Powermeter on a Shimano GRX600 crankset?

hi all,

just bought my all new Canyon Grail CF 7.0 SL. It comes with the new Shimano crankset targeted for gravel bikes, the GRX600. I train with powermeter on my road bike, have the Garmin Vector 3 pedal. But that is a road pedal and for graveling obviously SPD pedals are more suitable. So I looked into the Stages Powermeters, seeing if they have anything available for my GRX600 crankset. Alas, they have not. For the GRX810 yes (only available in US, I am living in the Netherlands), but not for my setup.

So I am looking for an alternative. Anyone have any suggestions that do not include changing my crankset?

Thanks in advance, greetings, Derek.

You could send your crankset to 4iiii and they will install their power meters, I have used 4iiii for the last couple of years and have had zero issues. Alternatively you could use a 105/Ultegra left only on your crankset until GRX start shipping with from the power meter companies and then sell it on. Another option is the Asimo pedal which has an Xpedo spindle which means an Xpedo mtb pedal can be fitted but this voids the warranty, there's YouTube videos on it! None are these are really cheap solutions but with 105/Ultegra option you can at least sell it on when you buy a GRX one. Hope this helps. 

Thanks Cycleofaddiction! I will investigate the 4iii option first, have an Ultegra crank arm available so will also experiment with that. Will keep you posted on my progress, thx again for your suggestions.

Do you want both sides or just left?

I'm thinking any of their left side arms that fits your bottom bracket and is the appropriate length should work, no?  105, Ultegra?  Am I missing something?  
(or would that look too funny?)

Yes, I now understand that it's no problem to just do that. Would look a bit weird because of the different colouring, but otherwise just fine. So I'll go for that option.

chas wrote:Do you want both sides or just left?

I'm thinking any of their left side arms that fits your bottom bracket and is the appropriate length should work, no?  105, Ultegra?  Am I missing something?  
(or would that look too funny?)

They've all got Hollowtech II, 24mm spindles, so the road left crankarms should fit to the GRX crank. The possible issue is that the GRX spindle has a 2.5mm wider chainline, so the Q-factor is also 2.5mm wider on both sides. If someone does this, they will have an asymmetric crank. Question is, will they notice it? I would guess most people aren't that sensitive to Q-factor. I am, but I'm one of those darn freaking roadies at heart, and I'm small. Anyway, you can laterally adjust your cleats a bit, so this might help.

I'm a little surprised that Stages and 4iiii will factory install on GRX 800 cranks, but not 600 cranks. Both companies offer 105 crankarms, and GRX 600 is 105 level. The crankarm dimensions should be identical, although I guess the materials may differ slightly. Hopefully they get around to offering the 600 cranks.

Nothing new to add here, just want to confirm that everything said here is accurate with what I've been researching recently.  The road arms will fit the spindle (as will mountain arms), but the Q factor will be different.  It's kind of surprising Stages doesn't offer factory install on the 600 series arms, my only guess would be that they haven't had sufficient time to test that one like they have the 810.  Too bad they don't sell an 810 arm direct (yet)