Conquer Every Ride
with Big Sur
Experience unmatched power, comfort, and style — wherever the road takes you.
Conquer Every Ride with Big Sur
Experience unmatched power, comfort, and style — wherever the road takes you.
Big Sur Ebike
Big Sur is a 26 x 4” fat tire all-terrain e-bike, equipped with a powerful 750W Bafang rear hub motor. A specially-designed big headlight, extra-large 203mm brake rotors, LG 21700 battery cells, and a full UL2849 certification make Big Sur one of the safest e-bikes on the market. Sporting a bigger 52T crankset for stability at speed and a custom AIMA Comfort XL seat, Big Sur provides riders with a remarkably comfortable and smooth riding experience.
| MODEL | Big Sur |
|---|---|
| MOTOR | 750W, 48V Brushless Rear Hub Motor |
| THROTTLE | Throttle on Demand |
| DISPLAY | Color LCD, Smart Easy-to-Read Display with Backlight |
| SPEED | Up to 20 MPH Pedal Assist, 20 MPH Throttle |
| BATTERY | Removable Internal Lithium-ion 48V, 15Ah (720Wh) with LG M50LT 21700 cells |
| REAR RACK | MIK HD |
| SENSOR | Torque Sensor |
| PEDAL ASSIST | 5 PAS Levels |
| CHARGER | 48V 3 Amp Fast Charger, about 5 Hours to a Full Charge |
| RANGE | 30 to 60 Miles |
| FRAME | 6061 Single-Butted Aluminum Alloy Frame with Internal Battery |
| WEIGHT | 82 lbs. (Battery included) |
| PEDALS | 9/16" Alloy Platform |
| FORK | Suspension Fork, 80mm travel, lockout |
| WEIGHT LIMIT | 400 lbs. |
| KICKSTAND | Aluminum Alloy Kickstand |
| CRANKSET | 170mm w/ 52T Chainring |
| SHIFTER | Shimano 8 Speed |
| CASSETTE | 8 Speed, 11-34T |
| BRAKES | Tektro Hydraulic Disc Brakes, 203 mm Rotors |
| CHAIN | 130 Link, 8 Speed |
| RIM | Double Wall Aluminum Alloy |
| SPOKES | Black Stainless 12G Front / 12G Rear |
| TUBES | Butyl Rubber |
| HUBS | Front Aluminum Alloy Disc Hub |
| TIRES | 26" x 4" |
| SADDLE | AIMA Comfort, 280mm*270mm Saddle |
| SEATPOST | Aluminum Alloy, 30.4mm 2-Bolt Clamp |
| STEM | Threadless, 31.8mm, 7° Rise, 75mm Length |
| SEAT CLAMP | 34.9mm Quick Release |
| HANDLEBARS | Aluminum Alloy Double Wall, 31.8mm, 680mm |
| HEADSET | Sealed Bearing Headset |
| GRIPS | Ergonomic Comfort |
An ebike's battery life is influenced by several factors that can affect its maximum range. While our ebikes can achieve up to 60 miles of range under ideal riding conditions, range can vary from 20 - 60 miles based on many contributing factors.
Here's a list of the most common factors that affect range, as well as what you can do to maximize your riding time.
- Pedal Assist: Higher levels of pedal assist will allow for an easier ride, but will also draw more power from the battery. Lower pedal assist levels are better for getting as many miles as possible out of your battery.
- Average Cruising Speed: Riding slower will decrease the amount of energy you lose to wind resistance as the bike pushes you forward. Slower speeds will extend battery life.
- Tire Pressure: Keeping your tires inflated to the recommended pressure can help increase your range. Maintaining a proper tire pressure not only increases your range, but also helps prevent pinch flats! For most riding situations, checking your tire pressure at least once a week will keep your ride safe and energy-efficient.
- Load Weight: Carrying a heavier load can decrease your range. This includes the total load of both the weight of the rider and any cargo you may be carrying. More weight takes more time and energy to get up to speed, negatively affecting your range. It's best to keep loads light whenever possible if you're looking to extend your range.
- Terrain & Elevation: In general, riding over smooth and flat terrain will give you a longer range. Hills and rough terrain can greatly impact your maximum range, especially on higher assist levels.
