Spider Based Power Meter for Shimano 12sp

[BigBoyND]

so what crankarms are being used with Quarq total system weight vs P2M with RotorCarbon crank arms. DA is quite heavy at 750gm

Red DUB is the way to go, imo. Even lighter than EC90SL and Aldhu Carbon, and it's cheaper. My Red DUB 170mm arms with Quarq Dzero weighs 464g.

[spartan]

can you show us pics with mounted DA chainrings

so what crankarms are being used with Quarq total system weight vs P2M with RotorCarbon crank arms. DA is quite heavy at 750gm

Red DUB is the way to go, imo. Even lighter than EC90SL and Aldhu Carbon, and it's cheaper. My Red DUB 170mm arms with Quarq Dzero weighs 464g.

[pdlpsher1]

I'm not sure if Quarq is the lighest option now. I had a DFour (30mm axle) with 50/34 rings that weighed 723g complete with battery. This is with the light version of the carbon arms (170mm). Below is the P2M weight as a comparison.

P2M NGeco 110-4SL 125g.
Rotor carbon arms 170mm with preload adjuster 249g.
30mm axle 95g
Chainrings and bolts (50/34) 132g
Total: 601g

The NG 110-4SL is even lighter at 118g.

[BigBoyND]

I'm not sure if Quarq is the lighest option now. I had a DFour (30mm axle) with 50/34 rings that weighed 723g complete with battery. This is with the light version of the carbon arms (170mm). Below is the P2M weight as a comparison.

P2M NGeco 110-4SL 125g.
Rotor carbon arms 170mm with preload adjuster 249g.
30mm axle 95g
Chainrings and bolts (50/34) 132g
Total: 601g

The NG 110-4SL is even lighter at 118g.

With what arms did you get 723g? Def not "the light ones." With the Red or Quarq D1 arms it's 464g. 602g with Praxis rings and bolts.

But honestly, I'd get the P2M SL if the goal is to use Shimano rings. P2M gets a great reputation for durability and it's made in Germany (a place I don't mind sending my money).

[BigBoyND]

can you show us pics with mounted DA chainrings

Dzero is the 5 bolts version.

But there are pictures by others of the Dfour in the DA thread

[tleo]

I have P2M NGeco's on both my road bike and MTB. 2.5 years on the road bike, 7 months on the MTB. Road bike has 24mm ALdhu cranks and MTB has the stock SLX cranks that came with the bike. Never had an issue with either. The worst I can say about them is the OEM battery on the MTB only lasted 6 months. Usually change them once a year. Who knows how long it sat on the vendor shelf before I bought it.

[pdlpsher1]

With what arms did you get 723g? Def not "the light ones." With the Red or Quarq D1 arms it's 464g. 602g with Praxis rings and bolts.

But honestly, I'd get the P2M SL if the goal is to use Shimano rings. P2M gets a great reputation for durability and it's made in Germany (a place I don't mind sending my money).

I no longer have the PM. I bought it new in 2017 as a PM package. So I assume it's the light arms. I'm under the impression that Quarq started using the heavier arms last year. Also, my PM is the DFour not the DFour1. I'm not sure if that makes a difference or not. I don't think 30mm vs. DUB makes a huge difference. I loved my Quarq. I have had two and without any issues. I was merely pointing out there's another lightweight option out there. I've moved onto using GRX cranks and I'll be getting the new P2M GRX PM.

[Stueys]

I'm running a Rotor Aldhu Carbon with a P2M NG eco 4SL with 9200. Nice lightweight option and P2M is always faultless (I've also got a Type S (5 years and counting) and another NG Eco).

You can run Shim chainrings on the 4SL and the Aldhu comes in a 24mm version.

[FlatlandClimber]

Weight for the whole crank (175mm), functional Pm and
50/34 rings is 651g.
The native Shimano is 685g without PM, and 745g with PM.

The price when I ordered the Quarq was just too good.

The same scratched crank later went on the TT bike (had been on my gravel bike for 2 years):



The not so cheap option:




Don't know exactly but easily sub 600g on the entire system, with 52/36 rings.

