I would most likely use a rotor crankset with it’s 1x chainring
The only thing sram would be a XG-1290 cassette
I would have preferred the 105 di2 but the real reason I’m making the change is to have the buttons on top of the shifter, the 105 isn’t available with that.
The bike will have power pedals, so crank options are endless
AFAIK the cog spacing is different and you should not use Shimano chains with SRAM chainrings and cassettes. Just stick to SRAM gear.
BTW, I have been running 1x12 on my road bike for two years, I couldn’t be happier. It is silent, shifts are quick and the ratios on my 10–36 cassette great.
Rotor cranks are really good, too. I have not used their chainrings with a SRAM drivetrain, but with my 1x11 XTR drivetrain. The quality is easily Red/XTR/DuraAce level. If anything, my Rotor chainring is markedly stiffer than the XTR chainring it replaced.
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I also have been on a 1x11 system on my road bike for 3 years now and as I said, its perfect for me and my terrain.
I guess I can try a 50 x 11-36 cassette on the bike, I could also just put SRAM on the bike but I really have a hard on for top toggles on the shimano shifters as I ride fist over hoods and that’s a critical shift point for me.
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I think I mentioned this on another thread somewhere, but just for clarity.
I don’t offer any paid services to any companies I review, or basically any company that makes any product for that matter. I’m happy to have chat with them, discuss their product ideas under NDA, and tell them what’s gonna work or not. This has been true for tiny 1-person companies with just an idea, all the way up to Garmin/Apple/GoPro/Peloton/etc… Usually, this is just a phone call or two per quarter per company, or testing early versions of products.
However, at the end of the day, I don’t get paid by any of them, and in fact even pay my own travel airfare/hotel/car if I visit them (I’ve spent over $5K in airfare/hotel/car in just the last 3 weeks alone to Apple/GoPro/SRAM things). And if I speak at corporate events (like Garmin/ANT+/etc…), then my speaker fee goes to a sports-related charity.
Further, I send everything back. Or at least, try to. These days getting companies to pickup things or generate shipping labels is nearly a full time job. Else, they sit in piles of boxes until they get around so sending a label. I go out and buy my own stuff usually shortly after release (like the Zwift Play controllers, I bought one yesterday evening, shipped today, here tomorrow).
Same goes for advertising. I don’t accept money from any company that I would review products from (either currently or potentially eventually). Likewise, I don’t do any affiliate deals directly with any company. For example, Zwift has an affiliate program - but I specifically am not part of it (they offered), as I want to avoid a scenario where someone says (imaginary numbers) “Zwift pays 15% and Wahoo pays 14%, thus you always recommend Zwift over Wahoo!”. Instead, people can buy on Amazon/REI/Pro’s Closet/etc… and it’s just all flat-rate there. If you want to buy $1,000 worth of toiler paper, that’s generally the same as buying a $1,000 trainer (actually, it’s usually more).
The singular area where I do consulting is for Wall Street/Investment companies that are looking for a consolidated view of where I think the market is heading. In other words, I take the 15,000-word reviews (but all of them), and consolidate it down to a 15-20 minute conf call.
(Oh, and I guess this would be good time to mention that I try really hard to make the wall as solid as possible from a separation standpoint. Obviously, that costs a boatload of money. So, if you do find what I do useful, simply using the links at the end of posts is awesome, or being a DCR Supporter too. Or, just saying Hi if you see me around. 
)
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A few days ago, Shimano released a firmware update for the R9200-P that is supposed to improve accuracy: Firmware Update to Improve the Power Meter Accuracy
I just updated the firmware. I guess I’ll take my Rally pedals off my gravel bike and flip to road-mode and do some triple recording: R9200, Kickr V5, and Rally.
In a couple of spot tests I did, my R9200-P seemed to do reasonably well:
Sweetspot:
Ray’s 30-30 test:
Eventually I got lazy and called it good enough, but this may be impetus to be less lazy. I’ve got VO2 on the docket tomorrow, so I’ll at least dual record with the Kickr and R9200-P.
Tagging @dcrainmaker and @gpl
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Nice. I’m gonna try and get it mounted up on Monday, and updated.
The main/first test I’ll do is 30x30, but do first 4x in small ring, and then second 4x in big ring. Keep cassette in middle somewhere the whole time. That test easily destroyed it last time.
I’m kinda mixed on how they’re fixing it. On one hand, I don’t really care how a company arrives at an accurate product. On the other, this clearly seems like a half-baked solution. If it works, great, but I suspect it’s the edge cases it’ll still struggle in. Finding those edge cases will take some time.
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I’m not familiar with the past issues, are they saying that they can use the gear position data to subtract the chain forces on the crankset?
If so, that doesn’t seem like too bad of an improvement, although makes you wonder if the data will skew when installed on different frames with different rear triangle stiffnesses (maybe they’re all within a negligible range though).
So after getting another unit unmounted, spending a very long time trying to find where the heck I put the older magnet, finding a new magnet solution from some neighbor offices, and then getting it all mounted…the firmware doesn’t seem to be live anymore.
Would be curious if anyone else with a R9200P is being offered the 4.2.0 firmware. The app very much knows that there’s a new accuracy fix, as it keeps suggesting I turn on all those features, but says the unit is fully up to date when I check for firmware, despite having the older firmware on.
I’ve shot Shimano a note, but my guess is that’ll be a day or so game of telephone as they connect with Japan and back. Would be curious for anyone with an R9200P that hasn’t updated yet, if it still shows an available firmware for it.
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When I updated, the app originally prompted me from the power meter but I then I think the update happened for the derailleur, if that makes sense. As we all know, the e-tube app is dreadful.
It’s off by 5-20% depending on the viewer’s circumstances.
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Yeah, there’s actually two updates and some linking that needs to happen. In a nutshell, the order of operations are:
- RD has to be updated to the firmware from last spring
- RD has to be toggled into dual ANT+/BLE mode (happened by default for me)
- PM has to be on 4.2.0 (yours is, mine is on a previous version, but won’t update beyond that)
- Then the app goes through this little linking checklist, attached, and then links them together. In fact, mine even thinks it can do that, but of course, it then fails when it finds the real firmware of my PM is 4.14.80 and showing as latest.
Either way, Shimano is on it, and digging into why it’s not showing up.
Hi,
once confirmed that the last update has solved the accuracy problems and I am really waiting with great interest your test, do you think that, in near future, the new groupset will be sold already updated?
thanks
Flavio
Shimano: the content cow that keeps on giving 
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Thanks for doing the leg work on this for us Shane. Clever tactic removing the FD too. Much appreciated!
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That it doesn’t work isn’t surprising, all power meters and trainers need extensive factory calibration to ensure accuracy. Pushing out an update that applies correction factors without calibration of individual units seems like an amateur move. (I’m not a power meter engineer, but I work with data in my job.)
idly wonders how much time and money went into the “fix” that isn’t a fix
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Do PR CYA’s ever pay for themselves?
Any new updates on this? I am debating if I should buy a Dura Ace 12-speed or a new SRAM Force (w/ power meter). Both bikes are in my price range.
Order whichever group you like more. You can add a third-party PM to the DA.
I’ve had a poorly timed (for the purposes of this) break from training (returning shortly!). My limited comparisons prior to the break showed that my R9200P was actually pretty darn good, but I also think it was working well pre-update.
Here is a 3 hour trainer ride. Interestingly, it seems like my Rally pedals have been reading 10 W lower than my Kickr and Shimano.