SEG Automotive has introduced a new mid-drive motor that takes aim at one of the e-bike industry’s long-standing trade-offs: the gap between lightweight assist systems and full-power drives. The new BLM weighs just 2.1 kg, according to the manufacturer, yet delivers up to 80 Nm of torque, 700 W of peak power and 400 percent assistance in its 48-volt configuration.
To put those figures in context, the fourth-generation Bosch Performance Line CX launched at 75 Nm while weighing around 2.9 kg, and the lightweight Bosch Performance Line SX offers roughly 55 Nm at a similar two-kilogram weight. The BLM, on paper, matches the torque of yesterday’s full-power benchmarks at light-assist weight. Within SEG’s own portfolio, it delivers 15 Nm more torque and 200 W more peak power than the existing BHZ unit at the same weight.
The motor will be offered in 36- and 48-volt versions, with the top performance figures reserved for the 48-volt variant. The first production application is BH’s new iRS1 e-road bike, whose flagship carbon build comes in at a claimed 12.9 kg with a 630 Wh internal battery, expandable to 810 Wh via a range extender.
Spec sheets never tell the full story, however. How the BLM sustains power under prolonged load, how it manages heat, and what the complete system — battery, display and controls included — weighs against established competitors remains to be seen. Still, if the numbers hold up on the road, SEG has moved a boundary that matters for lightweight SUV e-bikes and commuters alike.
Source: wattmoves.de