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Buying a Crankset-Based Power Meter These Days

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Buying a Crankset-Based Power Meter These Days

Old 09-27-20, 01:50 PM
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Metallifan33
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Buying a Crankset-Based Power Meter These Days

So, for various reasons, I'm in the market for a crankset-based, dual-sided, PM (Shimano compatible). I've looked for
  1. Pioneer - They shut down their op and sold to Shimano earlier this year apparently. ("out of stock. Discontinued")
  2. 4iiii - Every option is "out of stock"
  3. Stages - You guessed it; "out of stock"
  4. Shimano - I've heard there are some issues (from GP Llama specifically).
At this point, I'm thinking I'm just going to have to wait it out, but I thought I'd check here and see if you guys have any ideas.
I'm looking for dual power and Shimano compatible. The bike is a 2020 Domane (with the newer style BB).
Thanks!
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Old 09-27-20, 01:57 PM
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Several of my friends LOVE their Power2Max crank-based PM.

I am suspecting that the global pandemic is affecting supply chains and making it tough to find much of anything.
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Old 09-27-20, 02:07 PM
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Originally Posted by datlas View Post
Several of my friends LOVE their Power2Max crank-based PM.

I am suspecting that the global pandemic is affecting supply chains and making it tough to find much of anything.
Thanks datlas ! I'll check 'em out.
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Old 09-27-20, 02:13 PM
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I have a pile (ok, trio) of Quarq DZeros and DFour91s that have been flawless, and apparently available in DUB format through Competitive Cyclist at least. You'd need the spider and arms, and make sure to get a compatible bottom bracket if you go that way, but it's my first choice in PMs.
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Old 09-27-20, 05:07 PM
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Have you tried Powermetercity.com ? I just bought a Stages gen3 R7k 105 a week ago.
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Old 09-27-20, 05:15 PM
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Power2Max or Quarq. You don't really need dual-sided so much as you want full power (as opposed to the double of one side). P2M (and Quarq, I assume) can give you quasi-dual-sided (it costs a little extra coin for P2M) but I don't see much value in it.
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Old 09-27-20, 06:00 PM
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I'll third Power2max. Not from personal experience, I went with pedals for reasons that don't apply to you. But I did my homework and P2M was a better choice in several ways that probably do apply to you.

And @WhyFi is right about total power being measured vs dual sided. I'll cosign that advice too.
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Old 09-27-20, 06:55 PM
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Quarq can give pseudo-balance, yes. But also yes, you don't actually care. Unless you're rehabbing a serious injury, it's a non-factor. You do care about total power, and I do think a single spider PM is better than two crankarms for that purpose.
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Old 09-28-20, 07:49 AM
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Used SRMs are always an option too.
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Old 09-28-20, 08:30 AM
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Is the Easton Cinch any good? I have one, and it seems fine, but I don't really know anything about powermeters.
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Old 09-28-20, 08:48 AM
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Originally Posted by datlas View Post
Several of my friends LOVE their Power2Max crank-based PM.

I am suspecting that the global pandemic is affecting supply chains and making it tough to find much of anything.
May I be your friend? I love mine too. They are Shimano compatible, multiply configurable (4 and 5 bolt) relatively cheap, and available.
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Old 09-28-20, 08:55 AM
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Originally Posted by MoAlpha View Post
May I be your friend? I love mine too. They are Shimano compatible, multiply configurable (4 and 5 bolt) relatively cheap, and available.
We can still be friends.
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Old 09-28-20, 08:58 AM
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Originally Posted by datlas View Post
we can still be friends.
+1 p2m
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Old 09-28-20, 08:58 AM
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+1 p2m
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Old 09-28-20, 09:01 AM
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Originally Posted by Seattle Forrest View Post
I'll third Power2max. Not from personal experience, I went with pedals for reasons that don't apply to you. But I did my homework and P2M was a better choice in several ways that probably do apply to you.

And @WhyFi is right about total power being measured vs dual sided. I'll cosign that advice too.
Has anyone come out with powermeter pedals that work with SPD yet? I really like may Campy triple with square taper bottom bracket and no one seems to make crank-based meters that work with that.
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Old 09-28-20, 09:05 AM
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Originally Posted by himespau View Post
Has anyone come out with powermeter pedals that work with SPD yet? I really like may Campy triple with square taper bottom bracket and no one seems to make crank-based meters that work with that.
That's the question. I bet they'd sell a lot if they were priced competitively. I'd probably buy 2 pairs.

