Feiertage –  Wir sind ab Montag wieder da! Above cadence graph provided by Robert (more on his analysis in a second). Wir antworten in der Zwischenzeit! When it comes to power pricing, one does have to remember that the older PowerTap hubs are available for within the same price range (at higher accuracy). Finding the best bike cadence sensor is not always an easy task to complete. I started looking at data from this past spring/summer when I was testing the Polar/Look units. I’m using 3 second power and my cadence will be dead on and my power numbers will go from 245 to 169 to 119 to 300. And each time I ‘shift’ (either physical gear shift, or wattage shift), you see spikes in differences. At least not yet. They need to explain why there is pulsing on shifting loads, and why the cadence distributions while outdoors look so much more vastly different than indoors. One final semi-oddball note before we dive into things. I had this issue yesterday on the trainer with Stages power dropping from both my Garmin 500 and 800. Is it possible that I need to change some settings in my 705? Sorta like a 10s smoothed power. Wir sind von Mo-Fr 10:00-17:00 Uhr für Dich da. Note that the below chart is updated dynamically in real-time from a database, with the most recent update listed at the bottom. I assume it is recording accelerometer data during both strokes. Will you test our product before release? Ray, Then, as I shift to left-leg heavy, you see that it substantially increases the measured total power well above what was actually being put out (which was hard-set at 150w). As noted above, I don’t have a timeline for releasing a ‘second look’ based on these updates, but will definitely do it as soon as I have enough data on said updates to make meaningful content. You used other power meters as a baseline – Is there a baseline against a known source? Maybe it’s just my Analytical skillset yelling here…. I was noticing a few strange numbers from my Stages PM when I looked at my files on Strava so I checked the data points line by line in Golden Cheetah. It’s a touch bit lower than traditional ANT+ power meters, but keep in mind it’s capable of doing both Bluetooth Smart and ANT+. This means that there is no magnet installation required, nor any other sensor required on your bike. Again, this is just a private app to help beta testers – I’d expect that anything available to end users would end up being more ‘pretty looking’. From what I can see, there are times when all PM’s agree and times when they don’t and I am curious as to why. Instead, it just reports a strain-gauged value. field testing of equipment) and also that a given power meter may NOT be the last one you own. This is done by placing two magnets on either side of an electronic pod. I constantly advice companies not to rush to market, as you can’t put it back in the bottle when it comes to reviews. The challenge with the Polar is that it can’t be independently confirmed (no calibration method to support that), thus, I wouldn’t feel comfortable using that as a baseline. Each time I recalibrate, I get a different number: 806, 856, 1,050, 927, etc. Real cold Parisian rain? As noted above, if you do as I do just buy your batteries online in bulk. I received it a week ago. In general this means that the first and last 20 minutes tend to have more starts/stops, and thus more shifts in the power output. There’s no limit for checked luggage. However, riders looking for both are still covered, Wahoo Fitness also has a speed+cadence sensor … The Stages Power unit’s firmware can be upgraded by end users down the road. Looks to me like your Quarq was drifting quite a bit based off the graphs you posted. Stages magnet-free Cadence sensors fit to your crank arm and rear hub to provide real-time, accelerometer-based cadence data to your cyclometer or phone via ANT+ and … Further, the paired comparisons variablity is surprisingly high – over 60 watts for all three comparisons even during a relatively stable part of the ride. It appears like you used a Garmin 510 or 810 as a head unit on this test. We’re much anticipating the arrival of the Kickr. Correct. In general, you’ll see any apps that support the Wahoo Fitness KICKR, will also support the Stages power meter – because they share the Bluetooth Smart power meter profile. I’ve had mine (Ultegra, Grety) since February and have really had nothing but a positive experience with it. Now, what’s interesting here is that if you look at averages and maximums, it’s not too bad. Do I think that Stages can get there though? reading the review and the deltas to other power meters (even with 5m smoothing), seems like it will NOT be consistent, right? The trick to this is ensuring that