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🚀 Upgrade your treadmill, upgrade your run — don’t get left behind!
The Runn Retrofit Smart Treadmill Sensor is a compact, rechargeable device that converts any treadmill into a smart fitness machine by broadcasting speed, incline, and cadence data via Bluetooth and ANT+. Compatible with popular apps like Zwift and Peloton, it supports Apple Watch heart rate integration and offers up to 15 hours of battery life, making it the perfect tool for millennial professionals seeking connected, data-driven workouts at home.





| ASIN | B0CFWNX4L6 |
| Additional Features | ANT+, Bluetooth |
| Best Sellers Rank | #128,574 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #399 in Treadmills |
| Brand Name | North Pole Engineering |
| Color | Black |
| Connectivity Technology | ANT+, Bluetooth |
| Customer Reviews | 3.4 3.4 out of 5 stars (67) |
| Frame Material Type | Plastic |
| Global Trade Identification Number | 00860009132900 |
| Included Components | Charging Cable, Mounting Hardware, Runn, Sensor Strips |
| Is Assembly Required | No |
| Item Dimensions D x W x H | 3.63"D x 3.75"W x 2"H |
| Item Type Name | Treadmill Retrofit Sensor |
| Item Weight | 3.5 Ounces |
| Manufacturer | North Pole Engineering |
| Material Type | Plastic |
| Maximum Incline Percentage | 15 |
| Maximum Weight Recommendation | 240 Pounds |
| Metrics Measured | Speed, Treadmill Incline, Running Cadence |
| Model Name | Runn Smart Treadmill Sensor |
| Model Number | Runn |
| Number of Programs | 15 |
| Power Source | batteries, Micro-USB |
| Product Benefits | Indoor Run or Walk Tracking, Virtual Training Connection for non-smart Treadmills |
| Product Grade | New |
| Recommended Uses For Product | Indoor Running, Indoor Walking, Walking Treadmill Desk |
| Target Audience | Adult |
J**S
Works As Designed
Works as intended and pairs well to android device. Used B7000 glue to help reflective tabs stay secured to treadmill track and have had no issues. This is a game changer to be able to use Zwift while running on the treadmill.
B**O
Works for manual treadmill
I just got it and used it once so it's too soon to say if I'll have the issues some others did. I'll update this if I change my mind but so far so good. It connected as a foot pod to my Garmin vivoactive, but the Garmin started behaving badly with it connected (weird heart rate readings and inconsistent reporting of speed). Based on experience I suspect that's the Garmin and I have more troubleshooting to do there, but just reporting for anyone wanting that. It works great with the peloton app and other Bluetooth apps. so far using the stickers worked fine attached to the bumpy rubber treads of my curved manual treadmill. It did not seem to mind the speed not being steady like with a motor, and I'm just ignoring the incline stuff. Tracked pretty well with the reported treadmill speed and my own sense of exertion.
D**L
Not a good experience....
I don't write Amazon reviews. But this device is so lame I felt compelled to save others from frustration. This device did not work for me at all. I have a Commercial 1750 treadmill and followed the directions to the letter. It would not capture anything from my treadmill no matter how/where I mounted the device. Luckily, you can calibrate it for issues like this. Unfortunately, their software will not run on an Android device unless it's ancient. I have a Samsung S24 Ultra, which came out 2 years ago as of this writing, and that device is too new for their software to run. I reached out to support about it, but I didn't hear anything back from them. The build quality isn't great. It feels like a child's toy, made of the cheapest/flimsiest plastic. In my case it was a complete waste of money. I wouldn't recommend buying this device, especially if you're an android user. No idea if it's a better experience with iOS.
B**K
Setup isn't easy, flimsy device, IF it connects, it will give you output.
