Had one for nearly 2 months now. It replaced the older version of an FSA powerbox that had a P2M NGeco paired to a boat anchor of an FSA crank. So far very good, put some Absolute Black rings on it. Numbers are spot on. The biggest surprise to me is the quality of the crank, a lot better than i was expecting. The previous video was what convinced me to get one. Thanks for the tip 👍.
I have had mine since July. Ordered direct from china. With chain rings, $370 USD. My last 2 crank sets have been 11 speed Dura ace and Ultegra. I put the Ultegra on when the Dura-ace left crank arm broke in half when I got out of the saddle for a very short hill. Almost crashed! Now, I am no power monster, I was 68 years old when it broke. A crank arm should never break under that kind of load. Anyway, the Ultegra rings were pretty worn out so for about $200 more than just rings, I got new rings and a power meter. And the included rings shift just fine! But I have had very little power meter experience, so did not know how good the PES power meter was. Very happy to see that you like it. Really enjoy your reviews, keep up the great work!
You made my day, I just took a punt and chose these over a used 4iii left only for my Allroad/Winter bike and I've had that "what have I done" feeling for about 3 days 😂.
I bought one of these and have have had a few rides on them. So far, for the money, it's one of the best budget power meters out there for Shimano users. Straight swap from my 105 crankset, no extra spacers, no muss, no fuss. Installation took less than 5 minutes. It's not the lightest set of cranks, but for $300 USD you really cant beat it. Data has been spot on with my Assiomas...except for one thing. I don't remember if you mentioned it, but it does not like oval rings. I'm a weirdo and run a round outer big ring and oval small inner ring for climbing. The round ring data was within a watt of my Assioma pedals. But I had two 10 minute climbs in the small oval ring and the Magene read around 4-5% higher. I did another test indoors on the trainer and again, perfect match when on the round ring, 5% increase when on the oval ring. Not sure if Magene will address this but I may just go back to a round ring for these cranks. Really not a huge deal for a great budget option.
I have used several Magene powermeters: Smart Trainer T300, Powermeter P325CS, and Powermeter P505. On both the Smart Trainer and the P325CS, I experienced the same problems as those found in the videos for those products on this RU-vid channel. But the P505 works perfectly, I have tested it with the smart trainer Thinkrider Neo X5, Powertap hubs and pedals, and the measurements are very precise.
Glad to see the downward price trend on power meters. Not that I was tempted being a pedal power meter evangilist but glad you mentioned the GRX incompatibility on the spindle. So I'm still in the market to pick up a second set of Favero Duos, which I currently switch between my road, gravel and mountain bikes in the time it takes me to fill up two water bottles..
@@zzhunt3254 I have that 4iiii Podium and its terrible. Every 10-15 minutes cadence drop to zero for around 10 seconds. I plan send it back and I hope that they solve this issue in warranty. Also crank arm powermeters are much cheaper as spider powermeters.
@@zzhunt3254 since the magene pes 505 is a spider based power meter, it measures the power from both legs. The 4iiii 105 is cheaper but it measures left power only. The dual sided version of 4iiii is way more expensive.
Thanks as always. Good news in PM trends - seeing prices below USD 1000.00. I'm running Assioma Duo on my road bikes and 4iiii left crank on GRX on my gravel bike. I see the GRX version of Magene for those doing gravel events where power data might be more important.
Brought one of these primarily for my Gravel Bike (1 x GRX) but have also been trying it out on my 12 Speed Ultegra road bike. Delivery from Magene was a bit delayed as I ordered it over the Chinese Autumn holiday (about 10 days later than initially expected). Had an initial issue where a firmware update caused the unit to stop working. Got a good response from Magene who gave instructions on how to reset the Power meter. First couple of rides on the road bike have been good with consistent power figures. A quick check of the power verses my Wahoo Kickr shows pretty similar figures so accuracy seems good. To install the power meter on my gravel bike I did have to file a little bit off the GRX 1x chainring as it did not quite fit around the spider. However after that it all fits well. Not had a chance to ride it off road yet but will do that over the weekend. Installation on my road bike again was fairly easy, the 12 speed rings fitted straight on with no issues. The chainrings position is about 3-4mm more out board so did need to adjust the front mech. Going to move it between the two bikes over the next month and if there are no issues will buy a second one so that I have one for each bike.