The Quarq is definitely my go zo option. Light, easy to install, cheap, and has never once let me down. GPLama also regards it as the most reliable system next to the Assioma duo pedals.

[BigBoyND]

I no longer have the PM. I bought it new in 2017 as a PM package. So I assume it's the light arms. I'm under the impression that Quarq started using the heavier arms last year. Also, my PM is the DFour not the DFour1. I'm not sure if that makes a difference or not. I don't think 30mm vs. DUB makes a huge difference. I loved my Quarq. I have had two and without any issues. I was merely pointing out there's another lightweight option out there. I've moved onto using GRX cranks and I'll be getting the new P2M GRX PM.

I just don't want the OP to think with light arms it's 724g, if they buy this setup. 30mm (GXP) is 60g heavier than DUB for Red level. Force GXP, which Quarq switched to a few years ago and is also carbon, is 160g heavier than Red DUB.

[milanv]

can you show us pics with mounted DA chainrings

so what crankarms are being used with Quarq total system weight vs P2M with RotorCarbon crank arms. DA is quite heavy at 750gm

Red DUB is the way to go, imo. Even lighter than EC90SL and Aldhu Carbon, and it's cheaper. My Red DUB 170mm arms with Quarq Dzero weighs 464g.

Nevermind...

[henau212]

GP Lama bought a pair of DuraAce 9200 power cranks. let us see what he reports on accuracy.

so what crankarms are being used with Quarq total system weight vs P2M with RotorCarbon crank arms. DA is quite heavy at 750gm

Would not wait on that. DC already said that the data of his test sample is inaccurate and he is in contact with Shimano about the data. Would be a miracle if GP Lamas is any better.

I don't see anything positive for the Shimano PM: not the price, the weight or the quality of the PM. I am still baffled that they did not just use the Pioneer tech and be done with their problems.

[BdaGhisallo]

GP Lama bought a pair of DuraAce 9200 power cranks. let us see what he reports on accuracy.

so what crankarms are being used with Quarq total system weight vs P2M with RotorCarbon crank arms. DA is quite heavy at 750gm

Would not wait on that. DC already said that the data of his test sample is inaccurate and he is in contact with Shimano about the data. Would be a miracle if GP Lamas is any better.

I don't see anything positive for the Shimano PM: not the price, the weight or the quality of the PM. I am still baffled that they did not just use the Pioneer tech and be done with their problems.

Ray's test model was, I believe, a pre-production model and was procured almost a year ago. GP Lama just bought a production model a few weeks back. A lot can change in the tech in 10 months.

I know Ray mentioned that he has a new DA PM in for testing but I haven't seen him mention any results on this unit. I am looking forward to reading his feedback and hearing from GP Lama before reaching a final conclusion on Shimano's new units. I hope they can get them sorted.

[henau212]

GP Lama bought a pair of DuraAce 9200 power cranks. let us see what he reports on accuracy.

so what crankarms are being used with Quarq total system weight vs P2M with RotorCarbon crank arms. DA is quite heavy at 750gm

Would not wait on that. DC already said that the data of his test sample is inaccurate and he is in contact with Shimano about the data. Would be a miracle if GP Lamas is any better.

I don't see anything positive for the Shimano PM: not the price, the weight or the quality of the PM. I am still baffled that they did not just use the Pioneer tech and be done with their problems.

Ray's test model was, I believe, a pre-production model and was procured almost a year ago. GP Lama just bought a production model a few weeks back. A lot can change in the tech in 10 months.

I know Ray mentioned that he has a new DA PM in for testing but I haven't seen him mention any results on this unit. I am looking forward to reading his feedback and hearing from GP Lama before reaching a final conclusion on Shimano's new units. I hope they can get them sorted.

https://www.dcrainmaker.com/2022/07/the ... rance.html
See comment 9 forward. That thing he is testing is not pre production.

[Visqu]

Sacrilege, I know.
Cranks are 170mm.