Garmin's new magnetless sensors
 

I've been holding of getting speed and cadence sensors on my tandem but I just saw that Garmin now has magnetless sensors. The speed sensor simply wraps around a hub and the cadence sensor wraps around a crank arm. The cadence sensor seems like a great product for tandems, simply attach it to the captains crank without the timing chain. Anyone using these yet?

http://bikeforums.net/attachment.php...hmentid=389526

I've been using the new speed sensor on the rear hub of my single bike for the last two weeks. It's worked flawlessly with my Garmin, and it's nice not having a magnet and pickup that keep going out of line.

The new sensor should be transmitting with ANT+, but unfortunately the second computer that I sometimes use, a Pro Scio model, which is also ANT+, doesn't pick up the hub-based sensor. The other computer worked fine with the old Garmin sensor and a BBB ANT+ sensor, so I'm not sure what the problem is. As I said, when using it with the Garmin computer I've had no issues at all.

We have been using these sensors for a couple months now on both our tandem and my single, and with 2 Edge 800s and one Edge 500, with mixed results.

The speed sensor seems to cut out (repeated Auto Stop / Auto Start) on occasion - does not matter where it is mounted, front or rear. Oddly, the issue seems to occur most frequently when we stop pedaling. I suspect there is a software glitch in the way Garmin handles the separate ANT+ sensor signals and when the cadence sensor indicates Zero, the Speed sensor at the head units also goes to zero. At other times, the speed sensor issue will happen when simply riding along smoothly and no apparent relation to a particular speed.

I've called Garmin Support to discuss the issue, but they have no answer and "never heard of that issue before". Since we can reproduce the issue with multiple head units, sensors and bikes, doubtful the problem is at our end (yes, using latest firmware version on all head units). The sensor(s) transmission range does appear to be very good... I've tested this to work from over 20ft away, but as mentioned above, mounting the speed sensor on the front wheel just under the head unit does not remedy the issue.

The issue seems to have improved slightly after I ensured all previous Spd/Cad sensor Ant IDs were wiped out of the head units, then resyncing with the new separate Speed + Cad sensor IDs. However there are still times when the speed does an Auto Stop / Auto Start cycle.

Never had a single problem with the original GSC10 Spd/Cad combo sensor.

We are using these, and think they are great. I'd always have the wheel magnet come loose and start clicking for some reason. Now we don't have to think about it, and if there is a noise, we know its not the magnet knocking.

i dont ride a tandem, but i have these sensors and now i will never ever go back to magnet sensors. they work flawlessly.

Garmin's new magnetless sensors
 

Two cycle, we've been using it for six weeks or so, along with cadence coming from Vector pedals.

Just this Sunday it started the a auto pause bit. Only stopped by telling the Garmin no speed sensor was present

Right. Has to be a software glitch in the Edge units. Which model do you have?

Initially this was happening very frequently on both our tandem (Edge 800s) and my single (Edge 500), but after clearing all profiles of the previous spd/cad Ant ids, rebooting, then resyncing to the new separate speed and cadence ids, the issue occurs only occasionally now. I have a suspicion it may be a Ant lookup table issue, and possibly influenced by the order of which the Ant devices are first synced.

These sensors came packaged with the Edge 1000. So far, I have not had any problem with the bluetooth syncing or drop signal with this setup. Not having to worry about a misaligned sensor unit on the fork or magnet on the spokes is a big plus.

On another note, the Edge 1000 along with the D-Fly unit add a very nice feature for tandems - gear indicator. So nice to have that information in front of me for multiple shifting on the hills.

CJ

Tell us more about the gear indicator?
R&J

Rod,
Here is the picture of the Edge 1000:

http://bikeforums.net/attachment.php...hmentid=401430

The gear indicator is on the top line.
It is a nice convenient feature, but it is absurdly expensive for what it does.
You need a DI2 system and an extra D-Fly wireless unit to get it to work.
If I was an engineer, looking for the best and most efficient way to develop this unit, it would be a wired computer in place of the front junction box. That set up would have made a whole lot more sense than the current wireless unit. Indeed, Shimano was originally working on such a unit. The project got killed probably because it could not generate the revenue the current system could.
If I had a do over, I would not.
CJ

Cool gaget, but as you said... still expensive at $600. I really do want a gear display of some sort.

