I am looking at the Pioneer powermeter for my Cervelo P5-6. The Pioneer website cautions about 10mm clearance between the non-drive crankarm and the chainstay. My P5 has a Wheels Manufacturing BB (http://wheelsmfg.com/bottom-brackets/bbright/bbright-out-bottom-brackets/bbright-out-angular-contact-bb-for-24mm-shimano-cranks-black.html) with Shimano Durace Cranks. I am hoping someone has successfully installing a Pioneer powermeter on a P5 with a similar BB-crank set up?
Mine had plenty between arm and stay, but it didn’t clear my brake. (Cannondale Slice). I ended up filing my brake down (the part where the cable screws to the brake) about 1/16" to get the clearance I needed. So make sure you have enough space there.
Otherwise it was a breeze to install.
Dual sided pioneer fitted my s5 ok, thought I fitted the magnets on the inside of chainstays via hole in bottom bracket ( if you are using magnet the orientation of the poles matter)
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I might be off on this, but I “think” a lower profile version is on the way, and should take care of any clearance issues.