Originally Posted by Alex & Deya

Hermes, you should give the iBike a try on your tandem, we also ride and train with power on our singles, and we've compared the numbers with the power tap and the Gen 3 iBike, the power numbers are almost identical! (the iBike of 2 years ago is not at all as good as the new Gen 3) You'll be surprise how much you can use power on the tandem, as you mentioned one gets good at estimating power based upon perceived effort, so we know how endurance power zone feels on our single and is not different on the tandem, all of our training on the tandem is with power and it really works. We have a combined FTP for the tandem, we got it by doing FTP tests and the numbers came almost identical to our individually FTP numbers (Adding the FTP of the two of us).