Big Sur Sport Ebike

$1,699.00 $1,999.00
Everything you love about the original Big Sur is back! Now sporting 20" x 4" fat tires, Big Sur Sport is smaller and lighter, but it's just as fun and performant as Big Sur 26", if not more so! This bike retains the original's class 2/3 rating (20mph and 28mph top speed using the throttle and PAS respectively), as well as its safety features, including big 203mm brake rotors, LG 21700 battery cells, and a full UL2849 certification. Equipped standard with the AIMA Comfort XL seat and an MIK rear rack, Big Sur Sport delivers the same level of power, comfort, and smoothness of its bigger brother.
Technical Specifications

MODEL

Big Sur Sport

MOTOR

750W (Rated) / 1200W (Peak), 48V Brushless Rear Hub Motor

THROTTLE

Throttle on Demand

DISPLAY

Color LCD, Smart Easy-to-Read Display with Backlight

SPEED

Up to 28 MPH Pedal Assist, 20 MPH Throttle Only

BATTERY

Removable Internal Lithium-ion 48V, 15Ah (720Wh) with LG M50LT 21700 cells

REAR RACK

MIK HD

SENSORS

Torque Sensor

PEDAL ASSIST

5 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

74 lbs. (Battery included)

PEDALS

9/16' Alloy Platform

FORK

Suspension Fork with 80mm Travel, Adjustable Preload & Lockout

WEIGHT LIMIT

400 lbs.

KICKSTAND

Included, Aluminum Alloy Kickstand 

CRANKSET

160mm w/ 52T

SHIFT

Shimano 7 Speed

GEAR RATIO RANGE

11-28T

BRAKES

Tektro Hydraulic Disc Brakes

ROTOR

203 mm

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

20" x 4" Puncture Resistant

SADDLE

AIMA Comfort, 280mm*270mm Saddle

SEATPOST

Aluminum Alloy, 30.4mm 2-Bolt Clamp

STEM

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

SEAT CLAMP

34.9 mm Quick Release

HANDLEBARS

Aluminum Alloy Double Wall, 31.8mm, 680mm

HEADSET

Sealed Bearing Headset

GRIPS

Ergonomic Comfort

*Ebike Range: Explained

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!

Exclusively available for purchase at an Authorized AIMA Dealer

Find your Local AIMA Dealer here!

Geometry and Fit

Features

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.

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.

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.

20” x 4” Fat Tires

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!

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.

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.

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.

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.

Controller Compartment

Mid-drive? Not quite! Our mid-mounted controller cavity allows for streamlined assembly and repair, while also bolstering the controller's heat dissipation capabilities, improving the bike's performance and safety.

Video Gallery

Multi-column

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.

Customer Reviews

Based on 10 reviews
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D
David Helton
Too Much Fun

Best purchase I’ve made in years. Guaranteed to make you smile like a kid, even when riding up a steep hill. 800 miles since February, no issues. Only thing I added was the tire inserts for flat protection. Nice to be able to throttle at start off - then peddle to save your knees. Great exercise without feeling sore the next day.
My wife, daughter and granddaughter each tried my bike - and each of them
now have one. My son-n-law had a more expensive, heavier e-bike - after borrowing my daughter’s Big Sur - he bought a one that he rides 90% of the time now. We just ordered two more, so we have extras for other family members to ride when they visit. Just Too Much Fun 👍

L
L.L.
2 Gals 22 & 57 Tell All

We went around and tried every single e-bike we could find within about 30 mi radius. Although we did find some really nice bikes, this particular bike was the one we went with. Besides the fact that the entire bike had been certified, not just the battery was one of the reasons why. The other reason is because the sprocket is larger and it feels like a 26-in bike. We do not like the foldables and this bike gives you more options for comfort. The front forks will take any abuse and the bike is light enough to manage in the smallest spaces. I was always afraid of a fat tire bike, but this one responds as if it is a thin tire mountain bike. I live an active lifestyle and always have and to be honest my second ride we went 40 MI.
That was about a good half day trip so I'm going to get an extra battery so that I can enjoy it much longer. E-Bikes level the playing field for everybody to enjoy including Grandma and Grandpa. We are still adding a couple of things to our bikes, but this is where they're at after a couple of weeks. It's so much fun to customize your own bike as well.

I highly suggest this bike so enjoy!.

J
Jack
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!

J
J.Z.
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....?

V
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.

Hi Vincent, thanks for the awesome review! We're glad you found us and that you're enjoying your Big Sur Sport bikes. It's great to hear they're worth the extra cost. We appreciate the feedback about the headlight and will definitely work on improving it. Enjoy your rides and happy biking!

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We are more than happy to help answer any question you may have!