DYU C9
URL: https://electricrevolutionreviews.com/reviews/dyu-c9
Published: 2026-10-29T17:10:02.708+00:00
Updated: 2026-10-29T17:10:03.389949+00:00
Category: Electric Mobility
Keywords: dyu c9 review, dyu c9 ebike, best passenger e-bike under 1000, folding electric bike, electric mobility, budget commuter ebike, lectric xp 3.0 alternative, dyu cycle

I tested the DYU C9, a folding step-through e-bike that delivers a 750W motor, hydraulic brakes, and optional two-passenger capabilities for under $1,000.

The good:
- Topped out at 26 mph on flat ground in pedal-assist level 5
- Conquered a 15% grade hill from a dead stop using only the throttle
- Seat post suspension and thick, vented saddle provided an incredibly cushy ride
- Thumb throttle delivers instant, aggressive acceleration without needing to pedal
- Equipped with hydraulic mineral oil brakes that stopped me from full speed in roughly 25 feet

The trade-offs:
- Pedal assist takes a full 4 to 5 crank revolutions to actually kick in
- Rear end fishtailed slightly when braking hard on smooth surfaces
- Maximum payload capacity is just 265 pounds, which is low for a two-passenger setup
- I experienced slight handlebar shake when riding one-handed around 20 mph
- Visible, messy welding scars around the head tube and frame joints
- Long 7 to 8 hour charge time for the battery

Specs:
- Motor: 750W
- Battery: 48V 15.6Ah
- Range: 80±3 km
- Top Speed: 28 mph
- Charge Time: 7 to 8 hours
- Weight: 66 lbs
- Weight Limit: 265 lbs
- Brakes: Mineral oil brakes
- Suspension: Seat post suspension, front fork suspension

Review:
Overview

Finding a passenger e-bike for under $1,000 used to be nearly impossible, but the DYU C9 hits the market with a base price of just $900. Even after adding the optional passenger accessories, the total still stays under that $1,000 threshold. It is a folding, step-through e-bike designed for urban living and light commuting, built by a company that claims to have sold over 500,000 bikes across 50 countries.

What makes this model notable isn't just the price tag, but the inclusion of components that used to be reserved for higher-tier bikes. The standout inclusion here is hydraulic mineral oil brakes, which were practically unheard of on sub-$1,000 bikes just a few years ago. I wanted to see if the build quality and riding dynamics could actually hold up to that impressive spec sheet.

Real-World Performance

I put the 750W motor through its paces, and the power delivery is a tale of two extremes. When using the five pedal-assist levels, the acceleration is what I would call less than standard. It took about four to five full pedal revolutions for the motor to actually kick in. However, when you use the thumb throttle, the power hits instantly and it hits hard. If you want to rip off the line on this bike, the throttle is absolutely the way to go. On pedal-assist level 5, I maxed out at 26 mph on flat ground, just shy of its 28 mph rating.

To test its hill-climbing ability, I took the C9 to a 15% grade hill that is about half a block long. I started at the bottom from a dead stop without any momentum, relying purely on the throttle. By the time I reached the top, the bike was pulling me up at 7 mph. That is a very respectable showing for a budget motor on a steep incline.

Braking and range also held up well in my testing. Coming down the road at full speed, I slammed on the hydraulic brakes and stopped in about 25 to 30 feet, though the rear end did fishtail a bit on the smooth surface. For range, the 48V 15.6Ah battery took me on a 6-mile test ride where I was pushing the bike to its top speed. I only lost one battery bar out of a full charge by the time I got home. DYU claims an 80 km (roughly 50 to 52 mile) maximum range, and based on my usage, I think 50 miles is doable if you ride more conservatively than I did.

Design & Build Quality

The bike weighs 66 pounds and features a folding frame. You can drop the handlebars, fold the pedals, lower or remove the seat, and break the frame right in half, making it fairly easy to toss into the back of a car. The frame itself has a cool sparkle paint job, though I was disappointed by the welding scars near the head tube and joints—it is definitely not the cleanest welding job I have seen, which is a hallmark of its budget price point.

