You can use the standard IS 160 or 185 brackets with longer bolts and ~5mm of washers/spacers.
    mtbtires.com
    The trouble with common sense is it is no longer common

  3. #3
    mtbr member
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    Thanks Shiggy. 5mm spacers worked.

    urmb

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