Biktrix Juggernaut Hub Duo Step-Over 2 Review: Long Range for Snow, Sand, and Gravel for $2,299
A well-built fat-tire all-terrain bike with long range and a brake-and-drivetrain package that beats what its $2,299 price usually buys.
The Biktrix Juggernaut Hub Duo Step-Over 2 is built for messy ground. The fat 26x4 tires are happy on snow, sand, loose gravel, and packed dirt, so it's the kind of bike you point at a trailhead or a beach path without stopping to check what's under the wheels. Pair that with a big 910Wh and you can cover real ground before a charger ever crosses your mind.
It's a bike with a , so you can twist and go up to 20 mph without pedaling at all. The 750W delivers its power in one long, even pull, which is a big reason it lands at a Genius Score of 65 out of 100. The build is where it really shines, with brakes and a drivetrain tough enough for the pounding that off-road riding hands out.
Pros & cons
What we like
- The 910Wh is genuinely big for a fat bike, so the claimed 70 miles gives you a real buffer for long backcountry loops.
- 80 Nm of pulls a loaded bike away from a dead stop and up moderate grades without a fight.
- The parts punch above the price: Star Union dual-piston on 180mm rotors and a 9-speed Shimano CUES drivetrain are a step up from what usually shows up here.
- A lets you ride without pedaling, which is welcome for getting a heavy bike moving from a dead stop.
- The 330 lb load rating leaves plenty of room for a bigger rider plus a rack full of gear.
Worth weighing
- Power is the soft spot for its class. This hub motor pulls well from low down but lacks the top-end bite of stronger rivals, and Biktrix doesn't publish a peak wattage, so it can feel taxed on the longest, steepest climbs.
- Value is only okay for the class. A few rivals deliver similar all-terrain range for a little less money.
Key specs
The motor & power
The engine here is a 750W Shengyi rear putting out of continuous power. On flats and rolling ground it builds speed gradually and predictably, which suits long days of exploring more than quick sprints.
Where it earns its keep is , the muscle that gets a heavy, loaded fat bike moving from a standstill and up a moderate grade. A hub motor like this works harder than a on the longest, steepest climbs, so it can feel taxed when the trail really kicks up.
It's a bike, which means a and a 20 mph top speed. You can ride it entirely on the throttle without ever turning the pedals, a real help when you're starting from a dead stop on loose ground. Biktrix doesn't publish a , so judge the motor on that steady 750 rather than a headline burst number.
Range & battery
The 910Wh is the reason this bike can roam so far. Biktrix quotes up to 70 miles, and that's a real cushion for a fat bike, since those big tires normally eat into range just by pushing more rubber down the trail.
The 70-mile figure assumes easy, ideal conditions. Real-world range drops when you rely on the throttle, carry a heavy load, or climb soft ground all day, so plan for something under that on a working ride. Even a cautious estimate still leaves room for a full day out.
Biktrix's product page lists several battery sizes for the Juggernaut line, from 610Wh all the way up to a 1,742Wh dual-battery setup. The Step-Over 2 config here ships with the 910Wh pack, and that's the number we've used for range. If you spot other watt-hour figures, they're different build options, not this bike.
Ride & components
Build quality is the strongest part of this bike, and you feel it in the parts. Braking comes from Star Union dual-piston on 180mm rotors, which is dependable stopping power, and that matters a lot when you're bringing a loaded fat bike down a gravel descent.
Shifting runs through a Shimano CUES 9-speed drivetrain, a newer and tougher group than the entry-level gear you often see at this price. The 26x4 tires are the other half of the go-anywhere story, spreading the bike's weight over snow, sand, and loose gravel that would bog down a skinnier tire.
It carries a 330 lb load, so a larger rider plus a packed rack is no trouble at all. At roughly 86 pounds with the battery installed it's a substantial machine, which is par for the course on a fat bike hauling a battery this size.
Biktrix lists the weight at 72.8 lb, but that's without the battery. Drop the 910Wh pack in and you're closer to 86 lb, so that's the figure to plan around if you'll be lifting it onto a car rack.
Price & value
At $2,299, the Juggernaut Hub Duo asks a fair mid-tier price for a lot of capable hardware. Most of your money is going into the big battery and the quality brakes and drivetrain, and that's exactly where you feel it on the trail.
The value here is decent for what you get. A few rivals match its all-terrain range for a bit less, so this is a smart buy if the durable parts and long battery are what you're after, and less so if you just want the cheapest way onto a fat bike.
Who it's for
The all-surface explorer
If your riding mixes snow, sand, gravel, and dirt trails, this bike is built for exactly that. The fat 26x4 tires and big battery mean you can chase rough ground for most of a day without watching the range meter.
The twist-and-go rider
If you like the option to stop pedaling and just cruise, the carries you to 20 mph on power alone. That's genuinely useful when you'd rather coast than pedal on a long day out, or when you need to keep a heavy bike moving through slow, sketchy going.
The steep-climb charger
If your local trails are all short, punchy, technical climbs, know that this pulls steadily but won't launch you up a steep wall the way a can. It'll still get you up most grades, just at a more measured pace when the pitch turns nasty.
The smooth-pavement commuter
If you mostly ride paved roads and run short errands, the fat 26x4 tires and heavy-duty all-terrain build are more bike than you need. A lighter city e-bike would give you an easier, cheaper ride without all the off-road hardware you'd never use.
Frequently asked
Does the Biktrix Juggernaut Hub Duo Step-Over 2 have a throttle?
Yes. It's a bike with a , so you can ride it up to 20 mph on motor power alone, without ever turning the pedals.
How far can the Biktrix Juggernaut Hub Duo Step-Over 2 go on a charge?
Biktrix claims up to 70 miles from its 910Wh , though real-world range runs lower once you factor in throttle use, heavy loads, and long climbs on soft ground.
What size tires does the Biktrix Juggernaut Hub Duo Step-Over 2 have?
It rolls on 26x4 fat tires, which are what let it handle snow, sand, and loose gravel that would stop a skinnier tire.
What kind of motor does the Biktrix Juggernaut Hub Duo Step-Over 2 have?
A 750W Shengyi geared rear with 80 Nm of . Biktrix doesn't publish a peak wattage, so plan around that steady 750.
How much does the Biktrix Juggernaut Hub Duo Step-Over 2 weigh?
Biktrix lists 72.8 lb without the battery. With the 910Wh pack installed it's closer to 86 lb.
What class is the Biktrix Juggernaut Hub Duo Step-Over 2?
It's a Class 2 e-bike: throttle plus a 20 mph top speed. Class 2 bikes are generally allowed on roads, bike lanes, and many shared-use paths, but some natural-surface trails and parks restrict throttle bikes, so check your local rules before riding off-pavement.
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Read the reviewHow we score: the Genius Score blends a bike's capability against same-price peers with its value for the money, weighted for what this off-road buyer prioritises. Specs are pulled from the manufacturer's live page and normalised (nominal vs peak watts, true weight with battery). Ratings are our estimate from specs, not a lab test.