- Yeah, PowerMatch for clean and consistent data inside and outside.
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Even if you choose to use PowerMatch and your PM as the guide, I still recommend a new FTP test. The feel and ride of the new trainer will most likely differ enough from your current trainer that you could experience a different test result.
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Things like trainer mode (Resistance vs ERG), gearing (High / Medium / Low), flywheel inertia (likely not the same as your current trainer) can all play into giving you slightly (or even largely?) different results when compared to your current trainer setup.