Where’s the best place to buy these from the UK? Struggling to find a single UK based retailer, and very much don’t want to get stung with customs charges.
I've got the Sigeyi power meter. I'm using it with a "cheap" ZRace crank I put on my old Synapse. I've never noticed it reporting power much differently than the Shimano power meter on my Dura Ace crank on my new bike and my Kickr. It is probably different by some amount but close enough for me.
It would be interesting to see a comparison of the data on the L/R power balance between your pedal based measurements and the sigey. The pedal based L/R power readings are supposed to be more accurate than the spider based readings since the spider makes an assumption that for 1/2 a turn the one side and for the next 1/2 the other side is the power generating element, whereas the pedal based power meter is much more specific and direct.
I have 2 Sigeyi PMs, one on my 1by gravel bike, one on my 2by road bike. On the 1by its fine. On the 2by the bigger chainring ran a couple of watts higher when I tested it against my smart trainer over a 40 min steady state low power workout (eg 184 w vs 188 w), The smaller chainring matched the smart trainer perfectly (eg 184 w vs 184 w). I will do more tests with higher power.
I have a very similar setup, but I use the rotor 30mm cranks and a XCadey powermeter instead of SIGEY. (They look almost identical though). I have very good results with it !!! Compared them to POWRLINK pedals they are spot on, also compared them with a KICKR (that is a good match to stages and 4iiii powermeters) and also everything within tolerances. Just needed to adjust the offset a bit on the app in the beginning, have been strong since.
I am using a sigeyi power meter since nearly 3 years now without any problems (3 bolt SRAM interface) I am doing around 5000 miles a year and typical rides are 5-6 hours. Battery lasts probably for 3 to 4 of those rides although I charge it after every ride.
Thanks. Would the results be different with other chainrings? A Spécialités TA chainring might be a bit less stiff as the Shimano chainring, which might cancel out the difference at the spider.
personally, i've had some bad expieriences with the data during sprints. the accelerometer did not capture the cadence correctly, sometimes dropped completely, giving some really bad readings. i've contacted sigeyi uk, from where i bought the device, and got no response at all. changed it for the good old SRM DA 9000 with magnet based cadence sensor, ultimately,
I use Sigeyi AXO on MTB and experience power spikes and a slightly higher average output. I also experience higher variation in cadence and believe the power spikes is related to high torque and issues in the cadence measurement
I'm using oval rotor chainrings, yes those 'aero' ones that flex a ton when sprinting. What would be a better power meter with oval chainrings? I know that team Sky had problems back in the day when they started using oval chainrings, which started the hype about them.
Would be interesting to also see some analysis of the Xcadey spider power meter in comparison to this, its available at a very similar price to the Sigeyi. They seem to manufacture their own 24mm crankset too which could be another option over Shimano that doesn't split in half.
What about the power update cycle? I use a Xcadey spider based powermeter with the xcadey cranks with a Fenix 6 GPS watch for my road cycling. While I do really like the build and ease of use of the xcadey combo I wonder why my data is only updated every couple of seconds. To be more precise it is every 4 seconds and it takes time to get used to adjusting my power to the adjusted training load due to the disconnect of leg burn and power display
I used my first Sigeyi for just over a year before it started reading way to much power. Got in touch with Sigeyi and at first they didn't want to replace it under warranty (the warranty is only 12 months). After some e-mailing they agreed to replace it after I destroyed mine and sent them proof. The new powermeter seems to work just fine for now, I'd like to see how this one holds up !
Nice review and it's great to see power meters becoming more affordable. I feel that GXP is practically dead here. Not just down to it's poor design (thanks Hambini) but DUB has superseded it. And with Shimano pretty much being the go to standard. So I'll go for a pedal based power meter as I've got GXP tied round my neck.
Hambini might not like GXP, but I doubt he likes DUB either. Proprietary 29mm bearings make it almost impossible for anyone other than SRAM to make compatible bottom brackets. A DUB bottom bracket in a 41mm shell is a bit of squeeze and hardly likely to be optimal. The Truvativ/GXP system has been around for a very long time and has worked fairly well, certainly much better than BB30 (for example). Both DUB and the new SRAM 12 speed system turns me right off. (But do not for one minute think that Shimano are perfect either; hash tag ‘thanks shimano’). I have always liked SRAM group-sets, but i don’t like the direction they are going now. It’s such a shame, as if SRAM can’t play nicely to ensure the inter-compatibility of parts with third parties (like Hambini for example) maybe it’s time to switch.
