Its about 38 mins on my XTC and 26 Mins on the Ebb. I don't think its possible to do it in 19 mins in Eco. Do it in tour+ or emtb for sure but then you lose even more HR.
I ride both and this is correct. Same loop with my EMTB in eco vs my XTC hardtail 14km loop with 350m of climbing my HR is around 22 bpm lower on average on the Ebb. Don't ask me to ride it with the motor off, I'm not an idiot.
Just to update this, 2,650km's (1646 miles) now and still running and changing faultlessly. I'll measure it this long weekend and probably get that SLX 12 spd chain on
I should have mentioned I was more meaning brands that are only on Shimano motors.
YT, Kona (lol), Marin, Yeti, Scor & Propain off the top of my head..