Shimano needs to get on that ASAP. Especially since they pretty much ruined any crank-based powermeter used on their 4 arm designs.
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Old 09-28-20, 09:09 AM
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Originally Posted by himespau View Post
Has anyone come out with powermeter pedals that work with SPD yet? I really like may Campy triple with square taper bottom bracket and no one seems to make crank-based meters that work with that.
Apparently there is a hack/bodge you can do with Assiomas to retrofit onto SPD, I imagine there is a YouTube video that shows you how. I don't think anyone has an off-the-shelf version yet though.
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Old 09-28-20, 09:10 AM
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Originally Posted by himespau View Post
Has anyone come out with powermeter pedals that work with SPD yet? I really like may Campy triple with square taper bottom bracket and no one seems to make crank-based meters that work with that.
The only ones I've seen IRL are the assioma duo xpedo hacks.
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Old 09-28-20, 09:11 AM
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Originally Posted by rubiksoval View Post
That's the question. I bet they'd sell a lot if they were priced competitively. I'd probably buy 2 pairs.
You and me both.
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Old 09-28-20, 09:25 AM
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Originally Posted by Bah Humbug View Post
Unless you're rehabbing a serious injury, it's a non-factor.
I've never understood how one would use that information even if rehabbing from a serious injury. I've had to rehab from two semi-serious injuries over the years that I've had a (total power measuring) power meter and I'm not sure how that information would have helped. Can you explain? I also have a friend who had to have one leg amputated slightly above the knee. How could he have used specfiic sided information to aid his rehab?

[Edited to add:] Both injuries left me with obvious bilateral asymmetries. One involved sciatica, which weakened my entire right leg and foot. The other involved a bike accident, where I received brain trauma and significant losses on my left side (but, unhappily, also broke my right ankle). I had power data prior to each incident, so I could see a huge loss in my total power (in addition to the obvious difficulty walking up stairs or being able to control my bad leg and foot). In each case, when I was able to get back on the bike, I just worked on returning my total power to where it was, and walking up and down stairs without dragging the bad foot.

Last edited by RChung; 09-28-20 at 09:36 AM.
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Old 09-28-20, 09:50 AM
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Originally Posted by RChung View Post
I've never understood how one would use that information even if rehabbing from a serious injury. I've had to rehab from two semi-serious injuries over the years that I've had a (total power measuring) power meter and I'm not sure how that information would have helped. Can you explain? I also have a friend who had to have one leg amputated slightly above the knee. How could he have used specfiic sided information to aid his rehab?
This is a good point. Presumably, riders with two legs would set progressive targets for the weak side and monitor progress.

Anecdotally, I’m a neurologist with a research background in neurorehabilitation and partial atrophy of the left quad from an old disc herniation. All I do is force myself to use that leg hard on the bike and in the gym and watch the bulk come slowly back over the years.
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Old 09-28-20, 10:23 AM
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Originally Posted by MoAlpha View Post
This is a good point. Presumably, riders with two legs would set progressive targets for the weak side and monitor progress.

Anecdotally, I’m a neurologist with a research background in neurorehabilitation and partial atrophy of the left quad from an old disc herniation. All I do is force myself to use that leg hard on the bike and in the gym and watch the bulk come slowly back over the years.
Plus, that gives you a handy-dandy excuse for cycling mediocrity. Got one for me??

Back on topic, I agree that the dual sided data is probably not actionable so of very little value other than "knowing" your efficiencies. It won't change anything. I know someone who works for a certain company that rhymes with "ages" and he admits that they sell double-sided meters purely for customer satisfaction, and that single sided are all anyone really needs.
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Old 09-28-20, 10:39 AM
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Originally Posted by datlas View Post
Plus, that gives you a handy-dandy excuse for cycling mediocrity. Got one for me??.
Haha, Don't forget I'm ten years older than you are too.

How about, your genetics are associated with other, more real-world-fitness-promoting, traits and you'll dance on all of the fast peoples' graves?

Actually, at >7000 mi/yr, you don't need many excuses.

Last edited by MoAlpha; 09-28-20 at 10:42 AM.
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Old 09-28-20, 11:02 AM
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Originally Posted by kingston View Post
The only ones I've seen IRL are the assioma duo xpedo hacks.
That looks like a decent (and relatively affordable) idea. Hadn't see that before, thanks.
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Old 09-28-20, 11:07 AM
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Originally Posted by RChung View Post
I've never understood how one would use that information even if rehabbing from a serious injury. I've had to rehab from two semi-serious injuries over the years that I've had a (total power measuring) power meter and I'm not sure how that information would have helped. Can you explain? I also have a friend who had to have one leg amputated slightly above the knee. How could he have used specfiic sided information to aid his rehab?

[Edited to add:] Both injuries left me with obvious bilateral asymmetries. One involved sciatica, which weakened my entire right leg and foot. The other involved a bike accident, where I received brain trauma and significant losses on my left side (but, unhappily, also broke my right ankle). I had power data prior to each incident, so I could see a huge loss in my total power (in addition to the obvious difficulty walking up stairs or being able to control my bad leg and foot). In each case, when I was able to get back on the bike, I just worked on returning my total power to where it was, and walking up and down stairs without dragging the bad foot.
Are you asking what I would do, or are you passive-aggressively setting up the expectation for having a peer-reviewed journal study?
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