Recent content by Ford Prefect

The main issue with using Enviolo or any other hub shifter designs currently available, is that they aren't rated for even the torque I can put on the front pedal by myself, much less rider power plus motor power. The m620 alone exceeds the torque rating of Enviolo & other hub shifters, even...

Perhaps a bit counter-intuitively, rating a motor for less than it can handle, is strongly encouraged by regulations even in the EU. I agree that Bafang probably came up with a 750W nominal rating primarily to fit within US regulations which allow any bikes under 750W to be regulated as a...

I'm also no fan of CANBus. (I don't think anyone who'd like freedom to tweak settings, is?) Without a clearer look at those graphs (on this screen, I literally can't make out the units on a few even when zoomed in?) I shouldn't even speculate, but... My first presumption about the m630 would...

I've always been a bit confused about the listings that give a "750 / 1000 W” rating; I've heard people say that the 1000 is a peak rating (clearly not, with 48V Bafang controllers defaulting to ~30A max), or that some are rated for 48V×21A nominal... But the way the m620 looooves higher...

Personally, I'm running 40t to an 11t-42t, for just over 400% shift range... & I want 48t to an 11t-50t instead, if I can ever afford it. 335% is no slouch, but I'm pretty powerful & the m620 is plenty powerful, so I'd like to get closer to 500! Supposedly the Nine 3x3 has good shift range...

LOL! We are always confident when we haven't been burned. I confess that I am huge, white, & headstrong: More than once I've corrected an officer's behavior & realized later that most people probably wouldn't have tried. Privilege is a tricky thing...

First, sorry for a late reply. I wanted to chime in anyway, because responsive & proportional torque sensing was one of my main concerns in setting up our bike. (Jerky handling would not be well tolerated!) The main issue many people seem to have with their m620 motors, is a total lack of...

52V × 14.7Ah would usually be a 14s4p, not 14s6p. Hopefully it's not a >20Ah battery with only 14.7Ah of max charge left?

It's a bit odd that people think there's more to it, because the law (as cited by ornias) is quite succinct & not difficult to research. It states quite plainly what's required: a setting & appropriate labeling. Directive 2006/42/EC, & EN 15194:2017 Look them up if you don't believe it...

"I am OK with CANbus version of the 620 as the programming tools will become available eventually..." 👻 It's been years already. I wouldn't hold my breath (or stake any money) waiting for the BESST tool to restore configurability that has been taken away. Based on the git readmes, attempts...

If you have any update, I would be interested! GreenBikeKit & Frey.bike both seem to have UART configurable m620 motors in stock, at the moment??? Given the critical need to balance dual battery packs before connecting them, I'm not a strong proponent of paired battery packs... I personally...

Ouch, that's annoyingly small... I believe the Nine from 3x3, uses a 28tooth sprocket by default? I have found miniature 104mm BCD spiders for the m620, but I've yet to find an aftermarket 130mm BCD spider to replace the massive chunk of iron Bafang supplies. Haven't looked for smaller BCDs...

On our m620 powered ebike, I've been riding on the SRAM NX, 11-speed shifter with a 42tooth-to-11tooth cassette & 40tooth front chainring. (All standard issue; 2021 Frey AM1000 v5.) Although I am contending with enormous quantities of extremely sticky & abrasive grime due to deplorable...

Based only on specs & user reports, I believe you'd be quite pleased with the Norco if you got it at a good price. In my experience with the Bafang m620, I think it's the best ebike motor currently available, by several key measures. I don't think the downsides outweigh its benefits, but they...

You all are making me wonder how many miles I'll get out of the Bafang m620! Availability of experienced local service, & parts, was part of what made me OK with buying a Bafang drive. (That, & a lot of research to determine that I could do better than the commonly applied configs!)...