Need some advice...Chainguide/BB help- Mtbr.com
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  1. #1
    MTBiker
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    Need some advice...Chainguide/BB help

    Hey,

    Right now I have 32 tooth and 22 tooth rings on my VP free and an MRP LRP chainguide. There is no front derailleur. It has an internal BB, and a 1/4" spacer between the end of the BB + chainguide and frame so the guide lines up correctly with the rings.

    I want to make it a single front ring (32 tooth) and then get a nice chainguide so it won't bounce off.

    I think all I need is an external BB (getting one anyway), and the chainguide.

    http://www.pricepoint.com/detail/133...E.Thirteen.htm

    http://www.pricepoint.com/detail/155...et-'07.htm


    Do those look good?
    Are there any cheaper alternatives?
    Which MRP roller guide is designed for a single ring?


    Thanks!

  2. #2
    MTBiker
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    bump

  3. #3
    mtbr member
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    Quote Originally Posted by kuksul08
    bump
    I'm not sure if you're going by Pricepoints site, but if you have internal bearing ISIS cranks, that BB won't work. They are incorrect when they state it is an ISIS interface. That BB is a Howitzer interface, and not compatible with your current cranks. If you buy that, you'll need new cranks as well.
    Rosa Parks has just been hit with a piece of chicken.

  4. #4
    Meh.
    Reputation: XSL_WiLL's Avatar
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    The Howitzer interface is different than the ISIS interface. Not only that, but the outboard bearings will push the chainline way off. You don't have to have outboard bearing cranks to run a chainguide. You only need a e-type BB or a BB with a flange on the drive side so that you can sandwich the guide or adapter plate between the flange and the frame.

    All the MRP with the exception of the LRP are for use with single chainring.

    You get what you pay for, the e13s are nice.

  5. #5
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    Anyone have suggestions for a Howitzer external BB then?

  6. #6
    Meh.
    Reputation: XSL_WiLL's Avatar
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    You mean recommend a crank to fit the Howitzer BB? Holzfeller. Definitely.

    The Howitzer BB DOES NOT fit ISIS cranks.

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