- If you’re going to train with TR and use it’s protocols, it would make sense to stick with its algorithms too.
In any case it’s just a number, repeatability and consistency is the key. I use pedal meters so I can use the same equipment inside and out for consistent power measurement.
If you can establish (over several rides) a consistent difference between your power meter readings from different kit, then you can include that in calculations for your race day power readings. I wouldnt think of it as different FTPs.