Cycling Equipment · Public discussion

Fitting Magura rim brakes to bike without bosses.

Started by Andrew W · · Last activity · 9 posts · 580 views

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Cycling Equipment
Published
28 August 2006
Last activity
2 September 2006
Original author
Andrew W
Posts
9
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  1. I note that SJS cycles have a bracket which I presume is for this
    (http://tinyurl.com/g8np3).

    I am planning to add HS11 brakes to my Brompton to sidestep problems
    with poor braking (ends of cables point up at the brake, so water gets
    in and causes problems, poor cable routing). A hydraulic brake looks
    like a good solution.

    Does anyone have any experience with these brackets? I can't find any
    information about them other than the picure on the URL above.

    I notice that the Magura site doesn't list them, so presumably they are
    NOS items, does this indicate any problems leading to them being
    discontinued?

    The fork I want to use them with is quite narrow (Brompton front wheels
    are 90mm OLN), is this likely to cause any problems?

    I presume the measurement is the drop from the mounting bolt to the
    bosses?

    Andrew

  2. "Andrew W" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    I note that SJS cycles have a bracket which I presume is for this
    (http://tinyurl.com/g8np3).

    I am planning to add HS11 brakes to my Brompton to sidestep problems
    with poor braking (ends of cables point up at the brake, so water gets
    in and causes problems, poor cable routing). A hydraulic brake looks
    like a good solution.

    Does anyone have any experience with these brackets? I can't find any
    information about them other than the picure on the URL above.

    I notice that the Magura site doesn't list them, so presumably they are
    NOS items, does this indicate any problems leading to them being
    discontinued?

    The fork I want to use them with is quite narrow (Brompton front wheels
    are 90mm OLN), is this likely to cause any problems?

    I presume the measurement is the drop from the mounting bolt to the
    bosses?

    Andrew

    This part looks like the bracket I have on my old HS22 and will indeed allow
    you to fit to an ordinary bridge bolt.
    I am a little unsure if the hose will tolerate all the bending and twisting
    involved with the B. Best to contact Magura via their web forum and see
    what they say.

    SW

    Quoted message said:
  3. BTW please let us know how the conversion goes if you go ahead.
    Perhaps post the result on [email hidden]
    E-mail Address(es):
    [email hidden]

  4. "Andrew W" <[email hidden]> a écrit:

    Quoted message said:

    I am planning to add HS11 brakes to my Brompton to sidestep
    problems with poor braking (ends of cables point up at the brake,
    so water gets in and causes problems, poor cable routing). A
    hydraulic brake looks like a good solution.

    Quoted message said:

    Does anyone have any experience with these brackets? I can't find
    any information about them other than the picure on the URL above.

    I don't have experience with those brackets.

    Have you considered having 4-bolt (trials) mounts brazed to the fork and
    rear triangle? They're the lightest and most rigid option for mounting
    Magurae, and I'd more or less decided on this upgrade prior to the theft of
    my own Brompton.

    Quoted message said:

    The fork I want to use them with is quite narrow (Brompton front wheels
    are 90mm OLN), is this likely to cause any problems?

    I think the Brompton front hub is narrower still - 74mm if I remember
    correctly.

    James Thomson

  5. Steve Watkin said:

    "Andrew W" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    I note that SJS cycles have a bracket which I presume is for this
    (http://tinyurl.com/g8np3).

    I am planning to add HS11 brakes to my Brompton to sidestep problems
    with poor braking (ends of cables point up at the brake, so water gets
    in and causes problems, poor cable routing). A hydraulic brake looks
    like a good solution.

    Does anyone have any experience with these brackets? I can't find any
    information about them other than the picure on the URL above.

    I notice that the Magura site doesn't list them, so presumably they are
    NOS items, does this indicate any problems leading to them being
    discontinued?

    The fork I want to use them with is quite narrow (Brompton front wheels
    are 90mm OLN), is this likely to cause any problems?

    I presume the measurement is the drop from the mounting bolt to the
    bosses?

    Andrew

    This part looks like the bracket I have on my old HS22 and will indeed allow
    you to fit to an ordinary bridge bolt.
    I am a little unsure if the hose will tolerate all the bending and twisting
    involved with the B. Best to contact Magura via their web forum and see
    what they say.

    SW

    Quoted message said:

    I don't know if the plastic hose will be OK (it might well be), but
    Magura also do braided steel tubing which I'm fairly sure would be up
    to the job.

    Since you have experience of this, can you help with the second part of
    my query, how do I measure the bracket length I need? How far below
    the rim should I allow for the bracket length?

    Andrew

  6. Andrew W wrote:
    how do I measure the bracket length I need? How far below

    Quoted message said:

    the rim should I allow for the bracket length?

    The vertical dimension is measured centre of mounting hole-centre of
    brakeblock

    --
    ---
    Marten Gerritsen

    INFOapestaartjeM-GINEERINGpuntNL
    www.m-gineering.nl

  7. M-gineering said:

    Andrew W wrote:
    how do I measure the bracket length I need? How far below

    Quoted message said:

    the rim should I allow for the bracket length?

    The vertical dimension is measured centre of mounting hole-centre of
    brakeblock

    --
    ---
    Marten Gerritsen

    INFOapestaartjeM-GINEERINGpuntNL
    www.m-gineering.nl

    Thanks, I was thinking it would be down to the brake bosses.

  8. M-gineering said:

    Andrew W wrote:
    how do I measure the bracket length I need? How far below

    Quoted message said:

    the rim should I allow for the bracket length?

    The vertical dimension is measured centre of mounting hole-centre of
    brakeblock

    --
    ---
    Marten Gerritsen

    INFOapestaartjeM-GINEERINGpuntNL
    www.m-gineering.nl

    Thanks, I was thinking it would be down to the brake bosses.

  9. Steve Watkin said:

    BTW please let us know how the conversion goes if you go ahead.
    Perhaps post the result on [email hidden]
    E-mail Address(es):
    [email hidden]

    Well, I've done it.

    Magura "A" type U bracket (from SJS cycles) fits to the Brompton nicely
    (once I'd worked out that the little plastic wedges at the bottom back
    edge needed to be rotated ninety degrees to brace against the forks.

    The rest was very straightforward. I've transferred my HS33's for the
    time being. I've only had time for a short test trip, but the braking
    is now incomparably better than with the old Brompton brakes.

    I've not clipped the hose to the frame, and organised it so that it
    curves in a wide loop when the bike is folded - only time will tell
    whether this aspect will prove satisfactory (i.e. if the hose is up to
    it).

    I don't fold it that often anyway. Last weekends 50 mile out trip
    followed by return in a car is more typical of the sort of riding I do
    on it (though usually 20-30 miles rather than 50).

    I'll add more after I've put a few hundred miles on the clock.

    Andrew

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