Author Topic: Geoid PM500 power meter  (Read 115171 times)

Lotnik

Re: Geoid PM500 power meter
« Reply #105 on: June 11, 2026, 04:17:41 AM »
Yeah on my gravel bike. 46T chainring
What chainring offset are you using and do you know the chainline for your setup?

ediryppah

Re: Geoid PM500 power meter
« Reply #106 on: June 12, 2026, 01:34:51 AM »
What chainring offset are you using and do you know the chainline for your setup?
No offset on the ring and the chainline is GRX 1by (whatever that is, I don’t remember)

zealot128

Re: Geoid PM500 power meter
« Reply #107 on: June 12, 2026, 05:19:17 AM »
Hey chat just wanted to share my experience so far with the PM500. Installed it a few weeks ago. Swapped out my 105Di2 crankset and it works flawlessly. I'm using the stock shimano 105 chainrings and they fit and shift perfectly. The big ring is not flush with the crank, not even close, but I don't care about looks/aero whatever, just function. Paired it to my Garmin watch and edge, calibrated via edge - seems to be accurate. I have about 200mi on it so far and it's been a joy. No complaints! I haven't tried to connect to the Magene app, just learned of that while reading through this thread. Cheers!
edit: forgot to mention, I picked it up on amazon for $171.71USD shipped. Absolute bargain for this thing.

Same setup with stock 105 chainrings that look .. interesting. (Passquest chainrings still shipping)

With Wahoo Elemnt Bolt also no problems setting up and calibrating, Numbers sounds plausible compared to previous 4iiii left side crank only/Tacx Neo, maybe a little bit higher than 4iiii (2nd best 20min time... on first ride) *could* be because of much shorter cranks fit me better, also had a good speed for that ride and felt spent.
My review aggreation site and Bike Builder: https://mybike.parts YT: https://youtube.com/@mybikeparts

HerbnLegend

Re: Geoid PM500 power meter
« Reply #108 on: June 13, 2026, 05:45:52 PM »
Same setup with stock 105 chainrings that look .. interesting. (Passquest chainrings still shipping)

With Wahoo Elemnt Bolt also no problems setting up and calibrating, Numbers sounds plausible compared to previous 4iiii left side crank only/Tacx Neo, maybe a little bit higher than 4iiii (2nd best 20min time... on first ride) *could* be because of much shorter cranks fit me better, also had a good speed for that ride and felt spent.

Are the passquest supposed to line up with the PM500?

zealot128

Re: Geoid PM500 power meter
« Reply #109 on: June 13, 2026, 06:11:41 PM »
Are the passquest supposed to line up with the PM500?

We'll see, but at least there are versions sold as such combo:
https://www.aliexpress.com/item/1005012320775072.html
My review aggreation site and Bike Builder: https://mybike.parts YT: https://youtube.com/@mybikeparts

ediryppah

Re: Geoid PM500 power meter
« Reply #110 on: June 15, 2026, 02:51:29 PM »
Are the passquest supposed to line up with the PM500?
Yeah I have pass quest chainring and it looks good.

zealot128

Re: Geoid PM500 power meter
« Reply #111 on: June 19, 2026, 03:22:58 PM »
Passquest arrived, color is hefty... Needs some getting used to it, but pairs nicely with the XG4 in the same color. Passquest is about 30g lighter than the same 105 chainring.



Regarding chain-line - I swapped with 105s cranks, did not adjust anything at all, and after a very quick ride i cannot feel any difference in shifting behavior, meaning it should be the same like the Shimano 105 -> FD-Shifting worked without issues for me.
So far, I like it, def. an upgrade to the 4iiii left-sided for the same price before. Now I have L/R-balance etc. as a new statistics and a better crank length.
As I previous wrote, in my first 2 rides I measured a bit more power than before (Strava: "2nd best 20m power"), but at that time I was also fastest since the last couple of months/year or so, maybe because of the shorter cranks that I ordered in the GEOID package, which allow me to pedal 100rpm+ without wobbling my bottoms.
Another big flip side for me: No app activation shenanigans, which might happened for me with other Magene stuff before, which I find a total downturner! Geoid: Install, Pair, Calibrate, Ride (maybe magene pm is the same, but their groupset, radar, head unit had this ...)
My review aggreation site and Bike Builder: https://mybike.parts YT: https://youtube.com/@mybikeparts

zealot128

Re: Geoid PM500 power meter
« Reply #112 on: June 27, 2026, 02:11:59 AM »
... and that's it, seems to be toast.
After a couple of rides, the PM just stop transmitting any Watts yesterday. It always shows "0 Watt" now both on head unit and also in the Magene Utility App. Cadence is still transmitting.
Calibration from Wahoo fails with generic error message.