@@pelekX Hi, you attached the charging cable and then take a magnet and place it on the chainset body just to the left of the led light. Contact Magene Support if you are unsure and they will send you a picture of how to do it.
@@spangelsaregreatful ya i have done the reset base on the support instruction. But still having the issue where im having failure to zero calibrate the pm 😢.
This data looks awesome and unreal. I just ordered one because of this video, hopefully I will be satisfied with the product 😭 Will write an update on this comment when it arrives and when I test it.
@@gplama arrived a few weeks ago, kinda fast delivery. So far so good, power numbers are exact compared to my elite suito trainer. Easy to install, no dropouts or anything weird. Cranks also seem like they are good quality. So far I would recommend it :)
I have the Magene QED P325, crankset power meter, and I am really happy with it. The whole crankset comes to 700g for the 52-36, 167.5mm version. Sometimes it is on sale for 400 USD and even less with coupons
Hey health data scientist here. You can plot those comparison graphs on a bland-altman plot and run a lin's concordance correlation coefficient test to see how well the data agree with each other, and mention the bias. these methods are frequently used to compare how does a measurement tool compare to a gold standard. also, just curious, how did the crank arms themselves perform? were there any noticeable flex? what about finishing quality?
Wow. This looks awesome! I bought a p2m and rotor crank/24mm axle last year. Reason was exactly as you say, 24mm and Shimano chainring compatibility. Now, I would definitely buy this instead
same here, the roadbike is mainly used as a zwift bike. And for the gravel bike im looking for some new "road" wheels and a powermeter would complete the package for me.
Bit of warning; the crank is not compatible with T47 IB bottom brackets. I bought this as a replacement for my ultegra crank but T47 bearings sit too flush at frame with certain bikes (Trek domane/madone) making the power meter scratch on the frame (had some paint damage after installing).
I bought the p-505 3 months ago and it stopped communicating to my Garmin. I email the company and they told me I have to ship it back to China ($40) than if they think it needs replacing they will send me one or fix it. Also charging me another $40. So a total of $80 to get a replacement.
I wish everyone would make their spider based power meters (and just regular spiders) like the regular P505 where they give you a bunch of mounting options for one BCD
Nice video and presentation. One good way to hide flaw with axial based sensors from paddle based is combined power/time plot and not separated left and right plot. Axial based sensors produce mono torque data requires cadence timing to distinguish left from right that involves post processing. Flaws contributed by cadence timing and algorithm will be lost in combined plot.
I have these Left arm came lose many times, medium loctite did the trick here. Mine replaced my grx 2x with di2. There was enough adjustment in the fd to make it work perfectly, although I run 50 36 rings. Grx 48 31 can't be mounted
Hello Shane. I make a review of this powermeter, but only in Russian, will make it in English soon. It is very important to use thread locker, because the bolts (both on the left crank arm) has a tendency to unscrew. So be careful, the thread locker from factory is very poor
Warranty of magene is for repairs only. They will not replaced a new one if there is defect. You also need send powermeter to china at your own cost. 50usd-100usd. Im from Philippines they have authorized distributor here. 🤔 They insist to send the powermeter to them. I bought my powermeter in lazada magene LazMall
I can confirm this about the warranty. If something goes wrong you will have to send/ ship the meter back to China. Is sad some of these RU-vid influencers get their (sometime free?) products to review and if things goes wrong they (the manufacture) will reply immediately to address the issues/ problems but to us the average joe? Good luck or even getting ahold of them...
@@thomasklarmann6502when I installed I observe that front derailleur needed adjustment cause chain doesn’t jump to big cog from the small. Nothing serious just I mention it
How is axial bearing play taken out - is it some kind of springy washer? Personally I prefer the pinch bolt design as per Shimano and headsets, I had a mountain bike with SRAM with the one magic bolt that both fastens the crank on and takes out play and was not impressed with the design.
Rotor should make some 24mm spindles and cranks for gravel and MTB with a higher Q factor. Like Vegast/Aldhu modular, so one could stick a P505 on it and there would be no need for a Magene crank.
