06-09-2018, 07:03 PM
(06-09-2018, 04:25 PM)jamincan Wrote: And just to correct something: 250 extra watts is *huge*. 500 extra watts (the legislative limit in Ontario/Canada, afaik) is mind-blowing huge. As a point of comparison, in 2015, Chris Froome could sustain around ~420W or 6W/kg over 20-40 minutes, or the time it would take on a long mountain pass. Based on my current fitness (which is to say, nothing spectacular at all), I could easily beat Froome on something like the Colle delle Finestre with an e-bike that could provide 250W.
500 W is the limit in Ontario, you're right.
I should have added that the 250 W rated power of the BLDC motor in my bike's middrive is the maximum (at 50 Nm, which is quite low in the world of middrives - some of the Bosch ones are up around 70 or 80 Nm) - and that's on the highest assistance level. There are 3 levels, and if I'm riding it I generally have it on ECO (the lowest level) which just cuts the wind and erases the extra weight of the battery. If I hit a big hill I'll put it up to NORMAL or HIGH. As a reminder, as a Class 1 the way this works is a torque sensor in the crank measures how hard the rider is pedaling, and adds a proportional amount of torque via the motor. The result is a really seamless experience - it just really feels like you have a tailwind, that's all. It's transparent.
And, to end my story, I ended up taking my regular bike out for a 40+ km ride today, because I ended up replacing my rear derailleur thanks to your help on the forum! It was quite easy, and I'm glad I learned a few new skills (like using a chain breaker).