bootsie_cat wrote:
I have a buddy who has one. His is two sided with Specialized FACT crank.
In a word- His Sucks!
He rides a fair amount on the trainer so he is well calibrated as to what is 175 watt, 200 watt, etc.. The Specialized 4IIII drifts all over the place. Very occasionally it is accurate, but often not.
Much like a broken clock- Still correct twice per day-
The phone calibrator doesn't help- change the calibration factor and it drifts again.
Measuring strain on carbon crank arms is supposed to be much more difficult and inconsistent, which may explain why these are on a Shimano crank.
Ya I really don't see any decent reason for Specialized to make its own PM. It doesn't seem to offer anything that 5 other companies provide (I.e., a crank-based PM) and I can't imagine that they lose a ton of money selling other PMs. They can probably get a really good OEM deal based on the massive volume of product they move.
Now if they had something different, like bringing the Brim Bros power cleats to market, that would be different. My understanding was that the problem with the Brim pedals was inconsistent flex in the carbon sole of different shoe brands. Now if you make an entire line of shoes across disciplines, you can probably control this better than anyone else. So much more appealing than a fleet of powermeters across my different bike.