Big Sur Matte Black

$1,799.00 $1,999.00

*Take a test ride at your local dealer


Big Sur is a 26” x 4” fat tire e-bike with 750W powerful Bafang motor designed for all terrains. As a class2/3 e-bike, its speed can go up to 20mph on throttle mode and 28 mph on PAS mode. And specially-designed big headlight and big rotor along with LG 21700 big battery cells make Big Sur one of the safest e-bikes. Besides, equipped with 52T big crankset and AIMA Comfort big saddle, Big Sur provides riders with remarkably comfortable and smooth riding experience. 

Technical Specifications


Big Sur


750W (Rated), 48V Brushless Rear Hub Motor


Throttle on demand


LCD Smart Easy Read Display with Backlight, Colorful screen


Up to 28 MPH on the Pedal Assist


Removable Internal Lithium-ion 48V, 15Ah (720Wh) with LG cells


Torque Sensor


5 Levels


48V 3 Amp Fast Charger, about 5 Hours Charging


Up to 60 Miles


6061 Single-Butted Aluminum Alloy Frame with Internal Battery


82 lbs. ( Battery included)


9/16' Alloy Platform


Suspension Fork with 80mm travel, with lockout


400 lbs.


Included, Aluminum Alloy Kickstand 


170mm w/ 52 T


Shimano 8 Speed


Hydraulic Disc Brakes


203 mm


130 Link, 8 Speed


Double Wall Aluminum Alloy


Black Stainless 12G Front / 12G Rear


Butyl Rubber


Front Aluminum Alloy Disc Hub 


26" x 4" Puncture Resistant


AIMA Comfort, 280mm*270mm saddle


Aluminum Alloy, 30.4mm 2-Bolt Clamp


Threadless, 31.8mm, 7 Degree Rise, Ext 75mm


34.9 mm Quick Release


Aluminum Alloy Double Wall, 31.8mm, 680mm


Sealed Bearing Headset


Ergonomic Comfort

Your Safer electric bike choice

Fully UL2849 Certified

Geometry and Fit

Geometry and Fit


Hub Motor and Battery

The powerful 750W rear hub motor with a 48V15Ah high-capacity integrated battery will take you to those far-to-reach places and discover more of what’s out there.

Torque Sensor

The torque sensor is the next-generation transmission technology that recognizes your pedaling effort, meets you where you’re at, and amplifies your output, conserving battery life and extending riding range.

Full Color Backlit LCD Display

The Full Color Display gives all the important metrics you need, including speed, distance traveled, pedal assist level, and more.

26” x 4” Fat Tire

26” x 4’’ means wherever there’s adventure, our Big Sur will find it

Suspension Fork

A suspension fork with up to 80mm of travel means there’s plenty of room for comfort off the beaten path.

Fender & Rear Rack

Pre-installed fenders will keep you protected on those rugged routes, in any weather, while an included rear rack means you can carry all that you need wherever the road takes you.

Flat Position Welding

The most advanced aluminum frame exclusive welding process is applied to do flat position welding on the whole bike frame, so that the surface of the frame is not only strong and durable, but also smooth and flat.

Walk Assist

The built-in walk assist function makes it possible to obtain electric power assist even when propelling the e-bike on foot. It further improves the comfort of e-bike in various usage scenarios.

Controller Compartment

The specially designed controller compartment makes the wiring of the electronic control system in the e-bike body more systematic, and at the same time enhances the heat dissipation, ensuring a safer riding on the next level.

Video Gallery

Video Gallery

Assembly Guide

Our dealers follow this official assembly guide to make sure your bike is ready to ride.

Big Sur vs. Aventon

How does our bike stack up against the competition? Check out our head-to-head comparison.

Ride Review

Big Sur looks great in person, and even better in motion. See where it can take you!

Customer Reviews

Based on 34 reviews
Don't believe all the 5 star reviews

I have had multiple issues with my big sur ebike. A slipping derailure (easily fixed), a broken lock on the battery door, but the most disappointing item is the 35 mile range on the battery, dispite riding with motor assist on 1 and prudent use of the throttle. No hills here either. I am not happy. I have been back to the dealer four times. They are very accommodating but too much inconvenience. Range isn't close to its advertised estimate.

David S.
Great bike! Safe, stylish, powerful!

Got this bike from a local dealer brand new. He had me try several other styles of e-bikes, but this one I loved the most. The price is well matched with the quality and comfort of the ride. It's sturdy, quick, stylish too. Even better it is CERTIFIED! Which means you sleep a bit easier without worrying if the battery will do unexpected "things". If you are looking for all these things which are most importantly, safety, then Amia is at a really good start and I wouldn't look past them. My very first ride in traffic today, I had people asking me at stoplights about my Big Sur. I can see this company really doing great things in the future with how well this product is engineered. Keep up with the great work, Amia!

(FYI, I would print the UL certification in the manual. I flipped countless times through it last night and didn't find it until just now on the website. Pretty important, especially with something using an impressive power source.)

Thank you for the awesome review, Dave! We're thrilled that you're enjoying your Big Sur. We're also glad to know that the UL certification brings you peace of mind. Safety is a top priority for us, and we appreciate your feedback about including the certification in the manual. We'll certainly consider your suggestion for future improvements. Happy riding!

New Big Sur!

Bought as a commuter bike to work. I live in the foothills and it does great going up hills. Very comfortable and easy to ride. Absolutely love it. Makes going to work fun again.

Matthew Hadan
Test ride of Big Sur

Awesome bike with so much power and easy to control. I loved my test ride.

Big Sur E Bike

This bike is super easy to ride, I barely use the throttle. It made going on grass and dirt a breeze, and was super fast if you need it to be. Great ride !

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