Might a bluetooth speed sensor on the rear wheel be able to connect to my Garmin Edge 810 and avoid the problems generated by the magnets on my dynamo? When GCM communicates with the sensor it will upload the FIT file from the sensor and send it to Garmin Connect. Please note this table is only a guideline and by no means complete or 100% accurate as wheel circumference can vary due to tire pressure, tread selection, tire thickness, rider weight, rim width, and load. For example, a 28-622 (700 x 28C) tire has a nominal width of 28 mm on a rim with a bead seat diameter of 622 mm To get an approximate diameter (in mm), add the bead seat diameter to twice the tire width (since the tire depth comes into the diameter twice: 622 + (28 X 2) = 678. In the context of this thread, Garmin Edges (so enabled with speed sensor/Ant+) allows one to set the speed to the speed sensor calculation rather than the GPS one. Once set up, you'll get accurate speed and distance at all times — even without a head unit. The speed sensor 2 attaches to the hub of either wheel. In this mode the wheel size is stored on the sensor so that it can compute distance, If the sensor is paired and in communication with a head unit then it does not record the activity locally. Fine tune another time. Once set up, you’ll get accurate speed and distance at all times — even without a head unit. This Access Bike Speed Sensor from Garmin helps accurately track your speed, so you can take your training to the next level. Hi thanks for the description. If you never want that possibility use a speed sensor and set the wheel size manually. Multiply this by pi (3.142) to get the circumference in mm (F) 2130. If they also receive data, you'd have to wake them up to get them to receive it. 0. I currently have 5 speed/cadence sensors paired to my garmin edge with no issues, if you don't set the wheel size and are using it on a turbo, set it to manual and it uses a standard size. Rated 2 out of 5 by Figary from Not so good I bought this as a replacement for Garmin's combined speed/cadence sensor. I then had a longer stop after 200km for a coffee where I did the same. It makes more sense to keep software off of the sensors because there isn't any provision to fix bugs on the sensors (so, they have to be as simple as possible). On my road bike with the sensor, I tried setting the wheel size way small (20" wheel and not 29x53) to experiment. The speed sensor 2 attaches to the hub of either wheel. Once set up, you’ll get accurate speed and distance at all times — even without a head unit. The wheel circumference on the initial setup screen displayed as I'd changed it. Customize or set the wheel circumference for a speed or speed+cadence sensor in the Wahoo Fitness app for iOS or Android or for the iOS or Android ELEMNT App for optimal speed and distance accuracy with these steps:. Showing 1-3 of 3 messages. If your Spin bike has a hub like that of a typical bike wheel, it will be a matter of seconds to put on the speed sensor and take it off. With your sensor saved and actively paired to the app, navigate to the Saved SPEED Sensor page to tap Wheel Circumference. 2. No problem. If you are recording an activity on the edge as dpawlyk said the wheel size is for each sensor is stored on the edge. With your sensor saved and actively paired to the app, navigate to the Saved SPEED Sensor page to tap Wheel Circumference. Garmin Access Bike Speed Sensor 2. GUID-B6897258-6059-4C69-BA0E-14FE48EBC29A v4. 98 There really needs to be some distance/time threshold, which can be set where activities, which don't meet the criteria are discarded. The wheel size might be stored in GCM and not on the sensor. Once set up, you’ll get accurate speed and distance at all times — even without a head unit. Does anyone know if these wheel size numbers stored on the respective wheel sensor or the edge 830 device? The sensor is easy to set up and you can set up wheel size using the Garmin Connect app for improved accuracy. The sensor is easy to set up and you can set up wheel size using the Garmin Connect app for improved accuracy. My new Garmin magnet-less speed sensor is spiking random data after I installed a front wheel with an SP-PD 8X dynamo hub. This disable the local recording of distance on the sensor. Only with the GPS off did it read way short. In the "Wheel Size" field, select an option: Selecting "Auto" will use GPS data to calculate your wheel size. Amazon's Choice for garmin wheel sensor. Let's take a look at the Garmin Speed Sensor and how it works on a trainer an exercise bike. I knew that at approx 65rpm I covered 2km in 5 minutes. Simply attach the sensor and ride. My new Garmin magnet-less speed sensor is spiking random data after I installed a front wheel with an SP-PD 8X dynamo hub. I have two speed sensors. You can set up wheel size in our Garmin connect online community or self-calibrate with an edge cycling computer or compatible Garmin device. The sensor self-calibrates with an Edge cycling computer or compatible with Garmin devices. The Cannondale wheel sensor, in conjunction with the Cannondale App, automatically records when you ride. Garmin Support Center is where you will find answers to frequently asked questions and resources to help with all of your Garmin products. 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