Biktrix Juggernaut Ultra Duo 4 Step-Over Fat Tire Electric Bike
- Class 2
- 801-1,000 Wh
- Over 80 mi claimed
- 351-400 lb max load
SVT Score, Lower
A 160 Nm mid-drive fat tire e-bike with a 910 Wh battery, a 380 lb load rating and a fitted rack, at over 85 lb with its battery.
$3,499
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Usability
5.9 out of 10- Option: range extender 52 V, 17 Ah, 884 Wh, $649.00
- Rating: 1,000 W nominal; sold limited to 20 mph and 500 W, no-limit option for off-road use
- Tester: ElectricBikeReview.com, a manufacturer-paid review, weighed it at 94.21 lb (Sep 2024)
Better on weightAventon Aventure M Fat Tire EbikeAt 73 lb it is lighter than most fat-tire bikes. $2,899Scores 6.0- Searched: UL Certipedia Intertek SGS TÜV SÜD CPSC Health Canada
- Record: UL Product iQ, ANSI/CAN/UL 2849 drive system (QGNS2, Electrical Systems for E-Bikes - Component), MM G510.1000.C (controller CR R10M.1000.FC) = Bafang M620 Ultra, Bafang Electric
Better on verificationPuckipuppy GoldenR Pro Dual-Motor E-Bike$1,999.99Scores 6.0
- Option: Powder Coated $3,849.00; Step-Thru $2,982.00
Strengths
- Strong hill-climbing torque
- Rack and fenders come fitted
- Big battery for long rides
- Wheel options at one price
- High load rating for rider and cargo
Drawbacks
- Heavy to lift
- Warranty void if motor settings change
- No UL safety listing found
- Owner reports slow warranty repairs
- Motor power above the usual street limit
A powerful fat tire hauler with a high load rating, but very heavy
Specs
- TypeFat Tire
- E-Bike ClassClass 2
- Battery801-1,000 Wh
- MotorMid-drive
- Top SpeedUp to 20 mph
- Claimed RangeOver 80 mi
- WeightOver 85 lb
- Max Rider Load351-400 lb
- BrakesHydraulic disc
- SuspensionFront
- FoldingDoes not fold
- CertificationsNone verifiable
- Warranty2 Years
At a glance
- Shimano Alivio 9-speed
- Medium and large frames
- Thumb throttle
The BIKTRIX US trademark is registered to Biktrix Enterprises Inc. of Saskatoon, Saskatchewan, which receives legal notices under the US terms.
- Biktrix e-bikes are sold in the US by Biktrix USA Inc., a Delaware corporation operating as Biktrix Electric Bikes.
- The bikes are sold through biktrix.com in US dollars and ship to the US by FedEx from Saskatoon, free on orders over $1,000.
- The e-bikes it sells run from a 350 W step-thru commuter to carbon full-suspension fat bikes.
- None of Walmart, Best Buy, Target, Costco, Dick's Sporting Goods, REI, Home Depot and Lowe's sells Biktrix e-bikes, either as the seller or through a marketplace listing; Biktrix sells its e-bikes through its own store (October 2026).
The Biktrix Juggernaut Ultra Duo 4 Step-Over is a fat tire e-bike with a Bafang Ultra M620 mid-drive rated 1,000 W and 160 Nm, and a 52 V, 17.5 Ah internal battery of 910 Wh.
It has dual-piston hydraulic disc brakes with 180 mm rotors, a 75 mm RST Guide spring fork with lockout, torque and cadence sensors and Chaoyang 26x4 tires, with 27.5x3 tires at the same price. Biktrix lists 75 lb without the battery and a 380 lb load rating, in medium and large frames.
It has a DPC-18 colour display, integrated headlight and taillight, a thumb throttle, a rack and fenders. The listing sells it limited to 20 mph and 500 W, with a no-limit option offered for off-road use or private land. The Powder Coated finish is $3,849.00 and a 52 V, 17 Ah (884 Wh) range extender battery is $649.00.
The Ultra Duo 4 Step-Thru sells at $2,982.00 with four-piston brakes, a 330 lb load rating and 73.9 to 75 lb without battery. A one-off Horizon Juggernaut Ultra Duo 4 19 in build is listed at $3,499.00.
Compared in
Questions answered from our data
How much does an electric bike cost?The 245 electric bikes we list run from $799 to $12,500, with a median of $1,995.
Are electric bikes UL certified?88 of the 245 electric bikes we list carry a UL 2849 listing we could look up by model.
How far can an electric bike go?209 of the 245 electric bikes we list claim 41 miles or more on a charge, each on its maker's own basis.
Which electric bikes have a battery over 1,000 Wh?14 of the 245 electric bikes we list have a battery over 1,000 Wh, as their makers rate it.
