Big Sur Electric Bikes Collection: Fat-Tire Power, Refined
The AIMA Big Sur collection is where the brand’s fat-tire legacy began, and it remains the lineup’s flagship family. The Big Sur is built around a simple formula: a powerful Bafang rear hub motor, a high-capacity battery, and wide 26” x 4” fat tires that turn rough pavement, gravel, and dirt into manageable terrain. It is a bike designed for riders who want capability without compromise—stable at speed, comfortable over distance, and confident when the surface gets loose.
The current Big Sur 2.0 represents a significant step forward from the first generation. It pairs a 750W Bafang motor with 85Nm of torque and a 48V 20Ah (960Wh) battery, delivering up to 75 miles of range on a single charge—a meaningful upgrade over the original’s 15Ah pack . The pedal sensor now combines torque and cadence modes, so you can choose between natural, effort-matched assistance or a more relaxed ride. Stopping power comes from Tektro hydraulic disc brakes with 203mm rotors, and the bike is UL 2849 certified for electrical safety . The Bafang TFT display adds smart features including FindMy tracking, navigation, and call notifications .
The collection also includes the Big Sur Sport, a more compact variant running on 20” x 4” tires for quicker handling and easier storage, while sharing the same motor and battery platform . Whether you choose the full-size Big Sur or the nimble Sport, every model in this family reflects AIMA’s commitment to precision engineering and the mission of keeping the world cycling, smiling, and syncing with the energy of adventure. Explore the collection to compare models, or contact your local dealer for availability and pricing.
