
Juggernaut Ultra Beast
$4,799
MSRP
The Juggernaut Ultra Beast is a maximalist fat bike — a 160 Nm mid-drive and 1440Wh battery for riders who want range and grunt over everything else.
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Full specifications
- MSRP
- $4,799
- Category
- Fat Tire
- Class
- Class 3
- Top Speed
- 28 mph
- Motor
- Bafang M620 Ultra mid-drive (Mid-drive)
- Motor Power
- 1000W nominal / 1500W peak
- Torque
- 160 Nm
- Battery
- 1440Wh, 52V Li-Ion Samsung
- Range
- up to 80 miles
- Weight
- 80 lbs
- Frame
- 6061 Aluminum
- Brakes
- Hydraulic 4-piston disc
- Drivetrain
- Shimano 11-speed
- Suspension
- Front, air
- Tires
- 26×4.8"
- Max Payload
- 350 lbs
- Warranty
- 2 yr
What we love
- 1440Wh of battery for huge range
- Bafang Ultra mid-drive torque
- Highly configurable at order
What we'd change
- Very heavy and powerful — respect the speed
- Premium price and long build times
Our verdict
By Sean Lupton · May 28, 2026 · Scored 8.3/10 against how we test
The Juggernaut Ultra Beast is a maximalist fat bike for riders who want range and grunt above all else, and who like to configure a build to order. A 160 Nm Bafang Ultra mid-drive paired with a 1440Wh battery is overkill for the average commuter — this is for long backcountry days and heavy riders. Anyone wanting a manageable, everyday bike should walk away; at 80 lb and Class 3 speed it demands respect.
The 8.3 is driven by motor-and-power-delivery and real-world range: the Ultra mid-drive climbs anything, and that enormous 52V Samsung pack backs the 80-mile claim even with the power on. Four-piston hydraulics and an 11-speed drivetrain support brakes-and-safety and build. It loses ground on value and everyday usability — the premium price, long build times, and sheer 80 lb mass make it a specialist's bike, not an all-rounder.
The compromise you accept is weight, cost, and lead time in exchange for essentially uncompromised range-and-torque. For the right rider that's the whole point. If you want the same Ultra motor for less and don't need the giant battery, the Bakcou Mule is the alternative — cheaper and lighter, but with far shorter range once you lean on the power.
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