Mounting a Mavic bracket

Spikes · Oct 20, 2010

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?

john · Oct 20, 2010

Good lcuk, be interested to know how you get on.

legrandefromage · Oct 20, 2010

if you still have the plastic washers, your frame wont need any work.

one-eyed_jim · Oct 20, 2010

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

monty dog · Oct 20, 2010

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

latman · Oct 23, 2010

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

one-eyed_jim · Oct 23, 2010

latman":26q0epz9 said:
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.

Citoyen du monde · Oct 23, 2010

one-eyed_jim":1t1fo2wc said:
latman":1t1fo2wc said:

Don't do it, will ruin the frame for anything else

Click to expand...

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.

dbmtb · Oct 24, 2010

I think this thread should be made a sticky. Been after this info for years.

danson67 · Oct 29, 2010

I have a Schlumpf 45 degree tool,

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

Interested?

Mounting a Mavic bracket

Spikes

Retro Guru

john

The Guv’nor

legrandefromage

one-eyed_jim

Old School Grand Master

monty dog

Senior Retro Guru

latman

Senior Retro Guru

one-eyed_jim

Old School Grand Master

Citoyen du monde

dbmtb

danson67

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