Thanks. It only happened when I stood for most thrust, and i replicated it on the Beltline yesterday. It has never happened when seated and I’m not sure standing makes a difference in initial thrust. Thanks for your reply.
First one broke while standing boost assist while rolling at about 5mph to make a quick short steep climb.
Second one failed in a similar fashion but seated, boost assist starting from a dead stop while trying to haul butt away from a sketchy unlit bike lane that straddled traffic at night.
if you check the enviolo manual. These hubs are rated for a max of 100nm torque and 250w of power. Which on paper should be fine since these Brose motors are rated at 250w/90nm torque. But we know the motors are way underrated in the wattage as they peak 2-3x the 250w number. The 250w is just a sustained number under normal riding conditions.
Even at those numbers if we were to assume a cyclist is putting out 40-50nm of torque in addition to the 90nm the motor produces, we are way above the hubs rated capacity especially if we are in a situation where we are trying to jump the line and drag race off the start. Once you get into heavier riders putting their weight down or strong legged sprinters it’s really a concern of what these hubs can handle. dead stop mid hill climbs are also something that I’m not confident on anymore with these things.
it appears the 2nd gen models went away from the enviolo sportive to heavy duty hubs. But both are rated at the same 160kg/350lb load limit for 100nm motors. So it might just be the same internals rebranded.
enviolo did launch an extreme hub in 2022 which supports 250kg/550lbs for 100nm motors. It might be a future upgrade I go with if I don’t say hell with it and throw the enviolo hub on eBay and build a single speed hub or find a different IGH system all together.
enviolos are such a power drag anyways. I seen one chart where at peak efficiency, they only transfer 85% of output to the road, the rest is lost in friction. But usually are closer to 80% so that would explain why a mosh has a 40% smaller battery but gets identical range figures.
oh well. I shouldn’t rant too much. I got the bike at 60% off. If I actually paid full price I would have room to nit pick more.