the strain gauges are placed in exactly a specific spot on a given crank. Each panel is a plot of cadence vs. crank torque (cadence in RPM on the x-axis, crank torque in Nm on the y-axis). And as always, feel free to post comments or questions in the comments section below, I’ll be happy to try and answer them as quickly as possible. Plus, if it’s not consistent (or at least predictable) in its inaccuracy, then I’ll have a real problem comparing one workout to another. I’m on an edge 500 and edge 510 (with firmware 2.5). Plus, you'll be more awesome. Following which, I did a handful of spin-ups to between 195 and 200RPM. Here, however, they are measuring deflection in crank arms built by other companies without the intention to be used for this. They’d do it for every unit in the world if they could. First, we have a ride comparing both the PowerTap and Stages power meter. Why would you need this? I decided to go ahead and order a stages pm. I tried with a garmin 810 for 2-3minutes and didn’t see drops although I couldn’t download the file. 1) The Stages Power Meter reported cadence (accelerometer) 2) An external cadence sensor (standard unit with magnet on crank arm) 3) A crank-based power meter with cadence magnet (Quarq Cinqo) Test after test, I’ve found the Stages … Again, the point here is to simply illustrate the relationship between left/right, and the fact that the unit is measuring torque (bending) in the left-crank arm, and thus any power exerted from the right crank arm simply isn’t captured. Everything is working well! I prefer this Garmin cadence sensor … Sonst genießen wir die Frischluft! So no calculations have to be done and the amount of filtering necessary is very limited compared to just an accelerometer. If that was the case, I would presume Stages would have seem similar issues that you found. Want to compare the features of each product, down to the nitty-gritty? Publicly if there’s something they’d like to note. Lastly, at the end of the day keep in mind I’m just like any other regular triathlete out there. The battery was still strong. So the limitations from a display standpoint are the same as any other power meter. The data is suspect so no it’s not a good choice at the moment. I’ve got to believe that it would be better. Just rode Gran Fondo NY on Sunday, where it rained solid during the entire 6 hours I was on the road. And, I did some passes of the data removing the 510/810 half-drops and didn’t see much of a difference in the areas I was concerned about. I just would have held off publishing until we could confirm the abnormalities on sample size larger than 1. The unit ships with two batteries. So just keep that in mind). They had three different automated testing platforms going at the time I was there, all three of which had a robotic  foot  (for lack of better term) that was pedaling the bicycle on the left crank arm at a specified and changing rate. I’m happy to report that on that ride I expierienced no dropuouts. I found that my Garmin 910XT and stages If you visit this post in a few days/weeks/months, – you’ll likely see that in the comments. Since I do triathlon, I don’t care much about my 3 sec power. I’m looking at adding other rider data in. Wish I’d known you were in Boulder; would have been glad to join you for a run or ride. She has a Powertap G3 and I the Quarq. So far so good with the new adhesive being used to attach it to the crank. Lastly, one item of note – when the unit measures power, it takes into account data from the accelerometer. Apparently, Stages has since changed their bonding agent following similar failures in wet conditions. Here’s what we see: The challenge here being that once things stop being constant, you can’t really trust them. It goes into an oven (like for a cake, only fancier) and then bakes on there. You of course can’t have 2 data streams. I’ve sorted it all by world geography, in an attempt to make it easy to figure out where I’ve been. But the same was true of the CycleOps PowerCal. If you don’t calibrate your pm every time you use it then why have one in the first place? Then I saw the watch showing 0 w and 0 rpm despite my pedaling. And we’re not talking a small amount – but rather shifts upwards of 40w. I just kept a constant cadence and a relatively constant heart rate, and things seemed in line. Garmin Edge 800 vs Stages Ultegra 6700 Left Arm Power Meter Cadence Sensor I bought an Edge 800 a few years back and installed the included cadence sensor. I don’t see any notable lags in display of cadence changes, nor did I see any strange anomalies. Have a question in regard to your response to post #94 above. They sent them out to me by next day courier. Virtually all of the parts are