Biktrix Juggernaut Ultra Eagle 2 Review: 160 Nm of Climbing Torque for $4,999
The Biktrix Juggernaut Ultra Eagle 2 pairs a powerful Bafang Ultra mid-drive with a throttle and switchable class, so long as you can accept a premium price and shorter range than rivals.
The Biktrix Juggernaut Ultra Eagle 2 is built for the kind of riding that flattens lesser e-bikes: long, steep climbs with you and a full load on board. The heart of it is a Bafang Ultra motor putting out , the kind of pulling force that drags a loaded bike up a rough grade without bogging down. That's the main reason to pay premium money for this thing.
You also get a and a switchable class, so you can ride without pedaling and set the top speed to match local rules. The catch shows up in range and price. The is big, but this bike covers less ground per charge than similarly priced rivals, and at $4,999 you're paying for the muscle more than the mileage. Its Genius Score of 64 captures that split: serious capability, ordinary value.
Pros & cons
What we like
- The Bafang Ultra delivers , enough grunt to haul you and your gear up steep, technical climbs.
- Genuinely powerful, with and on tap for the moments a climb gets nasty.
- A plus a switchable setup lets you cruise without pedaling and dial the top speed to wherever you're riding.
- Light for a bike this capable at around 60 pounds, so it's easier to lift onto a rack than most premium off-road rigs.
- The standard is generous, and Biktrix offers larger packs if you want more.
Worth weighing
- Range trails the competition. Even with the big battery, this off-road build covers fewer miles per charge than similarly priced rivals, so big days need planning.
- It's a lot of money. At $4,999 you're paying a premium for the Bafang Ultra torque, and the overall value is ordinary for the class.
Key specs
The motor & power
The motor is the whole story here. Biktrix builds this bike around the Bafang Ultra , one of the strongest motors you'll find on a production e-bike. On steep, loaded ground it pulls away from a comparable hub-motor bike.
The number that matters is . It's what lets the bike drag you and a heavy load up a loose, steep trail without grinding down to a crawl.
On paper it's with for short bursts. The peak only turns up for a few seconds when you really demand it, so judge the bike on that steady 1,000W. That alone is more than enough to make short work of most hills.
Range & battery
The standard is a good-sized pack, and it needs to be, because this motor draws a lot when it's working hard.
Biktrix quotes up to 55 miles. Treat that as a best-case figure and plan real rides around less, since hard climbing, a loaded bike, and throttle time all pull the number down. Against similarly priced off-road bikes, this one gets fewer miles from a charge, which is worth weighing if long days are your norm.
Biktrix lists a few battery sizes for this bike, and the page can make that confusing. The default here is the 52V 910Wh pack, and you can step up to a 48V 1,008Wh or 52V 1,200Wh option for more range. We quote the 910Wh figure because that's what ships standard, so if long days out are your thing, budget for the upgrade up front.
Ride & components
The base bike rolls on 27.5 x 3-inch tires, a middle-ground size that's happy on pavement and groomed trails. Biktrix also offers wider 26 x 4 and 26 x 4.8-inch fat setups if you want more float in sand or snow.
Stopping power comes from IIIPro E500 quad-piston on big 203mm rotors, which is serious hardware for hauling a loaded bike down a steep descent.
Shifting runs through an 11-speed SRAM NX drivetrain, a durable mid-tier setup that gives you a wide gear range for climbing. The frame is rated to carry up to 330 pounds, so there's plenty of headroom for a bigger rider plus gear or a hauling load.
This is one bike you reconfigure, not three separate models. In the display you can switch between . In its Class 2 setting the is live and assist tops out at 20 mph, which is usually what keeps it legal on multi-use paths and trails. Bump it up to Class 3 and runs up to 28 mph for road and bike-lane riding. Set it to match where you actually ride.
Price & value
At $4,999 this is firmly premium territory, and most of that money is going into the motor and the heavy-duty build rather than into flashy extras.
Value is where it comes back down to earth. You're paying specifically for that Bafang Ultra torque, so the math works if big-mountain climbing power is the whole point of your purchase. If you just want a capable trail bike, you can spend less elsewhere.
Who it's for
The steep-country climber
If your rides mean long, punishing climbs with a loaded bike, this is exactly where the and its 160 Nm earn their keep, pulling you up grades where a weaker motor would bog down.
The rider who likes resting their legs
If you want the option of not pedaling, the gets you moving and cruising on motor power alone, and the switchable class lets you keep it path-legal at 20 mph or open it up to 28 on the road.
The all-day backcountry rider
If you're planning big days far from an outlet, the standard 910Wh battery may not stretch as far as you'd like on hard terrain. Look at the larger battery options before you commit.
The value-first shopper
If you want the most bike per dollar, look hard at the price. At $4,999 the money buys climbing muscle above all, so if you don't need this much torque, you can spend less elsewhere.
Frequently asked
Does the Biktrix Juggernaut Ultra Eagle 2 have a throttle?
Yes. It has a , so you can pull away and ride without pedaling, which is genuinely handy for getting a loaded bike moving on a steep climb.
Can you ride the Biktrix Juggernaut Ultra Eagle 2 without pedaling?
Yes, in its Class 2 setting the throttle is active and you can ride up to 20 mph without pedaling. Riding on the throttle draws more power, so your range will come in shorter than if you pedal along.
Can you change the class on the Biktrix Juggernaut Ultra Eagle 2?
Yes. You switch between in the display. Class 2 keeps the throttle live and caps assist at 20 mph, which is usually the path-legal setting, while Class 3 raises to 28 mph for road and bike-lane riding.
How fast does the Biktrix Juggernaut Ultra Eagle 2 go?
It depends on the setting. In Class 2 mode assist tops out at 20 mph; switch it to Class 3 and it runs up to 28 mph.
How far does the Biktrix Juggernaut Ultra Eagle 2 go on a charge?
Biktrix claims up to 55 miles on the standard 910Wh battery. Plan on less in real riding, especially on hard climbs or with heavy throttle use, and note that larger battery options are available if you need more range.
What size motor does the Biktrix Juggernaut Ultra Eagle 2 have?
A 1,000W Bafang Ultra with 1,500W of peak power and 160 Nm of , a genuinely powerful setup for serious climbing.
How much does the Biktrix Juggernaut Ultra Eagle 2 weigh?
About 60 pounds, which is light for a motor and build this powerful.
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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.