A compact 24-pole pedal-assist (PAS) sensor for ebikes with square-taper cranks. It's fully self-contained — smaller and tidier than an exposed magnet-ring sensor — and its 24 poles give almost instant power engagement. Installs left or right.

Specs:

• 24-pole PAS, square-taper, left/right install · HiGo plug
• Standard 90cm cable, or optional 120cm
• Needs ≥5mm of exposed spindle between the BB face and the cranks
• Includes a plastic cable guide for frames with exposed cables under the BB; fits best on steel frames
• Fit check: spindle over 16.5mm may need the adapter hole filed; BB shell over 43mm may sit at an angle