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A better method for candence magnet mounting?

Jun 16, 2009
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Why is it that we have to do the messy tape and cable-tie method to mount a magnet on the crank for cadence measurement? Wouldn't it be great if you could lock your cadence magnet into the back of the crank by screwing it into the pedal mounting thread? There is normally spare thread available there to do it.

Surely someone has thought about the potential for using the fitting for the pedal axle? (I think Campag did that around 10 years ago but don't seem to now?).

one option would be that companies like Look and Speedplay offer a threaded pedal axle and their own brand magnet to fit into it.
 
Sep 30, 2009
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if you have hollow spindles, then you can glue in a rare earth magnet. Some comps need the proprietary magnet that comes with the harness to work properly, but most will work with a REM.

Personally, for me, a lil dab of glue and a zip tie has always worked and seemed sensible enough for me. A lot easier to move/remove if need be.
 
Magnets are...magnetic

I use a standard 1/4" or 3/8" magnet you can get at any craft store attached to the back side of the pedal spindle on the wife's bike. Just good old magnetic forces holding it in place. Hasn't fallen off in years.

For bikes with real fat chainstays (Cannondale) this method won't work. Campy did (does) make a small magnet that fits in the hole in the spindle. Problem is I think they want $15 or so for them retail.
 
Jun 16, 2009
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steelciocc said:
Campy did (does) make a small magnet that fits in the hole in the spindle. Problem is I think they want $15 or so for them retail.

Thats the thing that made the most sense (although not at that price!). I just assumed that Campy had stopped supplying them as hadnt seen one in over 10 years I think.

EDIT: A further look showed that while they do, they still only fit Campag pedals as they are pedal specific rather than using the remaining thread in the crank in the manner I suggested.
 
Mar 10, 2009
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I use ShoeGlue and stick the magnet on the left crank arm by the pedal axel, my pedal axel is not magnetic, you can guess the metal. Works perfectly and is removable with no mess or residue/marks in case you want to remove it for any reason.
 
Aug 4, 2009
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Beware of epoxy glue on carbon cranks it may eat into the carbon.

I melted the threads on mine just inside wher the pedal fits. but liquid nails works OK
 
Mar 10, 2009
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Martin318is said:
Why is it that we have to do the messy tape and cable-tie method to mount a magnet on the crank for cadence measurement? Wouldn't it be great if you could lock your cadence magnet into the back of the crank by screwing it into the pedal mounting thread? There is normally spare thread available there to do it.

Surely someone has thought about the potential for using the fitting for the pedal axle? (I think Campag did that around 10 years ago but don't seem to now?).

one option would be that companies like Look and Speedplay offer a threaded pedal axle and their own brand magnet to fit into it.

I've been using the one that comes with Mavic computers for 2 years. It has some super sticky double-sided tape on it that sticks to the pedal spindle. I use this with my powertap cadence sensor and it works perfectly.
 
Jul 27, 2009
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I used a magnet out of one of those tacky fridge magnets people put on their fridges, it fits perfectly inside the step down to the pedal axle and no glue is needed. It's been on there about 7 months now.

Cost $3