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The Aima Big Sur is a full-size fat tire electric bike built for riders who want a stable, comfortable platform for cruising, commuting, campground use, and mixed-surface riding. Its 26" x 4" tires, 750W rear hub motor, torque sensor, and suspension fork give it a planted feel that works well for pavement, gravel paths, and everyday recreational miles. With throttle on demand and 5 levels of pedal assist, it is a strong fit for riders who want confident power without giving up comfort.
A big part of the Big Sur’s appeal is how it combines fat-tire capability with practical everyday features. It uses a 48V 15Ah removable battery, Shimano 8-speed drivetrain, Tektro hydraulic disc brakes with 203mm rotors, and a rear MIK HD rack for added carrying utility. The Comfort XL saddle, 80mm suspension fork with lockout, and 400-pound weight limit also make it especially appealing for riders who prioritize comfort, stability, and easier all-around usability over a lighter minimalist setup.
For customers shopping this category, the Big Sur makes the most sense for relaxed riders, RV travelers, neighborhood cruisers, and commuters who want a bigger, more substantial e-bike with fat-tire traction and upright comfort. It is a practical option for riders who value smoother ride quality, strong braking, and cargo-ready utility in one package.
Verified Specs
- Motor: 750W, 48V brushless rear hub motor
- Top speed: Up to 20 mph pedal assist, 20 mph throttle
- Battery: Removable internal lithium-ion 48V 15Ah (720Wh) with LG M50LT 21700 cells
- Range: 30 to 60 miles
- Sensor: Torque sensor
- Pedal assist: 5 PAS levels
- Throttle: Throttle on demand
- Charger: 48V 3 Amp fast charger, about 5 hours to full charge
- Frame: 6061 single-butted aluminum alloy frame with internal battery
- Bike weight: 82 lbs. with battery included
- Fork: Suspension fork, 80mm travel, lockout
- Brakes: Tektro hydraulic disc brakes, 203mm rotors
- Drivetrain: Shimano 8-speed
- Cassette: 8-speed, 11-34T
- Crankset: 170mm with 52T chainring
- Tire size: 26" x 4"
- Rear rack: MIK HD
- Weight limit: 400 lbs.
- Display: Color LCD smart display with backlight
