Full-suspension fat tire e-bikes have been gaining real ground over the past several years — and honestly, we didn't expect to be as impressed as we were. This one surprised us in the best possible way.
We've tested plenty of full-suspension fat tire bikes: trail riders, mid-drives, budget adventure bikes, luxury builds, and everything in between. But every once in a while, something comes along that genuinely earns its place in the lineup — and that's exactly the case here. The Onyx rides, looks, and handles like a bike built by people who actually use them.
About This Bike
This bike is available in both a Step-Over and Step-Through frame configuration, with sizes ranging from 5'1" to 6'1" depending on the version. With a starting price around $1,999, it sits in a competitive bracket — but the component list tells a different story than most bikes at this price point.
Power comes from a Truck Run mid-drive motor delivering a solid 750W continuous output and a torque figure that gives you confident control whether you're climbing a packed dirt trail or hauling groceries home. It's classified as a Class 2 e-bike, so the pedal-assist tops out at 20 mph — fully street legal with most local regulations.
The battery is a 48V system with roughly 14Ah of capacity, giving you a real-world range that comfortably covers 40 to 80 miles depending on terrain, rider weight, and assist level. That's impressive by any standard, and it means most riders won't feel range anxiety creeping in unless they're on a particularly aggressive multi-day route.
Shifting is handled by a Shimano 7-speed drivetrain — reliable, proven, and easy to maintain. The suspension features a dual-crown fork up front with rebound and preload adjustment, paired with a rear shock that tucks under the seat and smooths out the kinds of impacts that would rattle apart a hardtail.
Standout Features & Build Quality
While tire volume gets a lot of the attention on fat tire builds, the real highlight here is the suspension system. The front fork and rear shock combination transforms what could have been a sluggish off-road experience into something genuinely capable. Rough gravel, rutted trails, and patchy pavement are absorbed predictably — and that consistency is what makes long rides actually enjoyable.
Integrated Power Hub
The downtube doubles as a charging and accessory hub with USB-A and USB-C ports, letting you power lights, your phone, and small gear directly from the bike's battery system.
Full Color Display
The cockpit display shows all key metrics — speed, battery level, assist mode, trip distance — in a clean, glare-resistant panel. Easy to read even in direct sunlight.
Integrated Motor Cutoffs
Both brake levers include motor inhibitor sensors that cut power the instant you start braking — a safety-first feature that makes downhill and technical sections significantly more controlled.
Semi-Integrated Drop Saddle
The seatpost offers a few inches of drop movement, letting you lower your center of gravity on technical descents without stopping to manually adjust.
Step-Thru Available
Riders who prefer easier mounting — whether due to preference or physical need — have access to a low-step frame variant that doesn't sacrifice geometry or performance.
Fat Tire Confidence
26 x 4" tires deliver stability on sand, loose gravel, snow, and wet roots — terrain types where narrower tires require significantly more skill and concentration to navigate safely.
Who Is This Bike For?
This bike is built with a specific kind of rider in mind. If you're looking to cover ground you couldn't reach before — fire roads, dirt trails, backcountry camping trips, gravel paths — this platform opens those doors without requiring elite fitness or technical riding skills. The motor takes the edge off steep climbs and provides a smooth, progressive power delivery that doesn't feel artificial or sudden.
Campers and dispersed-living riders will especially appreciate how the frame handles cargo. The geometry is upright enough to feel relaxed on longer rides, while the suspension setup means you're not fatigued by the road before you even reach your destination. The bike carries weight competently — rack mounts are integrated, and the overall build feels substantial without becoming unwieldy.
Around town, the story is equally compelling. Loaded at 25 mph, the bike threads comfortably between variations in pavement quality, curb drops, and sudden direction changes. A wide, stable platform like this makes urban riding less reactive and more intentional — particularly if you're commuting with cargo or sharing paths with pedestrians.
Final Thoughts
Our Honest Verdict
What surprised us most wasn't the specification sheet — it was how this bike rides. Full suspension on fat tire e-bikes can often feel vague or soft, blurring feedback between rider and trail. Here, the tuning is tighter. The bike feels planted and predictable, and that stability builds confidence fast.
The mid-drive motor delivers serious power when you need it — 20 miles per hour comes smoothly, engages the powertrain with authority on demanding hills, and engages intuitively with the rider's cadence. The display is responsive. The brakes are sharp. The overall experience is polished in a way that often costs considerably more.
In short: this bike is more capable and more refined than the price suggests. It delivers far more than we anticipated — and for riders who want real utility, adventure access, and all-terrain capability baked into one platform, it's a genuinely strong choice.