RANGE
Up To 60 Miles*
BAFANG MOTOR
750W
SENSOR
Torque / Cadence
LG BATTERY
48 V 15Ah
UL2849 Certification
2 Years Warranty
500+ Dealer Shops

Big Sur U Cargo Ebike

The Spirit of Big Sur. Shared Together.
Regular price
$1,999
Sale price
$1,999
Regular price
Color Cosmic Purple
Size
Test Ride at Nearby Shop
To ensure the best riding experience, we recommend booking an in-store test ride at our authorized dealer shops near you, where you can enjoy reliable and professional service and support.
RANGE
Up To 60 Miles*
BAFANG MOTOR
750W
SENSOR
Torque / Cadence
LG BATTERY
48 V 15Ah
UL2849 Certification
WARRANTY
2 Years Warranty
500+ Dealer Shops
Big Sur U Cargo Ebike

The Spirit of Big Sur. Shared Together

Built for family adventures and everyday utility.

Carry More Carry More
Ride In Comfort Ride In Comfort
Big Sur U Bike

Big Sur U Geometry

Size

One Size

Top Tube 24.80"(630mm)
Reach 18.31"(465mm)
Head Tube Length 6.30"(160mm)
Standover 17.01"(432mm)
Wheelbase 47.17"(1198mm)
Overall Length 70.87"(1800mm)
Min Saddle Height 30.94"(786mm)
Max Saddle Height 38.03"(966mm)
Recommended Height 5'0" - 6'3"

Share The Journey

  • Ride Together.
  • Grow Together.
  • Explore Together.
School Drop-Off
School Drop-Off
Neighborhood Rides Together
Neighborhood Rides Together
Grocery Runs
Grocery Runs
Carry More With Less Effort
Carry More With Less Effort
Family Park Days
Family Park Days

Made For Everyday Family Joy

Carry more. Ride together. Enjoy every moment.

BAFANG E-System
BAFANG E-System

Reliable power. Smarter riding.

Stay Connected
Stay Connected

Navigation, Apple Find My, and more in one display.

Go Up To 60 Miles
Go Up To 60 Miles

48V 15Ah removable battery for longer range.

Specifications

Motor
Rear Hub Motor, BAFANG, 750W
Throttle
Throttle on Demand
Pedal Sensor
Torque / Cadence
Pedal Assist
5 PAS Levels
Speed
20 MPH
Display
C010 BAFANG E-system TFT Display (Find My, Sensor Selection Function)
Certification
UL2849
Shifter
Shimano 7 Speed
Rear Derailleur
Shimano 7 Speed
Cassette
7 Speed, 11-28T
Chain
7 Speed
Crankset
52T Chainring
Motor & Drivetrain
Battery
48 V 15Ah
Cells
LG
Chargeing Time
About 5 H to a Full Charge
Range
Up To 60 Miles*
Lighting
Front Light/Rear Light/ Rear Turn Lights
Horn
Yes
Battery & Electrical
Frame
6061 Single-Butted Aluminum Alloy Frame
Fork
"ZOOM "Suspension Fork, with Lockout
Dimensions (L×W×H)
1800*720*1140 mm
Weight
80.3 lbs 36.4 kg
Payload Capacity
400 lbs 181 kg
Kickstand
Aluminum Alloy Kickstand
Pedals
PP
FRAME & SUSPENSION
detail
Brake
Tektro Hydraulic Disc 203 mm Brakes
Tires
20''*3.5
Rims
Double Wall Aluminum Alloy
Spokes
Black Stainless
Tubes
Butyl Rubber
Front Hub
Aluminum Alloy Disc
BRAKES & WHEELS
detail
Saddle
AIMA Enlarged Comfort Saddle
Seatpost
Aluminium Alloy 30.9mm
Seat Clamp
34.9mm Quick Release
Stem
Threadless
Handlebars
Aluminium Alloy 720mm
Grips
Ergonomic Comfort
Headset
Sealed Bearing Headset
Cockpit
detail

Bring Everyone Along

Visit your local AIMA dealer and discover a smarter way to ride together.

Rider reviews

E-Bicycle Built For Two
E-Bicycle Built For Two

The AIMA Big Sur U wasn’t what Harry Dacre pictured when he sang about Daisy Bell looking sweet upon a bicycle built for two, but I can assure you this bike is far more fun than anything he imagined. AIMA designed the Big Sur U as a true two-person mover; a utility bike that comes fully outfitted with a passenger setup so you can comfortably bring a plus-one.

Read More

Frequently Asked Questions

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.