In terms of ride comfort, the C9 excels. The saddle is extremely thick and cushy with a center vent hole, and it sits on top of a seat post suspension that provided great travel when I bounced on it. The front fork suspension is basic and can be bottomed out if you push hard enough; in my testing, the only time I actually bottomed it out was when hitting a 3-inch curb at 25 mph. 

I did notice a minor stability issue during my rides. When traveling around 20 mph with only one hand on the grips, the front end started to shake and wobble a little bit. Additionally, the overall carrying capacity is 265 pounds. In my opinion, that is a bit light for a designated two-passenger bike, meaning the rear seat is definitely meant for a small child or a very light rider.

Key Features

I spent some time installing the optional passenger kit, which includes a plush rear pad, a backrest, foot pegs, and velcro wheel guards to keep loose clothes out of the spokes. They also included a locking, reflective storage box that mounts securely behind the passenger seat, featuring a nice interior lip so your belongings will not spill out.

The bike features a great cockpit setup. The handlebars have a quick-release mechanism allowing you to rotate them forward or backward, and the height adjustability is massive—accommodating riders from 5'2" all the way up to 6'4". You get stitched leather wing-tipped grips and a smooth 7-speed trigger-style rapid-fire shifter, which is a huge upgrade over the cheap SIS index thumb shifters usually found at this price.

Lighting and safety are also well-integrated. The tail light flares up brightly whenever you pull the brake levers, and the system includes motor cut-offs for immediate stopping power. Finally, the battery is fully removable with an included key, though you will need to plan ahead since a full recharge takes a lengthy 7 to 8 hours.

Who It's For

I recommend the DYU C9 for budget-conscious urban commuters who want the flexibility to occasionally haul a small child or lightweight passenger. If you value comfort features like a suspension seat post, hydraulic brakes, and a punchy throttle without breaking the $1,000 mark, this is a highly capable option.

Who Should Skip It

You should skip this bike if your combined passenger weight exceeds 265 pounds, or if you rely heavily on pedal-assist for your riding. The 4 to 5 crank revolution delay makes pedaling feel unresponsive, so riders who want a natural, bicycle-like feel should look elsewhere.

How It Stacks Up

In my testing experience, the most direct competitor to the DYU C9 is the Lectric XP 3.0, which carries the exact same base price tag. Both are folding, step-through e-bikes that offer passenger capabilities. However, the DYU C9 sets itself apart by including hydraulic mineral oil brakes right out of the box, whereas many bikes in this exact segment still rely on mechanical disc brakes. If raw stopping power and a cushy seat post suspension matter most to you, the C9 brings incredible value to this specific match-up.

Final Verdict

For a base price of just $900, the DYU C9 delivers far more than just a cheap folding frame. While the pedal assist delay and messy welds reveal its budget nature, the impressive hill climbing, 26 mph top speed, and inclusion of hydraulic brakes make it a standout choice for light urban hauling.

Questions & Answers:
Q: How fast does the DYU C9 e-bike go?
A: The DYU C9 has a speed rating of 28 mph. In my testing, I hit 26 mph on flat ground using pedal assist level 5.

Q: Is the DYU C9 good for climbing hills?
A: Yes. I tested the DYU C9 on a 15% grade hill from a dead stop using only the throttle, and it pulled me to the top hitting 7 mph.

Q: How long does it take to charge the DYU C9?
A: The 48V 15.6Ah battery takes about 7 to 8 hours to reach a full charge.

Q: Does the DYU C9 fold for storage?
A: Yes, the DYU C9 is highly portable. The handlebars fold down, the pedals fold in, and the main frame breaks in half for easier transport.

Q: Can the DYU C9 carry a passenger?
A: Yes, it supports optional passenger accessories like a rear pad and foot pegs. However, the total carrying capacity is only 265 pounds, making it best for a small child or light rider.

Source video: https://www.youtube.com/watch?v=DCpGzGqYCW8

Disclosure: This is a paid review. The manufacturer paid Electric Revolution Reviews up front to test and publish this review. The opinions expressed are based on hands-on testing and remain editorially independent.

Read the full review at https://electricrevolutionreviews.com/reviews/dyu-c9