I am a long time powertap hub user. They have alway been bombproof, never have dropouts, etc. and I like that it tells me power, along with speed (and cadence, but this isn’t necessary to me) without requiring a Garmin speed or cadence sensor. Not a dealbreaker, though for alternative suggestions.
I also have the latest Dura Ace crankset on my rim braked bike. I am wondering what is a solid, reliable, and accurate other power measuring device, as I’d like to get newer wheels and not necessarily build them around a powertap. I like my pedals, so I don’t want to change those, for a power pedal.
What are my choices? A left arm Stages, which I do understand the inherent measuring deficiencies of doubling a one sided Powermeter. Price is not the biggest consideration, if the powermeter will be reliable and last for many years. Anything else? I’m okay replacing the crank to another crank.
I went through power meter city for my power 2 max with rotor crank. Fits my Shimano chainrings and the price was great. Accuracy and reliability have been outstanding.
I went through power meter city for my power 2 max with rotor crank. Fits my Shimano chainrings and the price was great. Accuracy and reliability have been outstanding.
Tried including pic but I guess I’m not allowed. PM if you would like to see pictures.
Likes is an overreach there. I had to scale up their spider meter by 5% to get reading accurately. Their single left and spider PM (if accurate) seems ok. Their dual sided Shimano is the same as the rest, not something I can reliably use to compare other meters/trainers to.
If I put 4 bolt shimano chainrings on a quarq or power2max, does it have the same issues? Basically is there any way to get accurate, crank-based power using those chainrings?
If I put 4 bolt shimano chainrings on a quarq or power2max, does it have the same issues? Basically is there any way to get accurate, crank-based power using those chainrings?
The issue is with the right Shimano crank arm. If that’s not involved, you’re good. IMO the Quarq/P2M/Rotor spiders with DuraAce rings look so damn nice. (I have a soft spot for most Shimano things).
Likes is an overreach there. I had to scale up their spider meter by 5% to get reading accurately. Their single left and spider PM (if accurate) seems ok. Their dual sided Shimano is the same as the rest, not something I can reliably use to compare other meters/trainers to.
I update this on a regular basis: https://gplama.com/powermeter-guide/ Hi GPLama. I saw the discussion of the right sided crank based issue and wondered if it was mostly higher end (ie Dura race and Ultegra) and with 105 less a problem due to more material, and being a bit heavier? or if they are getting it under control, I know 4iiii have looked at this problem for sure as I believe you mentioned in your video of the problem.
Hi GPLama. I saw the discussion of the right sided crank based issue and wondered if it was mostly higher end (ie Dura race and Ultegra) and with 105 less a problem due to more material, and being a bit heavier? or if they are getting it under control, I know 4iiii have looked at this problem for sure as I believe you mentioned in your video of the problem.
I’m not aware of any power meter company using 105 for dual sided Shimano based systems, so it’s not something I have any data on.
Are they getting it under control… As I understand it, if they could, they would. As discussed by Keith Wakeham in his technical deep-dive on this one, it’s almost impossible to solve with the current design of the Shimano right side crank arm.
What I’m waiting for is the next generation Shimano crank to see if they’ve redesigned things. They’re in a really good position do knock this out of the park next round. And I hope they do.
If I put 4 bolt shimano chainrings on a quarq or power2max, does it have the same issues? Basically is there any way to get accurate, crank-based power using those chainrings?
The issue is with the right Shimano crank arm. If that’s not involved, you’re good. IMO the Quarq/P2M/Rotor spiders with DuraAce rings look so damn nice. (I have a soft spot for most Shimano things).
I’ve got 2x Quarq with shimano rings (1xDA and 1x Ultegra). I’m don’t really worry about the aesthetics, for me it’s about the performance. And that works well. I am sure there are other options that work as well, but for me then the quarqs have worked well over the last 9 years, and on the odd occasions they haven’t then the support has been good.
Likes is an overreach there. I had to scale up their spider meter by 5% to get reading accurately. Their single left and spider PM (if accurate) seems ok. Their dual sided Shimano is the same as the rest, not something I can reliably use to compare other meters/trainers to.
I was specifically thinking of the spider based pm, the impression I got was that you liked it.
Yep, when it was ‘corrected’ it went well. I’m still throwing things at a Sigeyi spider (almost identical to the XCadey) to see how that lines up.
P2M and Quarq seem like the best options in the crank-based pm space though. They’re what I’m leaning towards now.
Agreed on the Quarq (no experience with P2M). If people want a power meter that just works out of the box and does what it says, spend the money and forget the worry.
I watched your positive video review on the quarq dzero dub pm. Do you think this would get the same type of review: quarq dfour dub power meter, with dura ace rings?
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