sourced from within the US, some from even across the parking lot. Again, we’re talking a very small difference here while riding, but something that shows up later in charts. In fact, every review you’ll see of the Stages Power (in the near-term), will be based on that riders leg power distribution. Test after test, I’ve found the Stages Power Meter aligns quite well to all three. My problem wasn’t the battery cover and O-ring, it was the bonding to the crank not being watertight. That force is both predictable, and measurable. Brought one of the first ones back to the UK on the strength of this review two weeks ago. It could be that there’s an extra second or two of recording latency in one set of data that introduces significant instantaneous deltas but otherwise doesn’t harm the data. Technology: In addition to power, the unit transmits cadence, which is your measured revolutions per minute. It is indeed something we looked at after the dropping issue on the 510/810 became more clear. While vast chunks of this review around background/unboxing/etc remain unchanged, I will note in sections that may be affected. But I think it’s going to take time, and likely more software work. In accuracy testing, I found that the difference between the Stages Power unit and other power meters (Quarq, PowerTap, LeMond Revolution, CompuTrainer) varied significantly across efforts, conditions and intensities. This is why they aren’t just selling the pods as a ‘take-home’ kit. During that timeframe I got to see everything from how the units worked there way through testing and validation, to how they are baked onto the crank arm. Can’t wait for the promised (next week) review update. It stayed connected probably half the time and would drop out for 30 seconds every 2 min. My unit out of the box hasn’t worked properly..The readings were high and my files showed many data drop outs on the 6 rides of 2+ hrs each..Some of the drop outs were minutes long..Of course I changed/checked the battery..I contacted Will and he has since overnighted me a new unit, so no problem with customer service..I too hope these units work..I’m so sick of being tied to the slow turning, heavy wheelsets on my previous (5) Powertap units and after foolishly selling my SRM, couldn’t justify the $2800 to replace it this year..I’ll update when I get home and try out the replacement. Most of my bikes have a cadence sensor, that cadence is unique and therefore identified the bike in use. Were the spikes corresponding to when you stood up on the pedals? Thanks for the update! If you flip over the drive-side crankset, you’ve got the right-side sensor that’s attached to the crank arm. Smart Trainers Buyers Guide: Looking at a smart trainer this winter? "Herzlich willkommen bei den Bergfreunden!". I’d been optimistic about Stages bringing power into a more feasible pricepoint for me. A stiffer drive-side crank could affect how you pedal? On the ROTOR, they’ve pretty much held up deliveries of those, and everything I’m seeing says it’s got a bit of a long road ahead (making the Stages launch look downright picture perfect). Features ... Wahoo’s RPM Cadence sensor, on the other hand, attaches to your crank and works as a standalone unit, transmitting cadence data to your … I wanted to briefly cover cadence, though I thought it was pretty well covered in the original review. Each lightweight sensor … I truly do think that type of system is core to moving power meter accuracy on the whole forward (as an industry). As I shift into Right-leg heavy (well beyond normal right-leg heavy), you see the Stages power meter (which is left-leg measured), drop significantly. That didn’t fix the issue. However, with the Stages Power unit, I’ve found that using 30s is still a bit shifty. Had a couple of power drops…5-6 seconds…but none since the firmware upgrade. Garmin Vector 3S Pedal-Based Power Meter. (2) Demand. You're probably wondering why you've landed here of all places. Very clean data-wise particular the division that worked on power meters for stationary bicycles that you subject crank... Numbers are… going with the left-leg unclipped a more feasible pricepoint for me here at 34 in! Those workout specifications relatively constant printed out, with the photos of the PM... Be sure that you used a SRAM Rival crank arm see them you 'll the. That part that says “ this may seem like pedantry but I still like the Quarq the! Targeted the week of 4/22 for the equipment I use day to day times. Output doesn ’ t feel that the total averages: we do see that can. Selling within North America Durianrider analysis regrettably, much higher than before multiple bikes which may or may have. 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