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Plug and Play Connectivity

Part Number: GEMRETRO-A

GEMRetro is a Bluetooth Retrofit solution for select CSAFE enabled fitness equipment. GEMRetro adds the ability to broadcast your workout data from compatible fitness equipment to apps like Zwift via Bluetooth. See below for confirmed equipment that works with GEMRetro.

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1 Year

Compatible with the apps and devices you love.








GEMRetro is a plug and play Bluetooth connectivity solution for CSAFE enabled fitness equipment allowing realtime tracking of workout performance with smartphones, tablets, and group fitness leaderboard software. GEMRetro integrates with CSAFE enabled cardio equipment including, treadmills, stationary bikes, steppers, step mills/stair mills, ellipticals, total body trainers, tread climbers, and rowers.

  • GEMRetro ships in Treadmill mode and is ready to go on compatible treadmills out of the box
  • GEMRetro is configureable to compatible equipment via the GEM Retro Util app. For access to the GEM Retro Util app, please email
  • GEMRetro does not currently broadcast ANT+ data
  • GEMRetro does not include heartbeatz functionality
The Gem Retro is Confirmed to work with the following consoles:
Life Fitness Discovery, Integrity SL, Engage, Explore
Woodway 4Front, Path, Some versions of Desmo
Precor P30, M9.33
Octane Smart, Standard
StarTrac All models EXCEPT Series 4 Commercial
Technogym Excite 900
Ship-to Countries

United States, Canada, EU Countries, United Kingdom, Estonia

Warranty Information

12 Month Limited Warranty: North Pole Engineering will, at our option, repair or replace any product found defective in manufacture within the warranty period. The warranty period determines the initial online registration.  Read more...

Customer Reviews

Based on 5 reviews
GEM retrofit

Works perfect. So much better than dealing with foot pods

dave campbell
GEM retro

I purchased the GEM to use on my Life Fitness Club Treadmill with a safe port. I connect it to zwift run. Compared to all the other others, the gem is flawless! Never need to worry about power, warmup, accuracy compared to treadmill
speed, etc. It just works!! I feel sorry for the folks who spend tons of money on a home treadmill with a fancy display. They could have spent less and got a gym quality treadmill like the LF club and connected the GEM and be off and

dave campbell
GEM retro

I loved the module so much, I have now purchased 4 of them to install into the safe port on my 4 life fitness club treadmills. This is the only way to use with zwift since it provides a100% stable never have to think about it interface!!!

John p McFarlane
NorthPole/Wahoo GEM

Works perfectly with my Lifefitness 95!

Works but not the game changer I was hoping for

Once you get the GEM Retro configured it does send basic info such as pace and incline to apps like Zwift. I bought this product with expectations that it would be able to control the incline from Zwift as well, meaning that if the course
starts to climb on Zwift the treadmill would increase the incline as well. This does not happen. I read an early review from a trusted reviewer (DC Rainmaker) stating that this module would allow incline control so I'm a bit disappointed and
it's unclear who, Zwift or NPE, could make this happen. Setup is unclear and there are no instructions in the box. I had to search the web, eventually finding a pdf that walked me through the process. Honestly, I believe a Garmin Foot Pod
would do nearly everything that this does at half the price.
NP Response:
Hi Brian,
I apologize for the issues you've experienced. One of our GEM engineers will be contacting you shortly to help with the questions you have.
Here is some information that may clear some things up:
1) First and foremost, Zwift didn't implement equipment control in their software for treadmills. Also, only a few brands allow equipment control through the SAFE port.
2) We will update our store site to make clearer instructions for these treadmill and bike units.
3) Regarding DC Rainmaker's article, we did have him correct this statement a few years ago when the review was originally posted. It is a footnote in the article so may have been missed by the reader.
Thank you for bringing your concerns to our attention. We will update our website to help provide better instruction for our customers.

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