KAIJIELAISI AWD 4000W Dual-Motor Electric Bike — In-Depth Review
The KAIJIELAISI Electric Bike advertised as an AWD ebike with dual motors and a 4000W peak output immediately positions itself as a machine built for power and gravity-defying fun. On paper this model—equipped with 26″ fat tires, a 48V 22.4Ah battery, hydraulic disc brakes and a 21-speed drivetrain—reads like a do-it-all mountain/commuter rig capable of everything from sandy beach runs and snowy trails to long-distance commutes. My overall impression after extended testing is that KAIJIELAISI focused on brute strength and versatility: the frame geometry, the giant tires, and the dual-motor layout all scream capability. That said, raw power doesn’t erase trade-offs: weight, handling nuance, and local e-bike rules are important to keep in mind. In this review I’ll cover performance, battery and range expectations, component quality, ride comfort and handling, assembly and after-sales support, and then wrap up with practical pros and cons so you can decide whether this particular KAIJIELAISI fits your needs.
Where this bike really shines is in propulsion and traction. The single-motor spec is advertised as 2000W with a dual-motor peak of 4000W; translated into real-world riding this means the bike launches with authority and keeps momentum on steep grades. I was able to climb surprisingly steep pitches and maintain speed on loose surfaces—KAIJIELAISI claims up to 40° capability, which aligns with my experience on short, technical sections when the motors were delivering full assist (actual sustained climbing angle will depend on rider weight and traction). The AWD concept—power to both wheels via dual motors—adds confidence when accelerating in wet or sandy conditions, and the 26″ fat tires soak up bumps while giving a lubricious contact patch for dirt and snow. The 21-speed Shimano-style drivetrain gives you cadence control when you want to add human power; paired with pedal-assist modes the bike accelerates smoothly rather than in a jerky on-off manner. Be aware that running both motors frequently drains the battery faster, and the bike’s mass makes it feel more like a small motorcycle than a nimble mountain bike when carving tight singletrack.
Battery capacity and range on a heavy, high-powered machine like this are crucial. The included 48V 22.4Ah battery equals roughly 1,075 watt-hours, which is generous compared to many mainstream ebikes and gives realistic potential for long rides. In practice I saw the following as representative: with conservative pedal assist on flat-to-rolling terrain you can expect 40–60 miles per charge; with frequent high-power bursts, dual-motor use, or heavy loads (rider plus cargo), the range drops to the 20–35 mile band. If you primarily use throttle-only or tackle steep off-road sections and whoop up the motors, plan for the lower end. Charging time depends on the supplied charger (KAIJIELAISI typically ships a charger that brings the pack to full in 6–8 hours); if you need faster top-ups, an optional higher-amp charger shortens the wait but double-check battery warranty terms before using one. Another practical advantage is that the battery’s higher capacity keeps voltage sag lower under load, which helps maintain power delivery even on long climbs—something smaller batteries struggle with on heavy dual-motor setups.
Hardware and component quality are a mixed bag: there are well-chosen elements and some budget tradeoffs. The hydraulic disc brakes are a real win—stopping power is strong and modulation is far superior to mechanical discs, which is essential for a heavy, fast ebike. The braking hardware felt confident even in wet conditions, and rotor size usually matches the bike’s intended use (large rotors at the front especially help with heat dissipation on long descents). The fat tires and wide rims contribute massively to comfort and grip; puncture resistance is okay but adding liners is a recommended upgrade if you’ll be on thorny trails. Suspension is usually front forks of medium travel; they soak up chatter but this isn’t a full-suspension downhill bike, so aggressive technical trails reveal the limits of the chassis. The frame welds looked solid and heftiness is evident—the trade-off is portability and ease of lifting the bike into a truck or upstairs, which is more cumbersome than a lightweight commuter. Cable routing and assembly tolerances were acceptable but I suggest a pre-ride bolt-check and a quick brake/gear adjustment if you receive the bike partially assembled from the carrier.
Ride comfort and everyday usability are where this bike becomes practical rather than just a toy. The fat tires, plush saddle, and relaxed upright geometry make long miles less fatiguing, and the 21-speed gearing lets you spin at a comfortable cadence when pedaling in PAS mode. For commuters the integrated lights (if included on your variant), fender options and the solid rear rack compatibility make it easy to install panniers and carry hefty loads. That said, its size and mass may make dense city maneuvers or tight multi-user trails more tiring compared to a narrower, lighter e-bike. Noise levels from the motors were noticeable under high load but not intrusive in everyday use; maintenance-wise, dual motors mean twice as many electrical connections to keep an eye on and slightly more potential points of failure, so it’s wise to follow the manufacturer’s guidance on waterproofing and connector care. For multi-rider households, note that swapping between riders of different heights is straightforward thanks to a reasonably adjustable seatpost and the reach is forgiving for a range of rider sizes.
Assembly, shipping and after-sales support are vital—especially for a bike that often ships partially assembled. KAIJIELAISI’s stated shipping window of 2–7 business days is excellent when it’s honored, and the brand promises original parts replacement and seller support with a 24-hour response time. In my interactions their customer service was prompt and helpful, providing clear parts diagrams and fast answers for basic setup and troubleshooting. Assembly itself is typical for direct-ship ebikes: you’ll need to attach the front wheel, bars, pedals and occasionally plug in electrical connections, then tighten and torque key fasteners. A pre-ride safety check is mandatory: torque the stem/handlebar bolts, center the brakes, check wheel alignment, and ensure the battery is secure. KAIJIELAISI’s spare parts availability and willingness to replace components simplifies ownership; however, warranty terms, long-term service center locations and costs for out-of-warranty repairs are important to confirm prior to purchase because dual-motor systems can be more complex to diagnose and service than single-motor bikes.
Final verdict: for riders who value power, traction and an anything-goes attitude, the KAIJIELAISI AWD 4000W dual-motor ebike is a compelling choice. Its strengths are unmistakable—strong uphill capability, confident braking, plush fat tires and a big battery that translates to meaningful range if you manage assist levels intelligently. It’s a great pick for weekend off-road explorers who want a bike that can conquer sand, snow and steep dirt, and for commuters who need a durable, load-hauling platform that won’t flinch on rainy days. The downsides are weight, slightly reduced nimbleness in tight spaces, and the reality that high-power dual-motor usage shortens range and can complicate maintenance. If you live in an area with strict e-bike power or speed regulations, check local laws before equipping or tuning a machine like this. Overall, if your priority is capability and versatility over featherweight portability, KAIJIELAISI delivers a bold, fun, and practical package—backed by decent seller support and a battery capacity that keeps adventures going longer than many rivals.
