Zwiftpower Time not Equal to Zwift Time

My time in Zwiftpower in last nights Herd Summer Racing event was 4 minutes longer than my time in Zwift. What is up with that? I assume everyone was 4 minutes longer but…

I believe your ZP race time includes the 5 minute delay before your C group took off after the D group start. (B cat + 10 mins and A cat + 15 mins)

Plus a little extra difference between Zwift timing and ZP timing. (Which I thought had been corrected a few months ago)

makes sense, thanks

i could believe that not every zp route entry is exactly 1:1 accurate with zwift, especially if it’s an old route. no idea though