@@likemarksee Nothing is really stopping you from using a standard 6806 bearing and shim, which is what all the chinese BB manufacturers do. But thats 42mm OD though, not 41mm shell.
What are the technical benefits of spider-based power meter over pedal-based? Meaning, pedals are way easier to swap between bikes, one can use any crankset one needs/prefers etc. Also, eventually everything breaks so it's easier to swap pedals than spider. So, is there some advantage over pedals? And sorry if my question sounds biased towards favoring pedals, it's just I'd like to know why spider.
Robustness and repeatability. No moving parts, no bearings, no threads, no wear. All those things can affect pedal based strain gauge calibration over time.
Thanks for the review. How much power reading error do you think using a 1x12 drivetrain would cause? That would add considerably more horizontal chain angle, but a 40T or 42T chainring would be right in between say, a 34-50 double.
I'm using the magene p352 and unfortunately I can't compare it to another Meter on the road. My gripe with the magene is the chainrings use the 8 bolt pattern with limits the option for alternative rings. After watching this is most likely buy the Sigeyi.
You can buy a GXP Quarq (in the UK) i bought one last week. You just need to buy the DUB Axis spider and the crank arms separate. Surprisingly quite good value too.
@@PeakTorque yes, i bought compatible sram force GXP crank arms from cycle power meters for 199 and a 130BCD DUB spider (elsewhere) for 284. I thought that was good value. I have not assembled it yet as i need to a torque wrench. (Spider might be end of line, i’m not sure).
@@PeakTorque i’ve just tried to fit the crank arms and the spider together. Interestingly, the crank arms only fit one way which is in the NHB (Non Hidden Bolt) configuration, how i want it. BUT when I insert the crank arms, the play between the 8 bolt interface seems enormous (like 0.25 mm all the way round), it is a non existent fit. So clearly all the torque forces will go through the 8 bolts themselves. What do you think? It seems a bit odd, but i’m not sure.
@@likemarksee according to SRAM your swap is not compatible... support.sram.com/hc/en-us/articles/360049922554-Can-I-Change-My-Power-Meter-From-GXP-BB30-or-DUB- But if you've got it working then yes the spline is a loose fit, the bolts need to be torqued up properly and this will provide the friction surface for the torque transfer. Dont grease those bolted surfaces.
@@PeakTorqueinteresting as cycle power meters told me what crank arms i needed to buy (D1 crank arms)….i’ll get on to CPM and SRAM tomorrow, to see what both say. Disappointing and also a headache if they’re not compatible (bought separately) 🤦♂️.
You sound like you believe this could be solved through adaptation of the calibration process, do you think the big/small variation could get to the magical +/- 1% through calibration and software or is it just beyond the fundamental limit of the hardware?
Question: Do you know if the Quarq DFour Powermeter is compatible with Shimano R7000 rings and a 5800 FD? I read somewhere that the inner-ring spacing was changed with the r7000 but not sure what impact that would really have. Thoughts?
sounds great, but established western brands sell spider-based PMs for roughly the same price, why would i buy this one? i can get a full chainring PM from rotor for 630€ right now
Maybe I was unlucky because my Rotor S3 stem snapped with no warning and a torque wrench was used. So I would never have anything to do with Rotor. Pile of shite
I see overestimating my power as a positive
buy this power meter for a higher FTP
😂What’s not to like about the most powerful power meter on the market?😂
If you like riding slower than you think…
Where’s the best place to buy these from the UK? Struggling to find a single UK based retailer, and very much don’t want to get stung with customs charges.
I've got the Sigeyi power meter. I'm using it with a "cheap" ZRace crank I put on my old Synapse. I've never noticed it reporting power much differently than the Shimano power meter on my Dura Ace crank on my new bike and my Kickr. It is probably different by some amount but close enough for me.
It would be interesting to see a comparison of the data on the L/R power balance between your pedal based measurements and the sigey. The pedal based L/R power readings are supposed to be more accurate than the spider based readings since the spider makes an assumption that for 1/2 a turn the one side and for the next 1/2 the other side is the power generating element, whereas the pedal based power meter is much more specific and direct.
