DYU C9 Electric Bike Review: 750W Motor, Long Range & More – Under $900!

The DYU C9 Long Range Electric Bike is one of the most impressive e-bikes in the market today. With its affordable price, foldable design, and powerful motor, it promises to deliver a well-rounded riding experience. In this comprehensive review, we’ll go through every aspect of the DYU C9, from its design and build quality to its performance, battery life, and overall value for money. Let’s get started.
Overview of the DYU C9 E-Bike
The DYU C9 is a foldable electric bike that combines practicality and power. Available in two colors – green and white – it is designed to be portable and user-friendly. At a price point of just $899, it is highly accessible, especially considering the range of features it offers.
One of the standout aspects of the C9 is its long-range capability, offering up to 51 miles on a single charge using pedal assist. Additionally, for those who prefer throttle-only riding, the range is estimated between 37 and 39 miles. The bike is equipped with a 750W motor, hydraulic disc brakes, and a comfortable, well-cushioned seat, making it a compelling option for both city commuting and off-road adventures.
Design and Build Quality

Foldable Frame Design
The DYU C9 is built with a foldable aluminum alloy frame, making it easy to transport and store. With a total weight of just 66 lbs, the bike is relatively lightweight for its category. The folding mechanism includes a latch located at the frame’s center, allowing the bike to fold in half and significantly reduce its size for storage or transport in a vehicle trunk.
Aluminum Alloy Frame: Lightweight and Durable
The use of aluminum alloy in the frame provides a balance between strength and weight, making the C9 both durable and easy to maneuver. It is also rated IP54 for water resistance, meaning it can withstand dust and water splashes, although it is not recommended to ride in heavy rain.
Accessories and Customization

Front and Rear Baskets
The DYU C9 offers optional front and rear baskets for added storage. The front basket is relatively small, suitable for carrying lightweight items such as water bottles or grocery bags. The rear basket, however, is notably large – almost twice the width of the bike – allowing for significant storage capacity. This makes the C9 a great option for shopping trips or carrying personal items.

Child Seat Installation and Features
For parents looking to take their kids along for the ride, the C9 offers a child seat attachment for just $89. The seat includes a padded backrest, footrests, and handle grips for added comfort and safety. It even comes with a small lockbox for storing small items such as juice boxes, keys, or a smartphone.
Performance and Power

750W Motor: Power and Speed
The DYU C9 is powered by a 750W rear hub motor, which is more powerful than many bikes in its price range. It offers impressive acceleration and can reach a top speed of 28 mph. The bike features five pedal assist modes and a throttle for easy control over speed and power delivery.
Battery Life and Charging
The C9 is equipped with a 48V, 15.6Ah lithium-ion battery that is removable for convenient charging. The estimated range using pedal assist is up to 51 miles, while throttle-only mode can provide between 37 and 39 miles. Charging the battery from empty to full takes approximately 7-8 hours, making overnight charging a practical option.
Braking System: Hydraulic Disc Brakes
One of the standout features of the DYU C9 is its hydraulic disc brakes. Unlike many other e-bikes in this price range that use mechanical brakes, the C9 includes fully hydraulic brakes on both the front and rear wheels, providing superior stopping power and control.
Cockpit and Controls
The cockpit of the C9 is well-designed, featuring leather-wrapped grips, a digital display, and a thumb throttle. The display shows vital information such as speed, battery level, and pedal assist mode. The bike also includes an adjustable handlebar and seat post to accommodate riders of varying heights.
Comfort and Suspension
The seat on the DYU C9 is one of its most comfortable components. It is padded and includes a suspension seat post with built-in springs to absorb bumps. Combined with front suspension forks, the overall ride quality is remarkably smooth.
Off-Road Performance Analysis
With its 20-inch by 3-inch pneumatic tires, the C9 performs well on various terrains, including sand, grass, and compact dirt. The tread pattern is unique, resembling a series of diamonds that provide excellent grip and stability. The suspension seat post also helps absorb shocks, providing a smoother ride even on bumpy surfaces.
Pro's & Con's
-
Affordable at just $899
-
Powerful 750-Watt Motor
-
Long Range Battery
-
Comfortable Suspension Seat
-
Hydraulic Disc Brakes
-
Lightweight, Foldable & Portable
-
Slight Delay In Pedal Assist Activation
-
Motor Can Be Noisy Under Acceleration
-
Long Charging Time 7-8 Hours
-
Brakes Had A Squeak After Testing
-
Whistle Or Whine Coming From Front Wheel Sometimes
-
Lightweight, Foldable & Portable
Final Verdict: Is the DYU C9 Worth It?
Overall, the DYU C9 Long Range Electric Bike offers exceptional value for its price. With its robust motor, comfortable seat, hydraulic brakes, and foldable design, it is ideal for city commutes and off-road excursions alike. The minor drawbacks, such as the pedal assist delay and motor noise, are outweighed by the bike’s overall performance and features. For under $900, the DYU C9 is a compelling option for those seeking a budget-friendly, high-performance e-bike.

Frequently Asked Questions (FAQs)
How long does it take to charge the DYU C9 battery?
Charging from empty to full takes approximately 7-8 hours.
Can the bike handle off-road terrain?
Yes, the C9 performs well on sand, grass, and compact dirt thanks to its durable tires and suspension seat post.
Is the child seat included in the base price?
No, the child seat is an optional accessory that costs $89.
What is the maximum weight capacity of the bike?
The C9 can support riders up to 265 lbs.
Does the bike come with hydraulic brakes?
Yes, it is equipped with front and rear hydraulic disc brakes.
Can the bike be folded for storage?
Yes, the frame can be folded in half, and the handlebars can be lowered for easier transport and storage.
Stay tuned for more in-depth reviews and electric bike comparisons at HobartReviews.com!
Watch My YouTube Review

About The Author
Eric “Hobart” is the founder of Hobart’s Reviews, specializing in electric scooters, e-bikes, and accessories. With over 10,000 miles ridden and more than 40 models reviewed, Hobart brings firsthand experience and expert insights to his audience. Follow his comprehensive reviews on his YouTube channel and website for trusted advice and detailed evaluations.