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 Post subject: Mounting a Mavic bracket
PostPosted: Wed Oct 20, 2010 11:10 am 
Retro Guru
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Joined: Thu Nov 09, 2006 10:51 pm
Posts: 557
Location: Melrose, Borders
I found a nice Mavic bracket I would like to use. It is not threaded, but uses a smooth aluminium shell that is locked on the outside of the bracket shell. Installation requires that your bracket shell is re-faced at a 45deg angle. Does anyone know if there a still bike shops that can do this?


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 Post subject:
PostPosted: Wed Oct 20, 2010 2:24 pm 
The Guv'nor
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Good lcuk, be interested to know how you get on.


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 Post subject:
PostPosted: Wed Oct 20, 2010 3:43 pm 
King of the Skip Monkeys
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Location: Moomin Valley
if you still have the plastic washers, your frame wont need any work.


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 Post subject:
PostPosted: Wed Oct 20, 2010 3:43 pm 
Old School Grand Master
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Joined: Wed Feb 20, 2008 12:21 pm
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Location: Lost in Translation
The Schlumpf Mountain Drive bottom bracket gear needs the same chamfer, so a Schlumpf dealer should be able to do it for you. Ben Cooper at Kinetics is a Schlumpf dealer more-or-less in your part of the world:

http://www.kinetics.org.uk/

http://www.kinetics.org.uk/html/mountain_drive.shtml


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 Post subject:
PostPosted: Wed Oct 20, 2010 9:34 pm 
Retro Guru

Joined: Mon Feb 01, 2010 8:57 pm
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If you can't find a shop with the right tool, an engineering machine shop should be able to jig-it-up on a milling machine - having used one, I wouldn't trust using one on a shell without the chamfer or Loctite on the threads


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 Post subject:
PostPosted: Sat Oct 23, 2010 2:01 pm 
Retro Guru

Joined: Mon Jan 15, 2007 12:12 am
Posts: 1513
Location: Gold Coast Australia
Don't do it ,will ruin the frame for anything else , just get the length axle you need in any other brand !!

http://www.ribblecycles.co.uk/pp/road-t ... -Road/BTBR
http://www.wiggle.co.uk/c/cycle/7/Bottom_Brackets/
http://www.totalcycling.com/index.php/p ... index.html


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 Post subject:
PostPosted: Sat Oct 23, 2010 2:33 pm 
Old School Grand Master
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Joined: Wed Feb 20, 2008 12:21 pm
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Location: Lost in Translation
latman wrote:
Don't do it, will ruin the frame for anything else

A normal cartridge bottom bracket will work fine on a frame that's been milled for the MAVIC unit. The milling removes at most a couple of threads from each side, and still leaves a regular surface for the flange of a conventional fixed cup to bear against.


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 Post subject:
PostPosted: Sat Oct 23, 2010 5:16 pm 
rBoTM Winner
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Joined: Sat Aug 28, 2010 3:44 pm
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Location: at my computer
one-eyed_jim wrote:
latman wrote:
Don't do it, will ruin the frame for anything else

A normal cartridge bottom bracket will work fine on a frame that's been milled for the MAVIC unit. The milling removes at most a couple of threads from each side, and still leaves a regular surface for the flange of a conventional fixed cup to bear against.


At least that is how it should work... I had a Mavic bracket fitted to a bike for over 25 years and likely 50K miles. When I removed it, the threads had been "squished" quite a bit. I needed to chase the threads to be able to fit threaded cups, but once chased, it was usable. The chamfer is in fact so narrow that you shoudl indeed be able to use other cups without major difficulties.


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 Post subject:
PostPosted: Sun Oct 24, 2010 12:05 am 
Gold Trader
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Joined: Wed Jun 20, 2007 11:19 pm
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Location: Odense, Denmark
I think this thread should be made a sticky. Been after this info for years.


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 Post subject:
PostPosted: Fri Oct 29, 2010 1:49 pm 
retrobike rider
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Joined: Tue Jan 29, 2008 11:04 pm
Posts: 1800
Location: A wretched hive of scum and villainy...
I have a Schlumpf 45 degree tool,

Image

I'd be able to lend it out with some sort of deposit scheme...

Interested?


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