My sigeyi power meter on my SRAM Force AXS crank has been solid. And it's easy to charge. No complaints so far going into its second season
I'd love to hear your thoughts on the Lemond 8. Especially the foam core fork and the carbon t47 bb.
I have 2 Sigeyi PMs, one on my 1by gravel bike, one on my 2by road bike. On the 1by its fine. On the 2by the bigger chainring ran a couple of watts higher when I tested it against my smart trainer over a 40 min steady state low power workout (eg 184 w vs 188 w), The smaller chainring matched the smart trainer perfectly (eg 184 w vs 184 w). I will do more tests with higher power.
I have a very similar setup, but I use the rotor 30mm cranks and a XCadey powermeter instead of SIGEY. (They look almost identical though).
I have very good results with it !!! Compared them to POWRLINK pedals they are spot on, also compared them with a KICKR (that is a good match to stages and 4iiii powermeters) and also everything within tolerances.
Just needed to adjust the offset a bit on the app in the beginning, have been strong since.
I am using a sigeyi power meter since nearly 3 years now without any problems (3 bolt SRAM interface) I am doing around 5000 miles a year and typical rides are 5-6 hours. Battery lasts probably for 3 to 4 of those rides although I charge it after every ride.
Thanks.
Would the results be different with other chainrings?
A Spécialités TA chainring might be a bit less stiff as the Shimano chainring, which might cancel out the difference at the spider.
personally, i've had some bad expieriences with the data during sprints. the accelerometer did not capture the cadence correctly, sometimes dropped completely, giving some really bad readings. i've contacted sigeyi uk, from where i bought the device, and got no response at all.
changed it for the good old SRM DA 9000 with magnet based cadence sensor, ultimately,
I use Sigeyi AXO on MTB and experience power spikes and a slightly higher average output. I also experience higher variation in cadence and believe the power spikes is related to high torque and issues in the cadence measurement
I'm using oval rotor chainrings, yes those 'aero' ones that flex a ton when sprinting. What would be a better power meter with oval chainrings?
I know that team Sky had problems back in the day when they started using oval chainrings, which started the hype about them.
Rotor own power meter is able to compensate for the oval chainrings. At least it's what they say
Would be interesting to also see some analysis of the Xcadey spider power meter in comparison to this, its available at a very similar price to the Sigeyi. They seem to manufacture their own 24mm crankset too which could be another option over Shimano that doesn't split in half.
This mechanical rim brake bike is making a mockery of modern super bikes.
I use two of them, super reliable, in 50+ rides only one spike, exceptionally good battery life.
What about the power update cycle? I use a Xcadey spider based powermeter with the xcadey cranks with a Fenix 6 GPS watch for my road cycling.
While I do really like the build and ease of use of the xcadey combo I wonder why my data is only updated every couple of seconds. To be more precise it is every 4 seconds and it takes time to get used to adjusting my power to the adjusted training load due to the disconnect of leg burn and power display
I used my first Sigeyi for just over a year before it started reading way to much power. Got in touch with Sigeyi and at first they didn't want to replace it under warranty (the warranty is only 12 months). After some e-mailing they agreed to replace it after I destroyed mine and sent them proof. The new powermeter seems to work just fine for now, I'd like to see how this one holds up !
is it still work?
Works fine !
What model of sigeyi I need to buy ( i have ultegra r8000)
Well old SRM PM6 or Sigey for same price?
Did we notice following page 6:24 data shows one lag behind another, consistently? Looks like the paddle based system is lagging. Any advice insight?
is there a firmware update that can refine the noise?thanks
Nice review and it's great to see power meters becoming more affordable.
I feel that GXP is practically dead here. Not just down to it's poor design (thanks Hambini) but DUB has superseded it. And with Shimano pretty much being the go to standard. So I'll go for a pedal based power meter as I've got GXP tied round my neck.
Hambini might not like GXP, but I doubt he likes DUB either. Proprietary 29mm bearings make it almost impossible for anyone other than SRAM to make compatible bottom brackets. A DUB bottom bracket in a 41mm shell is a bit of squeeze and hardly likely to be optimal. The Truvativ/GXP system has been around for a very long time and has worked fairly well, certainly much better than BB30 (for example). Both DUB and the new SRAM 12 speed system turns me right off.
