For cyclists looking to upgrade their trusty bike without splashing out on a brand-new e-bike, the ZAJCI Electric Bicycle Conversion Kit (20-inch, 36V/350W) is a game-changer. It takes the hassle out of electrification, offering a pre-assembled solution that lets you retain your favourite frame while adding the convenience of electric power—no complex wiring or professional tools required.
Installation: Simple Enough for Beginners
The biggest barrier to e-bike conversion is often the setup process, but ZAJCI eliminates this with a pre-installed hub motor and aluminium double rim. All you need to do is swap your original tyres onto the kit’s wheel and attach a few small components (like the LCD display and brake lever). Even if you’re not “handy,” this is manageable.
“I’m not someone who fixes bikes for fun, but swapping the tyres took under an hour,” says Sarah, a Manchester-based casual rider. “The motor was already in the rim—no wiring mess, no confusing parts. I felt proud of myself for doing it alone!”
This simplicity is a huge win for riders who want to upgrade without spending a weekend in the garage. It’s designed to get you on the road faster, not keep you stuck with tools.
Pedal Assist: A Natural, Comfortable Ride
One of the kit’s standout features is the pedal assist sensor (PAS), which sets it apart from throttle-only alternatives. Instead of relying on a hand-controlled throttle (which can cause wrist strain over long rides), the motor kicks in as you pedal. This creates a seamless experience—you’re still active, but the motor takes the edge off hills, headwinds, or tired legs. You can also switch to throttle mode for an extra boost when you need it, giving you total flexibility.
“I used to avoid longer rides because my old throttle kit made my wrist ache,” explains Mike, a Birmingham commuter. “With this one, I just pedal, and the motor helps out. It feels like my bike is with me, not against me. I can ride twice as far now without getting tired.”
This dual-mode system caters to all riding styles: commuters who want an easy trip to work, leisure riders who want to extend their adventures, and even fitness-focused cyclists who still want to get a workout.
Durability: Built to Last (Even for Tough Rides)
Conversion kits need to be tough—they’re attached to bikes that go through rain, mud, and daily wear. ZAJCI delivers here with high-quality materials:
- Aluminium rim & motor: Lightweight, rust-resistant, and strong enough to support up to 300 pounds (ideal for riders of all sizes or those who carry bags).
- Stainless steel components: The brake lever, wiring, and other small parts are made from stainless steel, so they won’t corrode over time.
- Safety-first design: The brake lever cuts power to the motor the moment you squeeze it, preventing sudden jolts and letting you stop smoothly.
“I ride my mountain bike on trails every weekend, and this kit has held up perfectly,” says Emma, a Leeds-based enthusiast. “The aluminium rim hasn’t rusted, even after months of rain, and the brake cutoff gives me confidence when I’m going down steep hills. It’s tough but doesn’t feel heavy—exactly what I need.”
Whether you’re commuting on city streets or tackling rural paths, this kit is built to handle it.
LCD Display: Practical, Not Gimmicky
The LCD display is more than just a “nice-to-have”—it’s a tool that makes your rides better. It’s bright and easy to read in sunlight, with all the data you could want:
- Speed metrics: Current, average, and maximum speed.
- Mileage tracking: Total and single-trip distance.
- Battery info: Real-time level so you never run out of power.
- Gear mode: See which assist level you’re using (1–5, depending on how much help you want).
- Fault indicator: Alerts you to small issues (like wiring tweaks) before they become big problems.
“I’m obsessed with the display,” admits Tom, a London hobbyist. “I love seeing my average speed on commutes and how much battery I have left for the way home. The fault indicator saved me once—it showed a minor wiring issue, so I fixed it before my ride. No more getting stuck halfway!”
This display turns guesswork into control—you know exactly how your bike is performing, and you can adjust your ride accordingly.
Customer Support: Help When You Need It
Great products are nothing without great support, and ZAJCI delivers here too. If you have a question (about installation, the display, or anything else), their team responds within 24 hours—with clear, step-by-step help (even with photos!).
“I had a small issue with the display calibration,” says Lisa from Glasgow. “I emailed them at 7pm, and by 9am the next day, they’d sent a guide with photos. It was fixed in five minutes. Great service—you don’t always get that with budget kits.”
This level of support is rare for conversion kits, and it gives riders peace of mind—you’re not alone if something goes wrong.
Who Is This Kit For?
This kit is versatile enough for almost any cyclist:
- Commuters: Cut down on travel time and arrive at work without breaking a sweat.
- Leisure riders: Extend your adventures—ride further, explore more, and have fun without fatigue.
- Experienced cyclists: Keep your favourite bike (the one you’ve had for years!) and add electric power to it.
“I’ve had my road bike for 10 years, and I didn’t want to buy a new e-bike,” says Dave from Cardiff. “This kit gave it a new life. Now I can keep up with my friends on 50-mile rides without feeling like I’m struggling. It’s like my old bike, but better.”
Final Thoughts: A Kit That Makes Cycling Better
The ZAJCI 36V/350W 20-inch Conversion Kit isn’t just a “way to add electric power”—it’s a way to fall in love with cycling all over again. It’s easy to install, comfortable to ride, durable enough for daily use, and packed with features that enhance (not overwhelm) your experience.
The positive feedback from riders across the UK—commuters, hobbyists, mountain bikers—speaks for itself: this is a kit that works for real people. It’s not the cheapest option out there, but it’s worth every penny for the quality, convenience, and support.
If you’re tired of struggling up hills, want to extend your rides, or just want to make cycling easier without replacing your bike, this kit is the answer.
ASIN: B0CRNRT3Z1
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