Advertise on Bikeforums.net



User Tag List

Results 1 to 10 of 10
  1. #1
    Senior Member flattie's Avatar
    Join Date
    Oct 2008
    Location
    Long Island, NY
    My Bikes
    Raleigh M20; Jamis Bosanova & timesharing a citibike
    Posts
    90
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Garmin GSC10 cadence magnet

    The cadence magnet for the GSC10 sensor that attaches to the crank on my bike has disappeared. It's the one that comes in a little oblong black plastic holder with a slot for the zip tie. I guess the zip tie wasn't snugged down enough and trying to clip in from a stop light I think I knocked it off.

    Anyway - does anyone know if you "must" use that specific magnet or can I use any old magnet in its place?

    I can get a 10 pack of 3/8th's sized rare earth magnets off amazon

    http://www.amazon.com/Rare-Earth-Mag...0993339&sr=8-3 for less than what they want for a single set of replacement magnets from garmin http://www.amazon.com/Garmin-Replace...0993400&sr=8-2


    Thanks.

    PS - Last thought - since a full GSC10 kit runs about $35 am I better off getting that to have a spare? Seems excessive - particularly since I don't ride in the rain unless I get caught out.
    Last edited by flattie; 07-18-11 at 06:53 AM. Reason: added another option/question

  2. #2
    Senior Member Shimagnolo's Avatar
    Join Date
    May 2008
    Location
    Zang's Spur, CO
    Posts
    6,357
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Buy 1/2" magnets, then stick them to the back of your pedal spindle.
    Stack them high enough to get close enough to trigger the GSC10.
    Note that of course you need a steel spindle for this to work.
    I do this on all 4 of my bikes.
    No more ugly zip ties and plastic bits.

    I use these: http://unitednuclear.com/index.php?m...7a9a2a8994214d

    When removing the magnet stack, you will need to hold a large chuck of steel against the bottom magnet on to pull it off of the spindle. The side of a large crescent wrench works well.
    Last edited by Shimagnolo; 07-18-11 at 07:13 AM.

  3. #3
    Senior Member sojourn's Avatar
    Join Date
    Apr 2007
    Location
    San Marcos, CA
    My Bikes
    Madone 6.2
    Posts
    826
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Go with the rare earth magnets. I switched over to the rare earth magnets many moons ago and they work great...look better too IMHO.
    Ride safe-

  4. #4
    Senior Member flattie's Avatar
    Join Date
    Oct 2008
    Location
    Long Island, NY
    My Bikes
    Raleigh M20; Jamis Bosanova & timesharing a citibike
    Posts
    90
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks for the quick responses. I'm pretty sure my cranks are aluminum. They are the FSA Vero Forged. So if I go with the rare earth magnets do you think double sided tape, hot glue or epoxy adhesive would work okay?

    Edit: I need to read more carefully - Shimagnolo suggested attaching them to the back of the pedal spindle. Those I believe are steel - I'll need to go home and see if that's a viable mounting location. I'm somewhat restricted as to where the GSC10 is mounted since I have disc brakes and the brake cable runs along the chainstay not to mention the avid bb5's are mounted there. Presently the GSC10 is mounted "upside down" or it's hanging from the underside of the chainstay. Not sure how far rearward I can move it.
    Last edited by flattie; 07-18-11 at 07:23 AM. Reason: added clarifying remarks

  5. #5
    Senior Member Shimagnolo's Avatar
    Join Date
    May 2008
    Location
    Zang's Spur, CO
    Posts
    6,357
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Not the crank, the *spindles*.
    They are likely steel unless you spent the big bucks for Ti.

  6. #6
    Senior Member flattie's Avatar
    Join Date
    Oct 2008
    Location
    Long Island, NY
    My Bikes
    Raleigh M20; Jamis Bosanova & timesharing a citibike
    Posts
    90
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Shimagnolo View Post
    Not the crank, the *spindles*.
    They are likely steel unless you spent the big bucks for Ti.
    Yeah I edited my response - guilty as charged for not reading your original reply carefully enough. What you suggest is what I am going to try tonight when I get home. I have shimano m540 spd pedals which do have steel spindles. Thanks very much.

  7. #7
    Newbie
    Join Date
    Sep 2010
    Posts
    4
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    go to http://www.geomangear.com look under garmin. A replacement magnet set is $9.99

  8. #8
    Senior Member chasmm's Avatar
    Join Date
    May 2010
    Location
    Long Island, NY
    My Bikes
    '85 Rossin Super Record, '88 Specialized Sequoia, '10 Raleigh Cadent FT2, '10 Specialized Roubaix Elite
    Posts
    1,599
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Here's a link to my post on the Garmin forums where I did this and posted some pics of it...Using a rare-earth (neodymium) magnet to replace the GSC-10 crank-arm magnet

    I done this on all my bikes and haven't had an issue yet. As I mention in my post, I would try to get the magnets that have a hole in the center...they're much easier to remove...

    Good luck

    Make a donation or just check out my blog. Every little bit counts!
    http://main.diabetes.org/goto/charlesmmorgan

  9. #9
    Senior Member Looigi's Avatar
    Join Date
    Dec 2010
    Posts
    7,293
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Yep. Like others I use a 3x12mm rare earth magnet stuck to the inside end of the pedal spindle. Works well on three different bikes. It'll trigger the sensor from well over 2 cm away. I find them easy to slide off when needed.

  10. #10
    Bike ≠ Car ≠ Ped. BarracksSi's Avatar
    Join Date
    Jul 2007
    Location
    Washington, DC
    My Bikes
    Some bikes. Hell, they're all the same, ain't they?
    Posts
    13,857
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I don't think I'll own enough bikes to use up the package of rare earth magnets I got from the hardware store, so when I sold my CAAD8, I just left the magnet glued on the crank.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •