Need help: Specialized Langster foot brake

Discussion in 'Singlespeed' started by AndreasJensen, Jun 20, 2012.

  1. AndreasJensen

    AndreasJensen New Member

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    Hallo single speed geniuses

    I have a Specialized Langster 2012 and would like to have foot brake (used fixie for a while but dosn't feel save in the city). My local cycle mechanic told me that it was impossible because of the frame. But I believe nothing is impossible. Does any one know a possible solution??

    Thank you in advance and I love the forum.

    Regards
    Andreas
     
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  2. alfeng

    alfeng Well-Known Member

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    You CAN have a rear wheel laced up with a COASTER BRAKE hub ...

    But, there is more internal resistance in a Coaster Brake hub than in a regular hub which is properly adjusted AND a Coaster Brake hub will feel as though it weighs-a-ton.

    Of course, you can add a rear brake to most frames if you want a rear brake ...

    • Since the Specialized Langster is not a "true" Track bike (AFAIK, that is), it probably has a brake mounting hole ... if there isn't a brake mounting "hole" then you can drill one ... just measure carefully for the brake's reach since you will need to MOVE the pads up-or-down when the wheel is mounted in a different place (this is true for all horizontal Track "dropouts") if-and-when you change the cog's tooth count + you will (probably) want to enlarge the forward facing portion of the hole to allow a recessed nut to nest properly.

    BTW. I haven't seen any 32h Coaster Brake hubs, but I haven't really looked.

    You can lace a 36h hub with only 32 spokes, but I think you will not be able to use a spoke calculator + you may need two-or-three different length spokes ... it won't be as tedious as that sounds ...

    Of course, you can just use a rim with the same number of holes as the hub has.
     
  3. AndreasJensen

    AndreasJensen New Member

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    Dear alfeng

    Thank you for the quick respons. I am sorry but I was a little imprecise in my question above. My cycle mechanic says that a coaster brake is not possible on this particular bike frame, because the brake arm cannot easily be attached to the frame. The frame has a special design, so the arm must have a wider angle outwards and that will destroy the coaster brake (and maybe the frame).

    Fortunately the cycle already has a back brake, so it is possible for me stop at the moment, but I want to get rid of the hand brakes :)
     
  4. alfeng

    alfeng Well-Known Member

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    FWIW. If I understand the "problem" ...

    Either YOU or your mechanic simply needs to add a SPACER (e.g., an axle "spacer" with whatever the appropriate offset is OR a "block" of aluminum-or-wood-or-whatever with an appropriate diameter hole drilled in it, etc.) which will be sandwiched by the Coaster Brake's "arm" & the P-clamp band (a semi-custom P-clamp band if the stay's diameter is too large for an out-of-the-package P-clamp) ... secure with an appropriate length bolt + star washer + nut ...

    • OR, you can just bend a semi-custom band which dog-legs over to where the Coaster Brake's arm is located -- you can make the band from whatever width (3/8"?, or wider ... wider will be better because it will distribute any stress on the stay across a greater amount of the stay) BRASS sheet (¿1/32" thick?) OR cut a band from a tin can (remember to finish the edges with a file + emery cloth TO PROTECT YOURSELF & THE FRAME'S STAY!!) ... use a piece of inner tube between the band & stay (to further protect the stay) ... make a template from some cardboad, first.

    I hope that makes sense.

    If not, then I can cobble up an example ... but, I don't know when I can get around to doing it.
     
  5. AndreasJensen

    AndreasJensen New Member

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    Thanks for the respons. I told my mechanic - what you wrote - and he reluctantly began to accept that it was possible. I am no mechanic my self so he needs to do it. But he will give it a shot.

    Thank you again for your time and help.

    :)

    Andreas
     
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