DYU C9
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Facts
Summary of Reviews
We have read all expert and user reviews on the DYU C9. In summary, this is what cyclists think.
8 reasons to buy
- The C9 has fenders, a headlight, a taillight with brake activation, and a rear rack rated for 55lb.
- Testers climb inclines up to 20% using only the throttle.
- Experts find the well-padded saddle comfortable.
- Reviewers appreciate the throttle's instant response and strong acceleration.
- The handlebar can be rotated fore and aft, and a quick-release clamp makes height adjustment easy.
- Reviewers find the low step-through frame makes the C9 easy to hop on and off.
- Experts are impressed with the stopping power of the hydraulic disc brakes and 180mm rotors.
- A tester relishes the C9's easy maneuverabilty.
12 reasons not to buy
- This bike's ability to exceed 20mph using the throttle doesn't comply with e-bike laws, so it may be illegal in most jurisdictions.
- Though they're unable to explain exactly what's going on, two reviewers complain about an off-putting sensation of the seatpost collapsing.
- Reviewers say the C9's short cranks make it hard to pedal, especially as ghost pedaling starts around 18mph.
- Experts lament the cheap suspension fork, which bottoms out over curbs.
- The pedal assist is extremely laggy, one tester counting to seven before PAS kicks in.
- The slow 2A charger takes up to 8 hours to fully charge the battery.
- Testers bemoan the C9's unstable feel, one feeling the bike shake at 20mph if both hands aren't on the handlebar.
- DYU markets the C9 for carrying cargo and big kids, but the bike can only carry 265lb.
- Testers complain of a stiff hinge. With optional cargo accessories installed, the C9 can't be folded.
- The C9's heavy 66.1lb weight makes it hard to lift and transport.
- The minimum seat height of 33.07” makes the 5’2”–6’4” stated fit range highly unrealistic.
- DYU’s customer support is unresponsive and seems incapable of reliably clarifying key aspects of this bike's specification.
Bottom line
The DYU C9 is a budget-price, electric, fat-tire folder with a 750W motor and 748.8Wh battery. The C9 scores points for being a smooth and comfortable ride, with a powerful motor and strong brakes. Throttle performance impresses, the motor responding snappily and climbing steep hills. However, extremely laggy pedal assist, short cranks, low gearing, and sluggish acceleration make pedalng hard work. The C9 is marketed as offering cargo-hauling utility and folding efficiency, but it’s heavy, has a low weight capacity, and doesn’t fold well. Despite the C9's weaknesses and legally dubious top speed, reviewers consider it a worthwhile budget option.
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