Thank you very much for the interesting report,
@PaD! Whatever the grade is there, the short incline should pose no problem, I guess. Problems with steep ascents begin when the incline is long (the indication of that is the bike going slower and slower...) My 1.2s motor has the same max torque (90 Nm) as your 1.3, Peranders. Yours is stronger (550 vs 520 W) and the amplification factor of the 1.3 is 3.6x while the 1.2s can help you with "3.2 times you!" No doubt the 1.3 has the edge, same as the 40T chainring of your Vado against 48T of mine. The S-Pedelec makes it easy to get at high speed while the "normal" EU Vado 5.0 has the climbing edge. Which is a good thing in Stockholm
Would like to try it myself!
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I wouldn't wish anybody to make this ascent (although people make it on traditional bikes, very slowly). The majority of inclines is above 8% and that's over 12 km. Very tiresome. We were lucky to be descending there; a lot of fun! People rent "scooters for grown-ups" to be able to get their adrenaline shot there
A couple of words about torque: My brother was often getting a "wheelie" when he rode my Vado for his work commutes. Since he was putting a lot of torque into the crank at the green light change (Turbo Mode), the Vado motor was responding with the full 520 W support instantly!
Yet what you can expect from a powerful e-MTB is beyond imagination. SyncDrive motors (especially the Yamaha PW-X2) feature the "Zero Cadence", that is, the motor starts instantly with the foot push on the pedal. Combined with low gearing it may bring unexpected outcome. The first time Jacek got onto the Trance E+, he was thrown out from the saddle as he didn't expect the instant response of the bike! (I guess same could happen to Simon Cowell, you've heard the story for sure).