@@TheWoogeroo yes. Get the 505 spider for Rotor ALDHU and get the Rotor 24mm Gravel Spindle which is wider than the Road spindle. I'm using this on a 2007 steel trekking bike 1-by since December 2023.
Looks like the crank/spider is not replaceable? I just broke my Infocrank powermeter due to a snapped crank arm outside of the warranry. I'm now looking for a spider based PM but with the option to replace spindle and cranks (not sure if ROTOR ALDHU Road 24mm is wide enough for my steel frame)
the P325CS, it wont wake and won't charge. Didn't get support from magene so my temper got the best of me and I throw it away. Now my P325 just blinks red when I tried to charge. Both are from aliexpress around early 2021. Now I have the PES505 and I hope it won't have the same fate as the first two.
I appreciate the argument about less (buying) complexity, because you're getting a spider-based PM with the cranks. The downside is that you're locking yourself in with said manufacturer on more components than you would maybe like. If you damage the cranks, does that mean you need to buy the whole lot? Is there an option of buying just the spider? And if yes, what other cranks axles/spindles would this be compatible with, if any?
@@gplama does look remarkably close now that you mention it !! Even to the double spaced notch there. I am waiting on a unit, will check if it fits on the m7100 I have here :)
Impressive. Very. Looks like a shoe-in option for the farcical Shimano DS powermeter. Can 11spd chainset rings be used with 12sp chains with no issues? Moving to a 12spd gearing and using the rings from the original 11sp chainset seems a cost-effective way to upgrade.
Just in the last month received mine from Aliexpress, under €300 with chainrings, had to buy a new BB, Ultegra €25, as I am a Campag man from birth!!!! Seems great tells me what I want to know and at a great price!!!
Any idea on whether it would work with Campaq Super Record 11-speed Compact chainring 50/34? This group set is old by today's standard, and I wanna reuse the chainrings if possible.
Not that it matters much, but one interesting detail is that the specs for the P505 base, have 1.5% accuracy and 200rpm max range, while for the standalone P505's they seem to mention 1% and 240rpm. Is there something different with the accelerometer on the other units ? Or was the accuracy improvement from a firmware upgrade and they just didn't change the marketing material for the P505 base ? (I remember the same 1.5% when the spider only P505s first came up, now they seem to mention 1%). I ordered a full set of these to replace dying ultegra 6800 chainset. It was cheaper to get the full thing, than a spider only + rotor or whatever set.
So the take away from this comparison is that either premium brands are over charging for budget level accuracy OR budget friendly components are offering premium level accuracy. Anytime you need to zoom into a graph to nitpick accuracy and the price difference is a gulf apart, makes you wonder what are you actually getting for the inflated price regarding the core feature of why we buy power meters. If they both offer readings within 1% of each other, one seems more like daylight robbery.
There's more to it than just the product. Support/warranty/servicing etc play a big part in the pricing. These lesser known (or newer) power meters are now challenging the established players for data/accuracy. It's up to the companies behind them to back them up with a good distribution network, support, etc.
I just got them and im deciding what chainring I'm going to use for gravel (planing on use 46/32 or 48/32) :D, I have food experience with the p325cs but is more for road (nothing against it)
Hi GPLama, thanks a lot for tou detailed review. I'm looking for a power meter on my road bike equipped with an ultegra r8100. Which one do you recommend? Magene p505 base or 4iiii precision 3+?
@@malennachbruchzahlen The Japanese distributor has a paper template that you can print out to see if the crank fits your bike: growtac.com/wp/wp-content/uploads/PES-P505_BBShell_check.pdf
Is this crank 100 grams heavier than the Shimano R9200 equivalent? Id also love to know what installing the Magene rings does for the weight and the shifting.
hi, will this fit a 73mm shell, MTB threaded Shimano BB51 for example? not sure if road assembled face to face width is less than MTB 24mm shimano face to face width.. Is this related to GRX compatability?
@gplama i just bought this power meter and put 12 speed 52 36 front rings on in use with 105 di2 front mech. I cant seem to get enough adjustment out of the FD. To get the cage across far enough to clear the chain it ends up rubbing on the back of the crank on the drive side 😢 Any ideas Shane?
