The Big Sur Sport 20" Ebike, featuring a blue frame, orange tires, front and rear suspension, and a mounted luggage rack.

Big Sur Sport 20″ Ebike

7 reviews

$1,999.00

Size – Fit for 5’11’’~6’5’’ Inseam 33’’
Description
Technical Specifications
*Ebike Range: Explained
Icons and text detail specifications for an electric bike: 750W motor power, up to 60 miles range, 28+ mph top speed, thumb throttle, horn and brake light for safety, and USB charging port.
YOUR SAFER ELECTRIC BIKE CHOICE

Fully UL2849 Certified

UL CERTIFICATE
Infographic titled "The Five Big Sur Highlights" featuring a big saddle, big rotor, big headlight, big crankset, and big battery cells for improved bike performance and rider satisfaction.

Geometry and Fit

An e-bike with dimensions and specifications chart shown on the right. Measurements include top tube length, reach, head tube length, stand over height, wheelbase, saddle heights, payload capacity, and weight.
Close-up of a bicycle's rear wheel assembly, showcasing the drivetrain, disc brake, and branding with "AIMA" on the frame. The tire is tan with a textured tread pattern.

Hub Motor and Battery

There’s few places you can’t go with Big Sur Sport, thanks to its powerful 750W (nominal) rear hub motor by Bafang paired with a 48V 15Ah high-capacity battery.

Close-up view of the pedal and chainring of a black bicycle, featuring a visible chain and part of the rear wheel with brown tire accents.

Torque Sensor

Rather than relying on an outdated cadence sensor to detect your movement, our torque sensor is able to instantly feel how hard you’re pedaling at any given time and instruct the motor to match your performance, improving safety and efficiency.
Close-up of bicycle handlebars featuring a digital display, brake levers, and gear shifters.

Full Color Backlit LCD Display

Everything you need is right in front of you at all times, including your current speed, battery remaining, distance traveled, and much more.
Close-up of the front wheel and disc brake of a bicycle with a black rim and tire featuring a tan sidewall.

26” x 4” Fat Tire

20” x 4’’ tires enable you to traverse any terrain with ease while retaining the nimble feeling of a 20″ tire. It’s the best of both worlds!
Close-up of the front section of an electric bike, showing the black frame, orange-rimmed tire, disc brake, and front light. The bike displays the brand name "Big Sur" in yellow.

Suspension Fork

Offering 80mm of travel and adjustable preload & lockout functionality, our suspension fork provides a smooth and comfortable ride feel throughout a wide variety of riding conditions.
Close-up of the rear section of a black bicycle with a cargo rack, tail light, and fender over a tire with a beige sidewall.

Fender & Rear Rack

Fenders come pre-installed to ensure you’ll be able to tackle all sorts of weather conditions. Plus, an included MIK HD rear rack means there’s no limit to what you can take with you.
Close-up of a black electric bicycle with "Big Sur" branding on the frame, featuring a step-through design, front suspension fork, and rear cargo rack.

Flat Position Welding

We’ve applied one of the most advanced aluminum welding processes to our frame, an exclusive “flat position welding” technique. This allows the frame to maintain its strength and rigidity while also appearing smooth and flat.
A digital display shows a speed of 6.5 km/h, trip distance of 65.2 km, battery level at 18%, and power output at 134 watts, with a small icon of a cyclist. The time in the top right corner is 14:36.

Walk Assist

Gone are the days of pushing your bike around by hand. Our walk assist function allows the bike to maintain ~2-3mph (walking speed) as you push it alongside you, up a hill, or anywhere else.
Close-up view of an AIMA electric bicycle’s crankset and motor, highlighting the chain, tires, and frame components.

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.

Video Gallery

Introducing the All New AIMA Big Sur Sport: 20" Tires, Same BIG Power

Think Big Sur power, but bite-sized! Discover the eBike designed for everyone, with all the muscle of the original.

The Best just got...Smaller? | Big Sur Sport | Affordable, Approachable...

This approachable step-through Ebike has all of the top-notch features from the Big Sur, but now comes in a more approachable 20″ tire platform.

AIMA Debuts at CES, Launching a New Global Strategy

In its first appearance at CES, AIMA aligns with the show’s focus on sustainable development and mobility technology.

7 reviews for Big Sur Sport 20″ Ebike

5.0
Based on 7 reviews
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Showing 7 of 7 reviews (5 star). See all 7 reviews

Customer Images

Image #1 from Vincent Dao
Image #1 from Vincent Dao

Vincent Dao

Glad that we paid more! We found these bikes by accident while looking at Aventon Sinch.2. Those are foldable and cheaper which were the big pluses for us. But after riding these Big Sur sport, we both liked these more but the total cost for 2 of these bikes were $600 more. Additionally, we have to get a more robust bike rack. However, it was all worth it. The bikes are beautiful, solid, smooth and powerful. We took them to the beaches, roads and trails. They climbed up the hills with no problem, even when there r loose dirt and rocks. We have had them for like 40 days and have put 200 miles on it. The MK rack is so convenient. We just need to pop the accessories on when we are ready to bike and pop them off when we are about to load them onto the bike rack. The only thing we didn’t like is the headlight which is pretty weak and almost useless haha sorry Aima! No one is perfect! . Hopefully Aima will come out with a better headlight that we can swap out. Otherwise, buy these, you won’t regret it.