The new 11spd Mtn Di2 group has a combo front junction box / gear indicator screen. Hopefully it is compatible with the current road Di2 (non-synchro). It might be a nice addition to our setup.

I can agree, cool but pricey, you did satisfy my curiosity though, Thanks
R

FWIW, some ANT+ computers only work with combo wheel/cadence sensors, like the GSC10, and not individual wheel and cadence sensors. IDK for sure, but this might be the case with your Pro Scio.

Here's a pretty thorough review of these sensors and their compatibility with Garmin and some other devices. A look at Garmin?s new ANT+ Speed & Cadence magnet-less sensors | DC Rainmaker

Installed these yesterday along with a refurbished Edge 500. Followed the tips on some Amazon reviews to get the speed sensor working. Once I got that led to light up, it found both sensors easily. Very impressed so far with the combo.

I'm running Di2 on my single bike and have the wireless transmitter so that my Edge 1000 can display gear info and battery level, which is a feature that I absolutely love. As far as other options for displaying the gear, I've heard that the Alfine Di2 display unit works with Ultegra and Dura Ace systems, and it has a readout showing just the rear gear position. From what I read, it sounded like you just plug it into the system and it would work immediately, so there is no need to wait for the XTR version.

I have now buy for my second bike the magnet-less speed, cadence sensors and have the problem with auto pause / auto resume, have somone found a solution to fix this?
I have the edge 500(3.30.00) and on my first bike the GSC-10

Same with me. Glad I'm not the only one. Hopefully Garmin comes out with a fix.

Our Garmin units (2 - 800s, and a 500 on my single) seem to be working much better now after performing the steps I noted in post #7 above. Now only very seldom "Auto Pause" occurring, which still seems to be triggered when we stop pedaling (cadence sensor goes to zero).

I have try to reset the edge to factory settings and still the same problem, than i have write to garmin and the answer its like yours on the post#7 .... "never heard of that issue before" :P
But have add the solution to reset the garmin device to factory reset and to remove the battery from cadence and speed sensor for 5min and then tray to connect again

I just bought two of these. Same thing is happening to me. Edge 800 is routinely auto-pausing. I have two of them and one auto-pauses less frequently than the other, but still 10-15 times per 50 mile ride. The really bad one does it every 10-15 seconds. Any solutions other than reset and repair?

I have a teammate that has an 810 and says he has no issues.

Based on your username, I'd think a Bontrager DuoTrap would be a better fit.

I use an Osync head unit with a cadence sensor on my right front crank. I have not had pausing on the cadence using this sensor so I think you are correct that it is a Garmin software issue. We use an old fashion magnet speed sensor. I change wheels much more often than I change cranks so I like having a magnet on each wheel and one speed sensor on the bike.

"never heard of that problem before" I have heard that before!

Ok, this is really weird. I can reproduce the Auto Pause / Resume issue at will using the new Garmin sensors and my Edge 500 on my single. This is how...

Any time I cross a steel girder bridge here in Tucson the Auto Pause occurs. This is true on road bridges or cycle/ped bridges along the "Loop Path" (river or northwest). If the bridge is long enough, the Auto Pause / Resume will happen multiple times while I'm crossing. The issue rarely occurs on normal roads and has nothing to do with road texture (ie: vibrations, potholes, or silky smooth). Go figure. So bizzare.

Sorry, to bump this old thread, but like twocicle, I noticed it happens consistently on bridges. Every joint I hit, it'll auto pause. Over 20 times on a bridge, at every single joint. But it also happens on bad bumps on the road. Never happens while riding around, pedaling or not. Magnetless speed sensor on rear wheel, Quarq for cadence. Any one find out anything new?

Since you brought up this old thread. I wonder if Garmin has "heard of the problem" yet?