I’ve got a P2M, bought it second hand and it’s been completely trouble free for years.
They do loads of versions for different cranks so worth checking the website as they’re not too dear new.
Ps. Also got a Powertap back wheel which has been bulletproof too. Disadvantage is if you change between wheels they’re not so good.
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Thought those schemes specifically exclude power meters
Hmm, not sure about that? I know you can get accessories with a voucher now so thought they’d be covered. Possibly not then. Although I’m sure some retailers won’t care much.
Ok so had a look at DCR website and the spindle option seems a bit of a compromise, plus it’s Shimano SPD-SL so still not an MTB specific option.
I’d do a crank based PM but my Kinesis runs SRAM Apex group set so foiled again 
Yes, if the PM doesn’t have proper cadence then the rapid changes is harder to deal with, it will depend a bit on the pedals and your riding etc. if it will have an impact. And I don’t know how assioma processes it (if it samples more frequently than once per revolution then it matters less of course) But it shouldn’t be completely awful, still perfectly good enough, especially on more consistent effort parts even if it gets it a bit wrong on the (crank) accellerations they’re a tiny part of the total ride, especially if you’re just doing gravel rather more extreme off road.
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Thanks Jim. Now I just need to work how I can walk through shyte in Look cleats, or get better at not getting off
What bottom bracket is it though, your apex crankset won’t be able to install a spider, but changing the whole crankset should be feasible, power2max have lots of options that match I’m sure?
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Hmm, I’ll have a look, not sure tbh. Good shout
Also spent the last hour or so looking at all the options again. Pedals just seem by far the most convenient for installing and potentially transferring across bikes/future proofing different bikes or transferring road to tt within 2 minutes. And given I’m probably about to buy a road bike without pedals, that makes the Assioma uno only an extra £200-250, negating most of the savings of going crank.
Settled on Assioma still being king. Final Q is whether I plump for the duos again or rein myself in to unos, knowing I’ll then constantly be questioning the discrepancy.
What’s your L/R power balance like, do you have data from the previous pedals? If you were close to 50/50 would that mean the Uno is fairly reliable?
I’ve got a massive discrepancy, something like 43/57 L/R so I’ suspect an Uno would be useless for me. Even had it pointed out in several lab tests and across various PM’s and Wattbikes.
I’m pretty even, enough for my head to know that it doesn’t actually matter - 48 or 49% left slipping to 46/54 at worst when fatigued. But I initially bought uno and upgraded to duo when I first bought them few years ago just because I knew from wattbike about that imbalance and didn’t enjoy power as much knowing it was off (I know the pm will be inaccurate anyway, but shhh that’s different)
My TT bike came with a L sided stages, and I wonder if me pushing harder on the left side to correct (/overinflate ) the readings contributed to a left hip flexor strain I got shortly after buying it, which has stopped me running properly for about 6-8 weeks.
Pathetic I know, and normally I’m the last person to care about these things, but for some reason this gets me!
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You want the new Garmin Rally pedals, if you wanted latest interchangeable tech that’s designed for that purpose. They’re interchangeable spindles between spld-sl, spd and look keo.
Also if you Google gplama xpedo assioma, you’ll see his video on retrofitting the original assiomas you already have to spd pedal bodies, so that might be an option. It invalidates warranty tho.
Edit - this one: Power Meter Pedals: Favero Assioma // Xpedo SPD Hack // Gravel Power! - YouTube
@Chriswim Vector is discontinued which is probably why they’re cheap. Rally is the current iteration of Garmin power meter.
@gingerbongo as others have said, I have two Power2max. An original classic that’s now on my new Canyon, and a Type S that’s on my TT bike. Neve rhad to touch them at all. Only thing that various people have generally felt over the years is they underread a little bit. Not sure if still true of the newer NG and NGeco models. Doesn’t really bother me, although less ideal for zwift! For racing on that, I use my H3 as the source!
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But not obsolete. From the DCR review:
Garmin Vector 3 is compatible with any of the conversion kits. So if you’ve got a Garmin Vector 3 pair today (which is Look KEO), but you want it to be SPD for your gravel bike or mountain bike – then you’ll just need to buy the conversion kit.
So depending how cheap they are selling them, could be a good deal.
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Good point. Had completely forgotten that from reading the original review. I guess as I have no Look pedals, even buying a discounted set of Vector 3s was never something that would have interested me as I’d have immediately needed to convert them to spd or spd-sl, incurring additional cost and likely negating any saving over just buying Rally new
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What’s the advantage of spider based PM’s like power 2 Max over pedals?
Longer to transfer, so need one for each bike.
More faff on installation
Small risk it won’t be compatible with future bike set-ups?
Thanks. Yikes rally are expensive (compared to Assioma). Also realised even the discounted vectors are still more than Assioma.
I can swap a chainset way quicker than pedals, neither are particularly complicated of course - but how often do you really do it?
I swap my pedals each time I ride a different bike.
So only one in the winter but I do jump between 3 in the summer.
Agreed that both a very straightforward but it is slightly more faff swapping the chain set - also have different size rings on each bike!
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Fair enough, being completely naive on bikes and having never removed a chainset I assumed it’d be harder.
I was taking my pedals to the gym approximately once a week for a while until covid came along.
So had a chance to dual record on my 4iiii 105 left sided power meter and Wahoo Kickr. I was prepared for a hit to the ego and looks like I’ve received it. Did a varied ride with some 0s, some power spikes and different power levels. Zwift is the kickr and fit file is the PM recorded on my Garmin.
Crank shows NP of 18W less than the kickrs
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How quickly could you swap cranks from a BB30 bike to a BB86 bike? 
Which is why people go for Pedal PMs.
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