CHEMYO Electric Bicycle Conversion Kit Review

If you’re a UK cyclist tired of struggling up hills, fed up with crowded commuter trains, or just want to breathe new life into your old bike, the CHEMYO Electric Bicycle Conversion Kit could be the solution you’ve been waiting for. We’ve spent weeks testing this kit, spoken to dozens of users, and put it through its paces on city streets, country lanes, and even a few steep Sheffield hills—and it’s safe to say: this isn’t just another cheap conversion kit. It’s a well-designed, user-friendly upgrade that turns ordinary bikes into reliable electric powerhouses.

Installation: Simple Enough for Beginners

Let’s start with the part everyone dreads: installation. The CHEMYO kit takes the hassle out of conversion by delivering a pre-assembled aluminum double-wall rim and 1500W brushless hub motor. No need to fiddle with wiring the motor to the wheel—just swap your original tire onto the new rim, attach the controller, display, and other components, and you’re ready to ride.

Sarah, a commuter from Manchester, told us: “I’m not mechanically inclined—I can barely change a tire without help. But the pre-built wheel made it so simple. I followed the instructions (which have clear pictures, by the way) and had my 2018 mountain bike converted in 85 minutes. My partner couldn’t believe I did it alone!”

Our team tested the installation too, and Sarah’s experience holds up. You’ll need basic tools (a wrench, screwdriver, tire lever), but nothing you don’t already have in your garage. The instructions are written in plain English—no tech jargon—and the only critical rule is: use a 48V battery. Skip this, and you risk damaging the motor—but as long as you stick to the voltage, you’re golden.

Power & Performance: Hills? No Problem.

The 1500W brushless hub motor is the heart of this kit—and it’s a beast. It pushes the bike to a max speed of around 35km/h (perfect for zipping through city traffic) and delivers enough torque to handle 12% gradients without breaking a sweat. We tested it on a steep Peak District hill with a 10kg backpack, and the motor didn’t skip a beat—no more getting off to push.

But it’s not just about brute force. The brushless motor is quieter, more efficient, and longer-lasting than older brushed models. Mark, a bike mechanic from Leeds, who’s fitted dozens of kits, said: “Brushed motors wear out fast and get noisy. The CHEMYO’s brushless motor? I’ve had one on my own bike for six months, and it’s still as quiet and powerful as day one.”

For legal road use in the UK (where EAPCs—electrically assisted pedal cycles—require 250W/25km/h limits), the kit lets you adjust power via the controller. Crank it up to 1500W for off-road trails or private land—ideal for mountain bikers or adventure seekers.

LCD3 Display: Smart, Simple, Essential

The LCD3 display is a standout feature for everyday riders. Mounted on the handlebars, it shows:

Battery percentage (no more guessing when you’ll run out of juice)
Current speed
Total one-way distance
Wattage (how much power you’re using)
PAS (pedal assist) level
Error codes (for quick troubleshooting)

We love the battery indicator most. On a 10km commute, we could see exactly how much power we’d used—no more panic about being stranded. The error codes are equally useful: when we accidentally swapped two wires during testing, the display showed an E02 code. We checked the manual, fixed the wiring, and were back on the road in five minutes.

Mark the mechanic praised this too: “The error codes save so much time. Instead of spending hours tracing wires, I can diagnose problems in minutes. That’s a big deal for DIYers and pros alike.”

PAS System: Natural, Effortless Riding

If you hate the “on/off” feel of pure throttle bikes, the pedal assist system (PAS) will win you over. It detects how hard you’re pedaling and adjusts the motor’s power accordingly—gentle boost on flat ground, extra oomph on hills. It feels natural, like your bike is “helping” you instead of doing all the work.

Emma, a freelance writer from Birmingham, said: “I love the PAS. I still get exercise, but I don’t arrive at meetings dripping with sweat. It’s the best of both worlds.”

We tested the PAS on a 25km country ride, and it kept our legs fresh without making us feel lazy. For commuters, it’s a game-changer—you get the benefit of electric power without sacrificing fitness.

Compatibility: Fits Almost Any Bike

One of the CHEMYO kit’s biggest strengths is its wide compatibility. It fits wheels from 20 inches (great for folding bikes or kids’ bikes) up to 700C (perfect for road bikes and hybrids). We tested it on three bikes:

A 26-inch 2015 mountain bike
A 28-inch 2020 city bike
A 700C 2022 road bike

It fit all three without modifications. That’s rare—most kits only work with specific wheel sizes—but this one covers nearly every bike you’re likely to own. Whether you’ve got a retro 1990s mountain bike or a sleek new commuter, this kit will work.

What’s in the Box? Everything You Need

The kit includes all components required for installation:

Pre-assembled 1500W brushless hub motor (with aluminum rim)
Controller (plus a free controller bag to protect it from water/damage)
LCD3 display
Thumb throttle
Cut-off brake levers (stops the motor when you brake—critical for safety)
PAS sensor (pedal assist)
Torque arm (prevents motor torque from damaging your bike’s frame)
Cable ties and mounting hardware

The torque arm is a small but vital detail. High-power motors can pull apart bike dropouts (the part where the wheel attaches), but the torque arm distributes force to keep your frame safe. It’s a feature many cheap kits skip—but CHEMYO didn’t.

Real-World Use: Commutes, Family Rides, Adventures

We spoke to users across the UK, and their stories say it all:

Tom, a London delivery driver: “I do 50km a day delivering packages. Before the kit, my legs were killing me by 5pm. Now? The motor does the hard work. I finish my shift feeling fresh, and I save money on fuel. It’s been a game-changer for my business.”
Lisa, a Bristol mum: “I converted my old 24-inch kids’ bike so I could keep up with my kids on family rides. We went on a 25km ride last weekend, and I didn’t get tired once. It’s made our days out so much more fun.”
Emma, the Birmingham writer: “I use it for my 8km commute. No more crowded trains, no more sweat-stained shirts. The PAS lets me get exercise while still arriving on time.”

The Verdict: Worth Every Penny

Is this kit perfect? Almost. The only minor gripe is the controller’s size—but the free controller bag tucks it neatly under your seat. And while the kit doesn’t include a battery, that’s a plus: you can choose a 48V battery that fits your budget and range needs (we recommend a 15Ah battery for 45km+ range).

For UK cyclists looking to upgrade without buying a new e-bike (which can cost £1,000+), this kit is unbeatable. It’s easy to install, powerful enough for hills, compatible with nearly any bike, and packed with smart features.

Lisa from Bristol summed it up best: “This kit has made me fall in love with cycling again. My old bike feels new, I save money on commuting, and I get to spend more time outside with my kids. What’s not to love?”

ASIN: B0BZ4X7Y89