Whoa. I just went and read the specs again on the Kickstarter page. They add a TON of Q-factor - 16mm to each side. That's essentially adding more than 0.6" spindle length to each pedal! That's an incredible amount of additional Q-factor and is likely going to cause pain in hips or knees - I know it would for me. I went through experimenting with different wider Q-factors a couple of years ago and wound up with a pretty sore right hip until I got things back to normal.

I do think that a relatively normal Q-factor variants (few millimeters) do lead to adaptation and I get that different bikes have different Q-factors, but this is a giant difference on the same bike over the pedals one used before. A lot of the tech in all of the other pedals involves getting the electronics and strain gauges into the pedals but without a big impact on Q factor. Most of them run around 53-56mm on the other pedal based power meters.

To put some numbers on this, I ride Speedplay, which has a standard spindle length of 53mm but offers a shorter version down to 50mm and longer versions to 65mm. If you were to take stock pedals at around 53mm spindle length and add 16mm to them you'd have a 68mm spindle that is 3mm beyond the longest spindle length Speedplay offers or you'd have to buy new pedals (special order) at 50mm to just get to the max Speedplay spindle length of 65mm - which is still a gigantic Q-factor. The reason I spent a lot of time figuring this out for me was to accommodate a old knee injury. I finally got it dialed in with a spindle length of the standard 53m on one side and bumped out the Q-factor on the other side to around 58mm. When I went to large Q-factors, I wound up with persistent hip pain that took months to fully resolve after just riding with it wider for a couple of weeks. Don't want to repeat that situation again.

Based on that, I wouldn't touch these with a 10' pole. Good idea, but a terrible implementation, IMO. I predict this isn't going to have very wide acceptance and that will cause them problems with the product's survival. That Q-factor change this huge is going to be a show stopper for most riders who are looking for power meters, I'd guess. Riders who are willing to buy a power meter tend to be oriented to the performance end of things and are tuned into specs like this.

J.