The Big Sur U is a utility cargo eBike designed for carrying passengers, groceries, gear, and everyday cargo.With its extended rear rack, high payload capacity, and compact wheel design, the Big Sur U is ideal for:
- Family transportation
- School drop-offs and pickups
- Grocery runs
- Commuting
- RV and campground use
- Small business and delivery applications
- Recreational riding with passengers
The Big Sur U is designed around utility and passenger-carrying capability.Key features include:
- Extended rear cargo rack
- Passenger seating capability
- Rear foot pegs
- Rear wheel safety guards
- High overall payload capacity
- Compact and stable 20" wheel platform
- Utility-focused frame design
Unlike the Big Sur and Big Sur Sport series, the Big Sur U is specifically built to carry cargo and passengers comfortably.
Yes.
The Big Sur U is designed to accommodate a second rider when equipped with the factory passenger package.The passenger package includes:
- Rear passenger cushion
- Rear foot pegs
- Rear wheel protection guards
Always follow the maximum payload capacity guidelines and local regulations regarding passenger transportation.
The Big Sur U is designed to support a total payload capacity of up to 400 lbs (181 kg), including the rider, passenger, cargo, and accessories.
Please ensure cargo is properly secured and evenly distributed.
The Big Sur U's rear cargo rack is designed to support up to 120 lbs (54 kg).
Always ensure cargo or passenger accessories are properly secured before riding.
The Big Sur U is designed for:
- Urban commuting
- Family transportation
- Neighborhood riding
- Grocery runs
- Recreational riding
- Bike paths and paved trails
- Light gravel roads
Its compact geometry and utility-focused design make it easy to handle even when carrying additional cargo.
The Big Sur U is equipped with a 750W BAFANG rear hub motor designed to provide strong acceleration, reliable hill-climbing performance, and confident riding even when carrying cargo or passengers.
The Big Sur U features a removable 48V 15Ah (720Wh) lithium-ion battery.
The battery can be charged while installed on the bicycle or removed for convenient indoor charging.
Actual riding range depends on rider weight, cargo load, terrain, assist level, throttle usage, weather conditions, and tire pressure.
Under typical riding conditions, riders can expect up to 60 miles of range on a full charge.
Carrying additional cargo or passengers may reduce overall range.
Yes.
The battery is removable and lockable for convenient charging, transportation, and storage.
Always use the supplied charger or an approved replacement charger.
Under normal conditions, the battery typically requires approximately 5–8 hours to fully charge.
Charging time may vary depending on battery condition and ambient temperature.
Yes.
The Big Sur U is equipped with a torque sensor and allows riders to select between Torque Mode and Cadence Mode riding experiences.
Torque Mode provides motor assistance based on rider pedal effort for a more natural feel, while Cadence Mode delivers a more relaxed riding experience with consistent assistance.
This flexibility allows riders to choose the riding style that best suits their preferences and riding conditions.
- Navigation
- Apple Find My setup
- Call notifications
- Text notifications
- Ride records
- Battery information
Yes.
The Big Sur U offers additional smart features through both the display and the BAFANG Go App.Available features may include:
- Assist level settings
- Ride data tracking
- Navigation features
- Battery monitoring
- Display customization
- System settings
- Apple Find My integration
Available functions may vary depending on software version, mobile device compatibility, and local regulations.
The Big Sur U is delivered as a Class 2 eBike with a top assisted speed of 20 MPH.
Please contact your authorized AIMA dealer regarding local regulations and model-specific speed settings.
The 20-inch wheel platform provides several benefits for utility riding:
- Lower center of gravity
- Improved stability when carrying cargo
- Easier passenger loading
- Easier mounting and dismounting
- Improved low-speed handling
- Greater rider confidence when fully loaded
These characteristics make the Big Sur U particularly well suited for cargo and passenger transportation.
Yes.The Big Sur U comes equipped with:
- Front headlight
- Rear tail light
- Brake light
- Turn signals
- Horn
These features help improve visibility and communication with other road users.
The Big Sur U is equipped with TEKTRO hydraulic disc brakes and 203 mm brake rotors designed to provide strong and consistent braking performance, especially when carrying cargo or passengers.
Your first point of contact should always be your authorized AIMA dealer.
Authorized dealers are trained to diagnose and resolve most service and warranty concerns and can work directly with AIMA when additional support is required.
If you are unable to contact your dealer, please contact AIMA Customer Support:info@aimausa.com
The Big Sur U is backed by AIMA's 2-Year Limited Warranty covering defects in materials and workmanship under normal use and maintenance.
Warranty claims should be initiated through an authorized AIMA dealer.
AIMA provides warranty support through its dealer network, while certain service procedures, labor charges, and dealer-specific service programs may vary by dealer.Please contact your authorized dealer for warranty-related assistance and coverage details.

