Shane, have you checked the L/R balance output and compared to the others? I'm feeling like mine Magene unit is "more leftsided", as I'm getting results of around L56 R44, and I'm wondering whether that's real or not.
All spider meters can only estimate L/R balance. They won't ever be as accurate as a true dual sided (2x sensors) meter such as crank bases dual or pedals.
At the end of your video you were talking about compatibility issues with your new 1x GRX group set. Is the magene power meter compatible with the GRX 2x11 group sets?
I haven't even tried installing this with a GRX group. It's specifically designed as a road crank, so you'd want to check the q-factor and frame clearance before attempting to use this as a GRX crank.
Hmm. That’s seems peculiar. What is the reason that you feel/know it won’t fit the 2x hex drivetrain? I got in touch with the Magene engineers and they ensured me that it would fit my bike. Have one in order now so will try it out once it has arrived and leave another comment here within 2weeks
@@TheLeviatanMan The GRX small chainring bolts on to a different part of the GRX crank as it is smaller than a normal road small ring. The smallest inner ring you could run would be 34t which might be a bit big for a 2x Gravel set up.
All spider power meters, such as this, or the SRM or FSA etc provide the combined output of both sides, therefore, it's a dual power meter. However, because the strain gauges are located in the spider and not the cranks you can't really separate where the power is coming from (left or right) precisely. Does that make sense?
@@cyclecoachcyclecoachcom8071 Spider-based PMs often estimate left and right power by assigning one half of the crank cycle to each leg. It is more accurate than you might think since recent testing has proven that even if you "pull up" with the opposite leg, that leg's contribution to powering the bike during "upstroke is cancelled out by the leg that is pushing down. SRM uses this method of calculation, and is still the gold standard for power meter accuracy.
Hello everyone! Im using a stock cannondale caad8 which comes with FSA cranks (and BB, i assume?). Question is, will this fit in perfectly w/o changing any components? Thanks!
But surely a fair bit higher after shipping and duties? At that point a 4iiii or stages 105 left crank would be comparable price with similar performance but in-country warranty etc?
@@zachs6191 A spider measures both sides as one whole number then the app attempts to split it to give L/R which is not really possible. The known brands all do the same. A left only measures one side and doubles it which leads to inaccuracy and spikes.
@gplama do you know of any powermeter that comes with a 24mm shimano axle and a length of 160 mm? For time trials, where you often ride wahoo aero pedals and short cranks, that would be very (!) interesting. The first thing that comes to my mind are Rotor Aldhu 24 crank arms; but they are too long.
@@gplama ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-I12o0Ijp0qE.htmlsi=X6O6689KtOOS-MAy There's a video here showing the tiniest clearance between the crack arm and front mech cage. Is it a case of wrong set up by this user?
I have put it on two bikes, one a 1x GRX and the other 12 speed Ultegra. Didn't notice much difference with the GRX. On the Ultegra the rings definitively sit about 3mm further outboard so I did have to adjust the front mech out slightly. No issues with clearance, it is on 52 - 36 set up.
I have seen some crank arm tilted or very tiny tiny bit bending issue due to manufacturing on other Magene power meter. I do not know if this issue is fixed?
Is the spider compatible to other cranks? Maybe Rotor Aldhu 24? I just had a snapped crank on my Infocrank powermeter and don't trust some custom cranks anymore. I want to be able to replace a crank, not throwing away the powermeter. Thanks.
I'd stick to XC/MTB specific cranks for that use case. Not sure on the oval ring support. Typically if a company doesn't list oval ring support, they don't support them.
It's a tough one to answer as I haven't dealt with direct customer support for either. I'll have to defer to others who may have had experience with either company in this capacity.
This is great for consumers,but established pm manufacturers are dropping prices and have EU support,I took a punt on Kickstarter magene pm and fine but accuracy,like a stopped clock, correct twice a day.jurys out for sure,once bitten etc.you like myself ,weren't impressed with their first pm iteration.
I have magene powermeter P325CS left crank near the bolt has crack already been using it amost 1 year. Warranty is still covered but magene aftersales asked me to send them and figure out if they can repair. If not they will just replace a new leftcrankarm.
I´ve been using it since february and noticed a quite considerable difference between my KICKR (-7%) and my previous PM (Power2max NGEco) -3% Anyone with similar experience?
