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48V. The firmware numbering has no logic to the running series. The 20.8 is a 15A rated firmware unlike the others

M600

I tried 14.6 before, weak PAS 1 to PAS 3, although the ramp up was linear. Im using 20.8 and the ramp up at Pas1&2 is still a bit frisky. PAS 2 is a tad too strong

ohh..meaning this fw is only compatible with the new bootloader.

How is the ramp up at Pas 1 & 2? Strong?

Yes on a non technical steep hill it is great, but if you are riding rooted, rutted and technical steep short singletrack rails, its very annoying. Its a compromise on long steep hills, i switch to 5 PAS levels rather 9 PAS levels. This helps on the long steep hills although the ramp up on PAS...

Correct. The main thing is it doesn't have the aggressive ramp up which throws you off when riding technical trails.

20.8 if your ride is 100% offroad.

i have 190mm on my E10 and running mullet. Rear with offset bushing and 216*63 shock. I believe 180 will give a better geometry although there is nothing wrong with 190mm setup

it's on the M600 github for firmware https://github.com/OpenSourceEBike/Bafang_M500_M600/tree/main/Firmwares/Official/Motor/m600

As I have said, I only use the bike for technical rides..which means staying at either Pas 1 or 2. Anything beyond is unrideable. As for low battery attenuation, I haven't taken it that far before as range is not important to me. I only ride a max 20-25km per ride. Perhaps you can try it out...

oh my word ..this 20.8 fw is a GEM. This is what I have been waiting for after trying all the fw from 46.7, 46.8 and 14.6. The power distribution is similar to 46.8 drawing about 4A at PAS1/9. No brutal ramp up of 10A as detected in 46.8. It has a slight ramp, I believe about 5-6A just...

How is this compared to 14.6?

Use 14.6..its very smooth and half the power or 46.7

just the part connecting to the shock

then the shock yoke shd be greased and also the expansion bolt of the headset. other areas I just left it alone. too much grease will attract dirt.

Looks like the 14.6 is really suited for technical terrains. Only issue is whether the ramp up will reach 10A (which means brutal) and the battery range.

someone posted this in Facebook, the OEM 170mm cranks.

the OEM is around 560gms and the 165mm is ard 432gms. I am not sure how you arrived to 300gms lighter.

the 46.7 is just too brutal in the ramp up and too much torque for PAS1/2. I have to pull the brakes everytime I press the pedal in between stop and start. Very annoying when riding in technical trails.