AIMA Big Sur Electric Bike

About This Model

The AIMA Big Sur is built for riders who want the stability, comfort, and confident traction of a full-size fat-tire e-bike. Its 26-inch wheels and 4-inch-wide tires create a planted feel on pavement, gravel, and uneven riding surfaces, while the upright cockpit, wide comfort saddle, and suspension fork help make longer rides more comfortable.

Power comes from a 750W, 48V Bafang rear hub motor paired with a torque sensor. Instead of simply turning the motor on when the pedals move, the torque sensor responds to how firmly you pedal, creating assistance that feels smoother and more connected to your effort. Riders can choose from five pedal-assist levels or use the throttle when they want power without pedaling.

The removable 48V 15Ah, 720Wh battery uses LG M50LT 21700 cells and provides a stated range of 30 to 60 miles, depending on conditions and assist use. AIMA also equips the Big Sur with Tektro hydraulic disc brakes and large 203mm rotors, an 80mm suspension fork with lockout, a Shimano 8-speed drivetrain, puncture-resistant 26 x 4-inch tires, full fenders, and an MIK HD rear rack. AIMA sells its e-bikes through authorized local dealers, so the bike can be professionally assembled, test ridden, and supported after the sale.

Key Features

• 750W, 48V Bafang brushless rear hub motor for strong everyday acceleration and all-terrain fat-tire riding capability.
• Torque sensor pedal assist that responds to the rider's effort for smoother, more natural assistance.
• Removable 48V 15Ah, 720Wh lithium-ion battery using LG M50LT 21700 cells.
• Full-size 26-inch wheels with puncture-resistant 4-inch fat tires for stability and traction on varied surfaces.
• Tektro hydraulic disc brakes with large 203mm rotors for confident stopping control.
• 80mm suspension fork with lockout for added comfort on uneven surfaces.
• Included full fenders and MIK HD rear rack for practical transportation and cargo use.
• AIMA Comfort saddle, ergonomic grips, and upright cockpit designed for relaxed riding.
• Full-color backlit LCD display, five pedal-assist levels, throttle-on-demand, and walk-assist function.
• UL 2849 certified complete e-bike electrical system.

Specifications

• Top Speed: Up to 20 MPH with pedal assist and up to 20 MPH using the throttle
• E-Bike Class: Class 2
• Range: 30 to 60 miles, depending on rider weight, terrain, weather, tire pressure, speed, and assist level
• Motor: 750W, 48V Bafang brushless rear hub motor
• Battery: Removable internal 48V, 15Ah, 720Wh lithium-ion battery using LG M50LT 21700 cells
• Charger: 48V, 3A fast charger; approximately 5 hours for a full charge
• Sensor: Torque sensor
• Pedal Assist: 5 pedal-assist levels
• Throttle: Throttle on demand
• Display: Full-color, backlit LCD display
• Brakes: Tektro hydraulic disc brakes with 203mm rotors
• Drivetrain: Shimano 8-speed shifter with 11-34T cassette and 52T chainring
• Suspension: Suspension fork with 80mm travel and lockout
• Tires: Puncture-resistant 26 x 4-inch fat tires on double-wall aluminum alloy rims
• Frame: 6061 single-butted aluminum alloy frame with internal removable battery
• Weight: 82 lbs with battery
• Weight Limit: 400 lbs
• Rear Rack: Included MIK HD rear rack
• Fenders: Included and pre-installed
• Saddle: AIMA Comfort 280mm x 270mm saddle
• Walk Assist: Approximately 2 to 3 MPH
• Colors: Matte Black and Ivory White
• Safety Certification: UL 2849 certified
• Warranty: 2-year manufacturer's warranty

Need more time to purchase your e-bike? Ask us about our Interest-Free Layaway and Advance Purchase Credit programs.