Longwise, I had 1.6kg of lipo onboard. 5ah of hk 4s bricks. It always managed the 7.5 miles of track path and highway it was sized for. Typically in 22 minutes. Often still one third full. At 13s, I don't know yet.
I like the s12s D8veh posted, and I think the s12sh is 35Amps. Same hi-tech display, with definitely more than 3 power levels. The s12s is what I use with the cst now, at 13s. At 12s I used a 3 speed led display. They target one of 3 speeds. Using full power to get there(turning the power down gradually as you approach target speed). At 12s it gave me 12mph, 18mph(which was nice) or unlimited(24) in a 26" wheel. The new controller can do the same, and target different speeds. However full power at every launch, is useless in some conditions. The new one can instead forget speed and instead, give different power levels. I think it's 5 levels, 20% 40% 60% ... And just 20% is enough to take the weight out of cycling. You reach around 18-20mph without trying.
Thanks for the stator info lads. I feel much better educated now. We don't really see gearbox failures with either do we? Though I believe the bpm has the better box. Led by the mac advert claiming wider gears than two other named manufacturers, but not Bafang.
I think the cst came after the bpm and was better made. Then came the bpm2 which brought it up to the same standard. D8veh knows.
I'm happy with my cst and don't believe it needs more than the 23 Amps available to it. They take 30 though. The mac is more robust but weighs about the same. It doesn't look like it comes with a plug, but could it offer battery savings, through a gain in efficiency over the Bafangs. It's a more costly motor, but maybe it pays.