(But do not for one minute think that Shimano are perfect either; hash tag ‘thanks shimano’).
I have always liked SRAM group-sets, but i don’t like the direction they are going now. It’s such a shame, as if SRAM can’t play nicely to ensure the inter-compatibility of parts with third parties (like Hambini for example) maybe it’s time to switch.
@@likemarksee Nothing is really stopping you from using a standard 6806 bearing and shim, which is what all the chinese BB manufacturers do. But thats 42mm OD though, not 41mm shell.
your pronounced Sigeyi perfectly, unlike many other reviewers
What are the technical benefits of spider-based power meter over pedal-based? Meaning, pedals are way easier to swap between bikes, one can use any crankset one needs/prefers etc. Also, eventually everything breaks so it's easier to swap pedals than spider. So, is there some advantage over pedals?
And sorry if my question sounds biased towards favoring pedals, it's just I'd like to know why spider.
Robustness and repeatability. No moving parts, no bearings, no threads, no wear. All those things can affect pedal based strain gauge calibration over time.
@@PeakTorque Thank You very much for Your reply. Good to know technical considerations between those (plus crank) platforms. Thanks again. 👍
Thanks for the review. How much power reading error do you think using a 1x12 drivetrain would cause? That would add considerably more horizontal chain angle, but a 40T or 42T chainring would be right in between say, a 34-50 double.
I love my sigeyi. Such a good option with the zrace crankset.
I'm using the magene p352 and unfortunately I can't compare it to another Meter on the road. My gripe with the magene is the chainrings use the 8 bolt pattern with limits the option for alternative rings. After watching this is most likely buy the Sigeyi.
so then favero assioma pedals are not worth it compared to a spider based power meter if I understand correctly?
You can buy a GXP Quarq (in the UK) i bought one last week. You just need to buy the DUB Axis spider and the crank arms separate. Surprisingly quite good value too.
Interesting, the dub spider definitely fits to the gxp crank? Are you sure?
@@PeakTorque yes, i bought compatible sram force GXP crank arms from cycle power meters for 199 and a 130BCD DUB spider (elsewhere) for 284. I thought that was good value. I have not assembled it yet as i need to a torque wrench. (Spider might be end of line, i’m not sure).
@@PeakTorque i’ve just tried to fit the crank arms and the spider together. Interestingly, the crank arms only fit one way which is in the NHB (Non Hidden Bolt) configuration, how i want it. BUT when I insert the crank arms, the play between the 8 bolt interface seems enormous (like 0.25 mm all the way round), it is a non existent fit. So clearly all the torque forces will go through the 8 bolts themselves. What do you think? It seems a bit odd, but i’m not sure.
@@likemarksee according to SRAM your swap is not compatible... support.sram.com/hc/en-us/articles/360049922554-Can-I-Change-My-Power-Meter-From-GXP-BB30-or-DUB-
But if you've got it working then yes the spline is a loose fit, the bolts need to be torqued up properly and this will provide the friction surface for the torque transfer. Dont grease those bolted surfaces.
@@PeakTorqueinteresting as cycle power meters told me what crank arms i needed to buy (D1 crank arms)….i’ll get on to CPM and SRAM tomorrow, to see what both say. Disappointing and also a headache if they’re not compatible (bought separately) 🤦♂️.
You sound like you believe this could be solved through adaptation of the calibration process, do you think the big/small variation could get to the magical +/- 1% through calibration and software or is it just beyond the fundamental limit of the hardware?
Well, it is do-able. I do not see this variation so much in the quarq or p2m that i own.
Assioma-ultegra + rotor + sigeyi + ultegra - mix and stir! :-D
四个亿，I am using it
Question:
Do you know if the Quarq DFour Powermeter is compatible with Shimano R7000 rings and a 5800 FD?
I read somewhere that the inner-ring spacing was changed with the r7000 but not sure what impact that would really have.
Thoughts?
sounds great, but established western brands sell spider-based PMs for roughly the same price, why would i buy this one?
i can get a full chainring PM from rotor for 630€ right now
The Sigeyi goes for under $300, less than half of most big brand spider based PMs.
Maybe I was unlucky because my Rotor S3 stem snapped with no warning and a torque wrench was used. So I would never have anything to do with Rotor. Pile of shite
"So getting that head stuck in those tight spots"
alright mate
New video