(0) (0)
Image #1 from Vincent Dao
1-7 of 7 reviews
  1. J
    Jack
    Reviewer

    TEST RIDE!!! TEST RIDE!!! TEST RIDE!!!!
    I was lucky enough that the dealer near me carried all 3 models the Big Sur, Big Sur Sport, and the Santa Monica and I can honestly say when test riding this after any aventon or velotric or any of the other brands that spends a ton on marketing, the difference is huge! some of the smoothest ride I’ve ever felt! All of the models have a ton of safety features built in from break lights, turn signals, fantastic breaks! The craftmanship is top notch and really is just an all round superior bike! Today I’m a proud owner of a Santa Monica, but honestly, when commuting around the city, the Big Sur Sport would also be perfect too! Think I’ll get that one soon for my girlfriend and we can switch it around!

    (0) (0)
  2. JZ
    J.Z
    Reviewer

    Trying to get our hands on one
    Saw the Big Sur Sport at a rental shop in New Orleans, and the bike looks awesome. The feeatures seem great.
    But, would like to find this bike, or maybe the Santa Monica, at a dealer more local to our home in south Alabama. No one nearby seems to have these bikes in stock. Maybe soon….?

    (0) (0)
  3. VD
    Vincent Dao
    Reviewer

    Glad that we paid more!
    We found these bikes by accident while looking at Aventon Sinch.2. Those are foldable and cheaper which were the big pluses for us. But after riding these Big Sur sport, we both liked these more but the total cost for 2 of these bikes were $600 more. Additionally, we have to get a more robust bike rack. However, it was all worth it. The bikes are beautiful, solid, smooth and powerful. We took them to the beaches, roads and trails. They climbed up the hills with no problem, even when there r loose dirt and rocks. We have had them for like 40 days and have put 200 miles on it. The MK rack is so convenient. We just need to pop the accessories on when we are ready to bike and pop them off when we are about to load them onto the bike rack. The only thing we didn’t like is the headlight which is pretty weak and almost useless haha sorry Aima! No one is perfect! . Hopefully Aima will come out with a better headlight that we can swap out. Otherwise, buy these, you won’t regret it.

    Image #1 from Vincent Dao
    (0) (0)
  4. RM
    RH2 MOTORCYCLES / E BIKES
    Reviewer

    Best bike on the market.
    I absolutely love this bike it is unmatched in comparison to all dealer E-bikes.

    (0) (0)
  5. WE
    William Edelen
    Reviewer

    No regrets
    I have the big surf sport 20 ” in white. It has exceeded my expectations. The bike is loaded with brand-name parts and is UL-approved. Living in a relatively flat area I never shift out of high gear. I use a quick bump of the throttle to get rolling. The white color keeps my battery from heating up in the sun. The build quality of the bike is excellent the frame has no weld marks like most of the others have. Having a torque sensor instead of a cadence sensor that you find on most other bikes, is a game changer. Most of the bikes this size have a post handlebar. Yuck. The handlebars on this are adjustable and swept. Much more comfortable for riding. I did extensive research before purchasing this bike. For the money this bike is by far the best value. I could have ordered online but chose to order through a bike shop. They charged me $200.00 to assemble and deliver the bike. The price is the same online or at the bike shop so give your local bike shop some support. If you ever need service you’ll be glad you did. I have no regrets about buying this bike. I’m 5′ 7″ and 65-plus years old. The addition of a suspension seat post made this bike perfect. If you buy this bike I’m sure you will have no regrets.

    (0) (0)
  6. F
    Frankie
    Reviewer

    Extremely proud owner!
    First and foremost, I want to thank you for creating such an awesome e-bike. I just purchased a Big Sur Sport at High Voltage Ebikes in Largo, FL. I have to say that at first I was on the fence whether I bought a Mok Wheel or the Big Sur. The guys at High Voltage E-bikes allowed me to test ride the Mok wheel first while they were quickly assembling the Big Sur Sport so I could see the difference between them both. When I got in the Big Sur I loved the comfort and ease of riding. By the time I got to the corner of the shop I was already convinced that it was the best and the right fit for me. Excellent bike and an amazing comfort. Great solid construction, great looks. My brother in law has the Big Sur 26. He highly recommended it for me. But I was inclining towards the Mok Wheel, that was until I got in it. Once again thank you for such a great e-bike. I love it!! The best choice out there for e-bikes.

    (0) (0)
  7. C
    Customer
    Reviewer

    Best Ebike in the market
    I purchased the Big Sur Sport ebike for my wife, who can now keep up with me on my traditional mountain bike. To be honest, I find myself taking her bike on adventures when she is not riding. This bike so so versatile; easily takes on most trails near my home, rides perfectly on flat surfaces, and the battery keeps going and going, I have yet to run out of power. The comfortable seat and handlebar placement means no more sore back after long rides. The cushioned forks help to absorb all the bumps and rocks as I ride with complete confidence. I receive fantastic compliments from other ebike owners who remark on the overall look and components of the Big Sur Sport bike. For the money, this is hands-down the best ebike purchase I could have made. The bike is so solid, I know I will enjoy this for years to come. Thank you !!

    (0) (0)
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