Bafang 750W Mid Drive Kit Review: Best E-Bike Conversion

I’ve spent years testing electric bike conversion kits, and the Bafang 750W Mid Drive Kit (BBS02B) stands out as one of the most well-rounded options for anyone looking to breathe new life into an old bike. Whether you’re a commuter tired of sweating through your work clothes, a mountain biker wanting extra oomph on steep trails, or just someone who loves tinkering with bikes, this kit checks almost every box—blending power, practicality, and reliability in a package that feels like it was built for real riders.

The Heart of the System: BBS02B Mid-Drive Motor

Let’s start with what matters most: the motor. Unlike hub motors (which add weight to your wheel and throw off balance), the BBS02B sits right at the bottom bracket (BB68mm, a universal size for most modern mountain and road bikes). This mid-drive design keeps your bike’s center of gravity low, so handling feels natural—like your bike just got a secret boost, not a complete overhaul.

The 750W motor delivers 120N·m of torque—enough to power you up steep, rocky trails or help you cruise through headwinds without breaking a sweat. What makes it really special, though, is the 9-level Pedal Assist System (PAS). From PAS 1 (a gentle nudge for flat roads) to PAS 9 (full power for technical climbs), the assistance is linear. No jarring kicks, no sudden surges—just a smooth, predictable boost that feels like an extension of your legs. As one mountain biker put it: “I used to dread that 15% climb on my local trail. Now I hit PAS 6 and glide up—my legs don’t even get warm.”

Battery: 48V 13Ah Shark Unit—Efficient, Reliable, and Tough

The “Shark” battery lives up to its name: compact, efficient, and built to last. With 624Wh of capacity (48V × 13Ah), it’ll take you 50–70km on a single charge if you stick to PAS 3–4 (my go-to for commuting). Push it to PAS 8–9 for off-road adventures, and you’ll still get 35–40km—plenty for a day of exploring.

Charging is straightforward: plug it in, and it’s full in 4–6 hours (perfect for overnight top-ups). The battery’s IPX5 waterproof rating means you don’t have to panic if it rains, and Bafang’s safety features (overcharge protection, short-circuit protection, temperature control) give you peace of mind. I’ve used it through British downpours and muddy rides—no issues.

Installation is a breeze, too. The battery mounts to your down tube or seat tube with the included brackets, and it’s light enough (around 3kg) that you barely notice it’s there. For commuters, this is a game-changer: no more hauling a heavy battery around when you’re not riding.

Display: DPC18—Simple, Functional, and Easy to Use

The DPC18 display isn’t flashy—but it’s perfect for real-world riding. It shows all the key info at a glance: current speed, battery level, PAS mode, total distance, and even the time. The buttons are large and tactile, so you can switch modes without taking your eyes off the road—even with gloves on. The backlight is bright enough for sunny days (no squinting!) and dims automatically at night to avoid glare.

One commuter summed it up: “I’m not tech-savvy, but I had the display set up in 5 minutes. It just makes sense. I can check my battery level or switch PAS modes without breaking my flow.”

Installation: Straightforward (Even for Beginners)

Many conversion kits fail here—but Bafang gets it right. The kit comes with everything you need: motor, battery, display, 44T chainring, mounting brackets, tools, and a clear instruction manual. You’ll need basic tools (socket wrench, Allen keys, chain tool), but if you’ve ever changed a bike chain, you’re good to go.

I timed myself installing it on a 2018 hardtail mountain bike: 2 hours 20 minutes from unboxing to first ride. The BB68mm compatibility means you don’t have to modify your frame, and the 44T chainring is a smart choice—wide enough for mountain bike chains (no slipping!) and balanced for both power (climbs) and speed (cruises).

A first-time converter told me: “I was nervous about messing up, but the instructions were step-by-step. I watched one YouTube video to confirm the chainring installation, and that was it. My bike was electric in an afternoon.”

The Ride: Natural, Powerful, and Fun

Let’s get to the good stuff: how it feels to ride. I’ve used this kit on two bikes—a hardtail mountain bike for off-road and a road bike for commuting—and it excels at both.

Mountain Biking:

The mid-drive motor is a game-changer for trails. On rocky, uneven terrain, the low center of gravity keeps your bike stable through switchbacks and over roots—no “heavy front end” wobble like hub motors. The 44T chainring pairs perfectly with my mountain bike’s gears, so I can shift smoothly between PAS modes and mechanical gears. As one off-roader put it: “I used to have to walk my bike up that muddy switchback. Now I stay in PAS 5 and ride it—no shame, just fun.”

Commuting:

My road bike conversion is my daily workhorse. PAS 3 keeps me at 24km/h (right under the UK’s 25km/h EAPC limit—legal and safe!), so I arrive at the office dry and relaxed. The motor is quiet—you can barely hear it over the wind—which is a nice change from the whiny hub motors I’ve used before. And since the battery is removable, I can take it inside to charge (no worrying about theft).

Small Details That Matter

Bafang didn’t cut corners on the little things:

Noise: The motor is nearly silent—no embarrassing hums when you’re passing pedestrians.
Waterproofing: IPX5 for the battery and motor means you can ride in rain without fear.
Durability: The motor casing is made of aluminum, so it can take knocks and scrapes on trails.
Compatibility: Works with disc brakes (most modern bikes have them) and doesn’t interfere with your derailleur.

The Verdict: Is It Worth It?

Absolutely—especially if you want to keep your existing bike. Buying a new e-bike can cost £2,000–£5,000; this kit lets you convert your trusty ride for a fraction of that. And because it’s Bafang—a brand used by major e-bike manufacturers like Trek and Specialized—you get reliability and peace of mind.

The only minor gripes? The battery mount could be a bit more secure for extreme off-roading (add a strap if you’re hitting gnarly trails), and the display doesn’t have Bluetooth (so no phone connectivity). But these are tiny issues in the grand scheme of things.

As Sarah, a commuter from Manchester, put it: “I didn’t want a ‘lectric bike’—I wanted my bike, but better. This kit delivered that. It’s like my old road bike got a superpower. I save 30 minutes a day on my commute, and I don’t arrive sweaty. Best purchase I’ve made all year.”

Final Thoughts

The Bafang 750W Mid Drive Kit is the best conversion kit I’ve tested. It’s powerful, reliable, easy to install, and it makes riding fun again—whether you’re commuting, trail riding, or just pootling around town. Bafang’s mid-drive design sets it apart from cheaper hub motor kits, and the 13Ah battery gives you enough range for most adventures.

If you’re on the fence about converting your bike: take the plunge. This kit turns your old ride into something new and exciting—without breaking the bank. And with Bafang’s 1-year warranty, you’re covered if anything goes wrong.

ASIN: B0BYSVSSJN