- Wind: That's right! The wind can affect your battery range too! Riding into a headwind will decrease your range, but if you're able to catch a tailwind, you'll actually see that you'll gain more range! Be mindful of which way the wind is blowing when you are riding. If you've been riding in a tailwind, turning around will take more energy from the battery to get you home.
- Ambient Temperature: Riding in cold weather will impact the battery's ability to function optimally. A good rule of thumb is, if you're comfortable, then the battery is comfortable too. This also goes for storing the battery too!
All AIMA products are sold exclusively through Authorized AIMA Dealers and are not available for purchase online.
We do this because we want to support each and every community by offering our dealers unwavering support. The local bike shop is the center of each cycling community and we want to help preserve that by selling our products exclusively through our dealers.
Every Authorized AIMA Dealer offers free test rides for all models they have available. They each provide a personalized shopping experience to ensure that you are purchasing the correct size and model for your needs. This also guarantees that your bike is assembled correctly by a professional bicycle mechanic prior to your first ride!
AIMA has over 500 shops across the US and is rapidly expanding!
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Hub Motor and Battery
Powered by a 48V 15Ah battery using LG high-capacity cells, Big Sur's 750W Bafang rear hub motor has the juice to take you just about anywhere.
Torque Sensor
One of the latest e-bike innovations, a torque sensor sees how hard you pedal in real time and matches your input power using the motor. This leads to a safer and more intuitive ride, as well as conserving battery life.
Full Color Backlit LCD Display
View essential stats at any time with a bright and daylight-ready full color screen. Choose between several different themes to see your speed, battery life, pedal assist level, and much more.
26” x 4” Fat Tire
Big Sur's puncture-resistant 26" x 4" tires can handle almost any terrain, giving you the confidence you need to push your own riding limits off-road.
Suspension Fork
With up to 80mm of travel and adjustable preload and lockout settings, our suspension fork eats up everything in your path, assisted by Big Sur's 4" wide tires.
Fender & Rear Rack
An MIK HD rear rack comes standard, allowing for endless customization possibilities. Plus, fenders come pre-installed to ensure you're protected from below while riding in any weather conditions.
Flat Position Welding
We've taken great care and utilized some of the newest aluminum welding techniques available on our frame, which comes with a lifetime warranty. These techniques allow the frame to maintain its structural rigidity while also appearing flat and smooth.
Walk Assist
Walk your bike alongside you, up a hill, or anywhere you need to with Walk Assist, which allows the bike to maintain a constant ~2-3mph based on your walking speed.
Controller Compartment
Big Sur's controller is mounted right near the pedals, allowing for easy access during repairs and maintenance. Plus, this mounting style allows the controller to utilize the entire frame as a heat sink, greatly improving safety and performance under load.
Hub Motor and Battery
Powered by a 48V 15Ah battery using LG high-capacity cells, Big Sur's 750W Bafang rear hub motor has the juice to take you just about anywhere.
Torque Sensor
One of the latest e-bike innovations, a torque sensor sees how hard you pedal in real time and matches your input power using the motor. This leads to a safer and more intuitive ride, as well as conserving battery life.
Full Color Backlit LCD Display
View essential stats at any time with a bright and daylight-ready full color screen. Choose between several different themes to see your speed, battery life, pedal assist level, and much more.
26” x 4” Fat Tire
Big Sur's puncture-resistant 26" x 4" tires can handle almost any terrain, giving you the confidence you need to push your own riding limits off-road.
Suspension Fork
With up to 80mm of travel and adjustable preload and lockout settings, our suspension fork eats up everything in your path, assisted by Big Sur's 4" wide tires.
Fender & Rear Rack
An MIK HD rear rack comes standard, allowing for endless customization possibilities. Plus, fenders come pre-installed to ensure you're protected from below while riding in any weather conditions.
Flat Position Welding
We've taken great care and utilized some of the newest aluminum welding techniques available on our frame, which comes with a lifetime warranty. These techniques allow the frame to maintain its structural rigidity while also appearing flat and smooth.
Walk Assist
Walk your bike alongside you, up a hill, or anywhere you need to with Walk Assist, which allows the bike to maintain a constant ~2-3mph based on your walking speed.
Controller Compartment
Big Sur's controller is mounted right near the pedals, allowing for easy access during repairs and maintenance. Plus, this mounting style allows the controller to utilize the entire frame as a heat sink, greatly improving safety and performance under load.
Big Sur Geometry
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