We got the Vectors to work on our captain's crank, but not the stoker's. The Lightning's 16.9 mm crank arm depth proved a challenge. Eventually the stoker's would have worked, probably, with more filing of the carbon around the crank arm.
The insurmountable problem wasn't the Vector, but the Look Keo style pedals. Mrs. R is a skittish and
inveterate clipper-outer. The one-sided Keo style pedals made it too difficult to repeatedly clip back in. She had used Crank Bros. mountain Candy's before the Keo's, which were two-sided but weren't the greatest.
We returned the stoker's Vectors and purchased
Speedplay Light Action pedals. Mrs. R's joy at finally having easy clip-in/out road pedals far exceeds any interest she had in power measurement. Eventually Garmin will make a Vector version in Speedplay, and we will be back in the stoker power business.