UPDATED REVIEW. - ADDED ONE STAR. I finally got it working. I don't know if perhaps NPE updated their app, but I got app to connect. Sadly my RUNN device still won't fully charge and after it being attached to my treadmill for a 10 minute walk, it drained from 50% to 20%. I don't anticipate it lasting beyond a 30 minute walk. Be prepared to recalibrate. Once I did it was impressively accurate, albeit, delayed in catching up to my few speed and incline changes. It played very well with the Peloton App, and I was able to finally see metrics during my walking class, I previously had no access to. These metrics which will live in my Peloton account (distance, KJ, output, speed, incline, elevation). The device also didn't hinder my AppleWatch from connecting to the Peloton class so I was still able to track my Heart Rate Zones without issue. That was also impressive. (My setup: NordicTrack Elite 1000 treadmill. I use an Ipad to run the Peloton app, and my Iphone for the RUNN app, I cast the Ipad to my television where the Peloton class was playing for full screen view and to hear the Peloton class loudly - the setup worked extremely well). Its a wonderful idea and could be a perfect device, as there is nothing else on the market like it, they just need to work out some serious issues. Like the charging, and basic issues, like the horrible stickers that don't stay put, they also should improve the quality of the device itself, rather than flimsy plastic. Would I purchase this again, or recommend it, YES, if the device cost far less, like $25. The price point is currently way too high for what you get. So I would not recommend purchasing it. Invest instead in a treadmill with Bluetooth FTMS support that can link to your Peloton classes. ORIGINAL REVIEW: PLEASE DO NOT PURCHASE THIS. Would give 0 stars if I could. I purchased this as a way to get more statistical information out of my Peloton walks on my NordicTrak Elite 1000 treadmill. This device does not work at all. Complete waste of money. Issues: - Will not charge fully, there are 3 dots on the device that glow when its turned on, only one of them ever glow on mine. - Will not connect to their app via Bluetooth to complete setup, literally set the device on top of my phone and left it there for 30 minutes, it simply will not connect via Bluetooth. I uninstalled and reinstalled the, I made sure my Iphone was updated. It doesn't connect. Useless. Mounting the device is impossible: - Tried several methods to get the stickers to stay on (cleaned treadmill, sticking them on duct tape, sticked them directly to the treadmill, nothing works). Even when they did stick for a second, when I turned on the treadmill on its lowest setting, they all flew off. I would have to paint white lines on my treadmill. - The device doesn't fit properly on my treadmill (NordicTrak Elite 1000), I had to get creative to get it to stay properly on the side of my treadmill (I saw a video where some one used a piece of wood so it was high enough to track the treadmill, but that won't work for my treadmill, I finally figured it out, combination of piece of plastic and lots of duct tape to get it mounted on my treadmill). - The device itself is made of extremely cheap plastic, I had to put it on the highest setting in its cradle so it would be high enough to track the markers that won't stick to my treadmill belt, and the device kept falling down to the lowest physical setting onto the treadmill or it would sit tilted in its cradle, so the only other option was to gently duct tape it into the cradle so it stays seated. For the price of this product, I shouldn't have to do this. -Durability, nope, I expected it to feel a bit more durable, if you drop this thing once, or if it falls out of the cradle seat onto the floor, It will break, its extremely flimsy cheap plastic. SUPPORT: And the worse part, I cannot find any type of support or help for the product. Please do not purchase this.
D**R
Indoor Game Changer
I've had my treadmill for almost 2 years now and I had intended to get one of these back when I first got it. It never really mattered that much until I got a coach last year and then the inconsistency between the treadmill and outside was really making some of my training difficult to track properly. I considered getting a Stryd but the cost was really putting me off. Then my wife got serious about training for a half marathon we're running next year and I remembered this thing. All I can say is "Wow!". What a game changer! My treadmill runs slightly faster than what's on the display (5 - 10s per mile) and does that pretty consistently through every pace so its not hard to deal with for workouts. It was so easy to set up too. My only issue was the stickers just didn't really want to stick to the tread but that was easily solved with some dabs of superglue. Its amazing because it "just works". It shows up as a footpod on my Garmin 955 Solar and I can just go! All of my other metrics come from my HRM Pro. I'll be pairing it to my wife's 945 as well so she can benefit from it. Now I don't need to spend extra time trying to get my workout out of iFit and into TrainingPeaks so my coach can see it and its more accurate to boot!
