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Thread: Avid BBDB

  1. #1
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    Avid BBDB

    Anyone else have one of these early versions of the mechanical disc brake? I don't know much about it, but it is working sweetly on my commuter. I think it was the first 'ball bearing disc brake' (hence the name). It's got dual adjustment knobs and works as well as the BB7's I've used. I found it in the shop and threw it on... pleasantly surprised. I'm a little worried about finding pads for it though.
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  2. #2
    LDH
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    I believe it is identical to the bb7's up to the redesigned one with the square pad adjusters.

  3. #3
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    Yes. There is the Type F (earliest) and Type N (later). The BB7 and BB5 came out when SRAM bought Avid.

    I have the Type N because they were 12g (per caliper) lighter than the other versions.

    The pads are everywhere because they the same as all BB7s or all Juicys. BB5s are a round pad, which is quite different.
    Last edited by egebhardt; 06-01-2010 at 09:11 AM.

  4. #4
    B A N N E D
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    The BB7 Overhaul Guide the on the Sram website is actually a BBDB Overhaul Guide.

    http://www.sram.com/_media/techdocs/Avid%20BB7%20Overhaul%20Guide.pdf

    That'll probably give you an indication of how much difference there is between a BBDB and a BB7.

  5. #5
    No longer 26
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    The original BBDB's used 165 mm rotors instead of the now "standard" 160 mm.

    G (I have 2 sets)
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  6. #6
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    Yeah, but that's just a matter of the adapters and rotors they were speced with. That didn't make the calipers any different.

  7. #7
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    Quote Originally Posted by cobba
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  8. #8
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    Quote Originally Posted by cobba
    The BB7 Overhaul Guide the on the Sram website is actually a BBDB Overhaul Guide.

    http://www.sram.com/_media/techdocs/Avid%20BB7%20Overhaul%20Guide.pdf

    That'll probably give you an indication of how much difference there is between a BBDB and a BB7.
    The BBDB Type N in that manual requires the Avid MDT-1 special tool. The BB7s and BB5s were redesigned to eliminate the need for the tool.

    This covers the BBDB and BB7s very well. http://forums.mtbr.com/showthread.php?t=365630

  9. #9
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    Cool, so I can throw BB7 pads in there? I haven't actually removed the pads and looked at the shape.

    Also, can I assume that the adapter for a BB7 will work if I want to go to a 180 rotor?
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  10. #10
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    BBDB= ball bearing disc brake
    (and being a former hayes cable pulled brake owner, trust me, the ball bearings made a BIG difference in feel)
    If steel is real then aluminium is supercallafragiliniun!

  11. #11
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    Quote Originally Posted by Hardtails Are Better
    Yeah, but that's just a matter of the adapters and rotors they were speced with. That didn't make the calipers any different.
    No, the caliper was changed when they went to 160mm rotors. The IS brackets were not changed.

    I have been using the BBDB since year 1 and all versions of the BB7. To use the original caliper with 160mm rotors I need to file down the mounting bracket.
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  12. #12
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    ^^ Do you file down both sides, or just one, to 'rotate' the caliper down a little?

    Would a 180mm BB7 adapter work to use the BBDB with a 180 rotor? Would I need to file that too?

    thanks.
    You have no excuse for driving to work
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  13. #13
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    Quote Originally Posted by CommuterBoy
    ^^ Do you file down both sides, or just one, to 'rotate' the caliper down a little?

    Would a 180mm BB7 adapter work to use the BBDB with a 180 rotor? Would I need to file that too?

    thanks.
    You would need to file down the bracket a lot for a 180mm rotor. Only need to file off about 2.5mm for a 185mm rotor. The goal is to not have the pads hanging off the outer edge of the rotor.
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  14. #14
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    So file, check, file, check...

    I will probably try this... I have 180 rotors and a bench grinder on standby. So standard BB7 adapters is what I want to start with? Even if I have to file 5mm, that should leave plenty of threads for the mounting bolts to grab.... (famous last words )
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  15. #15
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    Hmmm.
    I have BBDB Type Ns and they work on any 160mm rotor I have.
    I would expect the same for 180s.
    The proof is in the pudding.

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