So the other posts about this are a few years old, and I wanted to clarify in case they'd changed (and I still can't wrap my head around them).
I was always under the impression, that the fastest 40km PR was based on the first 40km of any ride. I rode last weekend, the first 10-15km were flat and I reckon I averaged about 40km/h, but then the ride went uphill. The climbing continued, until about km #40, then was more or less downhill for the next 45km, at well over 40km/h. My new record after the ride was a ~56ish minute 40km record.
So can someone clarify whether it's the first 40km of a ride, or just any 40km of a ride that it uses to calculate the record?
Cheers
James