Amazon.com : SPEEDBOX 2.1 for Giant Ebike. Tuning kit Suitable for All 2017-2021 Giants - Giant Syncdrive Sport/Pro/Life/Core eBikes. Smart Tuning chip of The Second Generation : Sports & Outdoors
SYSTEM - e-Bike Systems | Yamaha Motor Co., Ltd.
Liv SyncDrive E-bike Motor | Liv Cycling Official site