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  1. #1
    Seņor Member 4Rings6Stars's Avatar
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    Can this bridge be drilled into a brake bridge? Modifying 1979 Bill Boston Tandem

    I recently picked up a tandem with Phil Wood disc brakes as the only braking system. I've read a bunch about them and posted a thread on C&V and I've learned it's not advised to use them as the only brake system (although on my short rides so far they have worked brilliantly). I've decided my best bet for now would be to see about adding modern dual pivot road calipers. The fork crown is already drilled and the rear bridge is the right distance from the rim (same as fork crown hole - 51mm) to use Tektro R737 / R539 or similar brakes.

    Can this bridge be drilled and a brake installed, either nutted or recessed, or would I need to have it reinforced? Or removed and replaced with a proper brake bridge?

    I'm hoping not to have to repaint... Other options are to have cantilever/v-brake mounts added or maybe even a modern disc tab added in the rear. I don't like cantilevers and I'm very fond of the BB7's on my Soma so if I can't make calipers work without major effort I would like to see about adding a modern disc to the rear.

    Also, I'm told it's standard 1979 Imron paint but can't seem to find information out there about matching it. Is my best option to go to a dupont paint dealer and have them photograph it and mix a blend to touch up as necessary? Would they be willing to do such a small quantity?



    Last edited by 4Rings6Stars; 09-17-12 at 08:33 PM.
    Independent Fabrication Planet X-DeSalvo Monstercross Disc-Soma DC Disc-Wicked Fat Chance
    Bill Boston Tandem-Centurion Cinelli-Raleigh Sports-WTB Phoenix ti-Hampsten Crema

  2. #2
    Randomhead
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    my only reservation is if he used silver for that, it's not going to hold up given the lack of fillet. I think you may be able to contact him, he was teaching people how to do fittings last I heard.

    What is the rear spacing? Is there any hope of putting modern disks on there?

  3. #3
    Seņor Member 4Rings6Stars's Avatar
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    Quote Originally Posted by unterhausen View Post
    my only reservation is if he used silver for that, it's not going to hold up given the lack of fillet. I think you may be able to contact him, he was teaching people how to do fittings last I heard.

    What is the rear spacing? Is there any hope of putting modern disks on there?
    That's a good idea, I will try to contact him.

    Rear spacing is 140. I'm told these phil hubs can have an adapter threaded on where the old disc brake was to accept a modern 6 bolt disc rotor.
    Independent Fabrication Planet X-DeSalvo Monstercross Disc-Soma DC Disc-Wicked Fat Chance
    Bill Boston Tandem-Centurion Cinelli-Raleigh Sports-WTB Phoenix ti-Hampsten Crema

  4. #4
    Randomhead
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    I never saw the phil disk brakes, I assume you can't mount a modern calliper without modifications. The spacing should be wide enough to fit something though

  5. #5
    Seņor Member 4Rings6Stars's Avatar
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    Quote Originally Posted by unterhausen View Post
    I never saw the phil disk brakes, I assume you can't mount a modern calliper without modifications. The spacing should be wide enough to fit something though
    Scroll down to the part on the brakes here. They don't operate at all like modern discs.

    http://classicrendezvous.com/USA/phil_wood_main.htm
    Independent Fabrication Planet X-DeSalvo Monstercross Disc-Soma DC Disc-Wicked Fat Chance
    Bill Boston Tandem-Centurion Cinelli-Raleigh Sports-WTB Phoenix ti-Hampsten Crema

  6. #6
    Seņor Member 4Rings6Stars's Avatar
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    Independent Fabrication Planet X-DeSalvo Monstercross Disc-Soma DC Disc-Wicked Fat Chance
    Bill Boston Tandem-Centurion Cinelli-Raleigh Sports-WTB Phoenix ti-Hampsten Crema

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