I tried:

- Deleting/Reconnecting
- Recharging
- 5+ times rewind to zero offset

I did not ride anything of notice, no bad weather, maybe the only thing is heat, it's quite hot here in central Europe, and the bike is in a shat that might had 40ºC+ degrees yesterday.
Anyone has any idea? I just send a mail to support-geoid@geoidsports.com - but i don't have high hopes.





My review aggreation site and Bike Builder: https://mybike.parts YT: https://youtube.com/@mybikeparts

TheNamed

Re: Geoid PM500 power meter
« Reply #113 on: June 27, 2026, 11:22:01 AM »
I stumbled upon this Reddit post a while ago that had that exact issue with a Magene P515 and gave the steps that Magene support gave them to get it working again. I'd maybe try contacting Magene/GeoId support yourself first, but if no luck there then this might be worth a shot?

https://www.reddit.com/r/cycling/comments/1tcy55d/magene_pes_p515_stuck_at_0w_fix/

zealot128

Re: Geoid PM500 power meter
« Reply #114 on: June 28, 2026, 04:13:11 PM »
I stumbled upon this Reddit post a while ago that had that exact issue with a Magene P515 and gave the steps that Magene support gave them to get it working again. I'd maybe try contacting Magene/GeoId support yourself first, but if no luck there then this might be worth a shot?

https://www.reddit.com/r/cycling/comments/1tcy55d/magene_pes_p515_stuck_at_0w_fix/

Thanks for the link!
I tried the linked procedure couple of times, after sending "reset" it seem to disconnect, so I assume something does. I also tried it once using the charger attached, and the LED stopped blinking in that moment.

But after reconnecting with my Elemnt still Calibration fails, the problem persists. I will have to wait for the support, but my hopes are not very high :(
My review aggreation site and Bike Builder: https://mybike.parts YT: https://youtube.com/@mybikeparts

lorenzo

Re: Geoid PM500 power meter
« Reply #115 on: June 29, 2026, 04:05:43 AM »
I just send a mail to support-geoid@geoidsports.com - but i don't have high hopes.
Just a heads-up, the correct support email seems to be support@geoidsports.com

zealot128

Re: Geoid PM500 power meter
« Reply #116 on: June 29, 2026, 04:44:33 AM »
Just a heads-up, the correct support email seems to be support@geoidsports.com

I found the mail on their website, but already heard back from them, so both mails seem to work. I will report back after we tried some things.

EDIT:
They asked me, to try another head-unit to calibrate.. and what can I say.. with the iGPSport i830 it worked 2 out of 3 tries (Success, Changing crank length -> Calibrate -> FAILURE, Retry: Success). Really not sure what happened here, I will report back if they have any kind of reasonable explanation.
« Last Edit: June 29, 2026, 05:03:28 AM by zealot128 »
My review aggreation site and Bike Builder: https://mybike.parts YT: https://youtube.com/@mybikeparts

zealot128

Re: Geoid PM500 power meter
« Reply #117 on: July 02, 2026, 02:21:04 AM »
After 1 ride that had worked again with meaningful power output, yesterday, again "0 W".

Retried calibrating with iGPSports, in like 50% of cases it fails with "Calibration failed", the other cases appear to succeed but shows like a big "0" (it were different numbers last time, like 14 or so). Even though, the power output stays at 0W reported on both my head units.
I am in contact with their support, but so far not very helpful, as I previously reported, that using iGPSports calibration worked once, there were happy to close the ticket ignoring the complete unresponsiveness on Wahoo Elemnt's calibration.
My review aggreation site and Bike Builder: https://mybike.parts YT: https://youtube.com/@mybikeparts

xrider91

Re: Geoid PM500 power meter
« Reply #118 on: July 10, 2026, 08:28:34 AM »
Decided to pick one of these up in the most recent AliExpress sale - after cashback should come out to under USD120 delivered - crazy money. Plus another 30 or so for a pass quest chainring. I must say the presentation in the box is good, very well packaged. Looking forward to doing some comparisons vs Assioma duoshi, once I get the bike built up

Dulljoe

Re: Geoid PM500 power meter
« Reply #119 on: July 19, 2026, 06:20:30 AM »
Anyone installed the GEOID PM500 on a GRX 2by and got it working considering the chainline / FD?

Which affordable 46/30 110BCD chainrings did you use?