W**O
Works with Peloton Treadmill App!!! - Update 3
Very easy to set up and configure on a 10 year old Nordictrak 1750. The stickers didn't stay on the treadmill, but used with car touch up paint as the markers. It works well with the Peloton treadmill app - tracks the pace, but doesn't doest track incline it seems. It's not 100% accurate, but it's close enough and much better than my Apple Watch or Garmin. Update 3 - there were two sets of stickers in my kit. The first one (originals) were didn't stick too well. The second - Girard - tough to peel off from the backing, but sticks much better to the belt. Time will tell how lasting the adhesion will be. Kudos to the marketing team.
T**I
Works very well. I use it paired to my Garmin watch and it’s accurate and reliable. One star knocked off because the battery can suddenly drain very fast. I leave it continually in charge now.
P**J
Easy to set up and worked immediately. Takes a few minutes to calibrate the speed of the treadmill with the Zwift run application. I found it gets around 90% accuracy. The problem with it is that it occasionally turns itself off in the middle of a run. You know it has happen because your Zwift Atavar will stand still while you are still running. Its a bit annoying having to slow the treadmill, jump off, turn the sensor on again, jump back on and get back up to speed. When its bad it may happen every 2Ks. Given I am old and only run 5Ks I try to think of it as a stop to have a drink.😅
M**.
Great product and very quick and easy to set up. Trouble free running on the treadmill with Zwift. A lot more accurate than a foot pod and trouble free fast connection. Long battery life with easy recharge.
T**D
I purchased this Runn treadmill sensor to use with my non smart Mobvoi treadmill. I subscribe to the Peloton+ app and wanted a way to accurately record my runs and workouts. Peloton now support FTMS Bluetooth sensors - this is one of those such sensors. The sensor is relatively small and fairly easy to attach and configure to a standard treadmill. Everything you need is in the box, including a sheet of reflective stickers which you must attach to the treadmill belt at intervals of around 18". In all, set up took me around 15 mins to complete. You then need to download an app to configure the device as out of the box it was widely incorrect especially when reporting the incline. My treadmill does not support incline so i set this to 0 in the setup app. There does not appear to be a way to disable this function, i am hoping that in a future update of the app you will be able to switch this off. Connecting the device to the Peloton app was simple and straight forward, you do this within the actual Peloton app. On my Android phone the Runn reported the correct statistics such as speed and pace directly into the screen overlay of the running workout. I was impressed! My partner however uses an iPhone and this is where our problems started. The stats from the Runn device only display on the IOS app if the device is in portrait mode, landscape mode results in all of the stats disappearing. After much research it appears that this is a fault with the actual Peloton app rather than the run device. Apparently Peloton released an app update for IOS in Feb to correct this, but it is still not working! This is super frustrating as using the device in portrait mode results in a tiny video playing. Hopefully Peloton will eventually release a fix for this issue. Now for the device itself, one problem i did experience with this device is that due to the fact the sensor has to stick out slightly over the running belt, both my partner and I found ourself kicking off the sensor on occasions - i suspect this is due to our treadmill being a narrow home treadmill. The 3M tape that holds the sensor bracket to the treadmill is not strong enough to keep it attached permanently. If you have a wider treadmill then this may not be a problem for you. Luckily despite us kicking off the sensor several times whilst running it does seem robust and has not yet broke! The reflective marking stickers have remained on the belt without issues, i note other reviewers have stated the come off, however i have not experienced this issue myself. In summary this is a great little device that makes a dum treadmill smart. If you have an android device and use the Peloton app then i would recommend this - however if you are using an iPhone/iPad then you may want to hang on until Peloton update their app to enable the FTMS function to work correctly.
Trustpilot
3 days ago
2 weeks ago