Eunorau Defender-S Dual 750W Motor Fat Tire Electric Bike

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Forest Cobra

Dual 750W Bafang Motor 48V/14Ah Fat Tire Electric Bike

Downtube-Integrated Battery w/ Samsung Cells (Additional Dual Battery Optional)

Front and Rear Hydraulic Disc Bakes w/ Auto Motor Cutoffs

9-Speed Shimano Alivio Drivetrain

5-Level Pedal Assist System w/ Thumb Throttle

Kenda 26" x 4.0" Fat Tires w/ K-Shield Protection


eunorau bikes authorized dealer logo for really good ebikes

Introducing the Defender-S Fat Tire Electric Bike

Are you looking for an incredible off-road riding beast? Check out the 2021 Defender-S from Eunorau (pronounced U-Nor-O). The Defender-S is a high-end electric mountain bike featuring premium components throughout and some truly innovative ebike technology. It has been designed for the most rugged outdoor riding conditions, with an aircraft-grade 6061 aluminum alloy frame with full suspension, Dual 750W motors, and a long-range battery with second (dual) battery upgrade options, 17" and 19" frame sizes. With a top speed of up to 30 mph, the Defender-S is simply amazing!

Electric Bike Report: Defender-S Review

Electric Bike Report is an independent and authoritative reviewer of electric bikes, and it's good to see what they say and watch their videos before making this important decision. 

It's worth reading the full review, but to sum up their thoughts on the Defender-S, check out their handy Pros and Cons chart.

eunorau defender-s ebike pros and cons


Defender-S Description

If you need an electric mountain bike with incredible hill-climbing and towing capabilities, the Defender-S is for you. This model features dual 750W motors.

The heavy-duty full-suspension Defender-S frame is handcrafted from 6061 aluminum alloy, giving the bike incredible strength. It is offered in 17" and 19" frame sizes, so even riders as short as 5'-5" can enjoy riding the Defender-S. The frame is offered in stunning matte black and gorgeous grey finishes. 

The suspension components on the Defender-S include the RST Guide suspension fork, which offers 75mm of travel and mechanical lockouts; and the DNM A0-42RC rear absorber, which feature a dark hard-anodized AL-7075 ∅10 mm ( 0.39”) damper shaft, adjustments for rebound, lockout and high pressure, and delivers up to 190mm of travel. Cables are threaded through the frame for a clean design. The battery is integrated into the downtube portion of the frame, with the option for a second battery added on top of the downtube.


The Defender-S has 5 levels of pedal assist, allowing you to finely adjust how much power the motor puts out. It also features a thumb throttle, which allows for riding without pedaling (very stealthy). The Defender-S also features a 9-speed Shimano Alivio derailleur, providing smooth, reliable and fast shifting action, the elimination of unwanted chain movement and an end to ghost shifting.

The 48V/14Ah battery on the Defender-S is located within the downtube, providing an added level of stealth and aerodynamics to the frame. This battery, which is packed with Samsung cells, can be upgraded to 48V/17Ah. And if you really want to extend the range of your ride, there is an option to buy a second battery with 48V/14Ah or 48V/17Ah specs, which mounts on top of the downtube. The controller adjusts the draw from each battery automatically based on voltage and demand. The range these batteries are capable of achieving will vary based on a number of significant factors, including terrain, load, and demand. Please use our Ebike Range Calculator to estimate your expected range per charge.

defender-s ebike handlebar controls

The Defender-S is a very capable fat tire electric hunting bike, designed especially for natural trails and rugged off-road terrain. You will appreciate the highly responsive speed sensor, that will make slow technical riding feel natural and intuitive. This electric mountain bike is sure to be a favorite of hunters, allowing you to travel great distances to follow game, monitor cameras, and visit remote watering spots. The Kenda 26” x 4” fat tires were designed for use with bikes and feature dense 30 TPI casings, wire beads and K-Shield protection.

Kenda's first line of defense since 1995: a layer of light, flexible rubber containing aramid and ceramic particles inside the tire, under the tread area only. This has been designed to prevent punctures and increase tire life.


eunorau defender-s ebike

These tires will provide excellent traction and stability on uneven and gravely surfaces, and can be ridden on snow and sand. For a wider footprint, you can deflate the tires down to 5 psi, or pump them up to 30 psi when you ride on paved surfaces and want a more responsive feel and performance.

When it comes to stopping with authority, the Defender-S does not disappoint. It features a hydraulic brake system with 180mm stainless steel rotors front and rear, and automatic brake/motor cutoff sensors, so you will never risk motor acceleration during braking.

Electric bikes are an excellent form of transportation, even a highly specialized ebike like the Defender-S. They can be ridden in bike lanes and other areas where cars are prohibited; they have zero emissions and are therefore a greener, ecologically-friendly alternative to cars.

Eunorau Defender-S Specifications

  • MOTOR: Dual 750W Bafang Motors
  • BATTERY TYPE: 48V/14Ah Samsung Lithium-Ion Battery + Optional Second Battery (Dual Battery Design)
  • BATTERY CHARGING TIME: 4 - 6 hours
  • FRAME: Aluminum Alloy 6061 Full Suspension
  • FORK: RST Guide 75mm Travel
  • SHOCK: DNM A0-42RC,165mm
  • THROTTLE: Thumb Throttle
  • DISPLAY: New C3 Colorful Display (View Display Manual)
  • LIGHTS:  Integrated Front LED Headlight and Taillight
  • RIMS: 26-inch Black Alloy
  • SPOKES: Stainless Steel
  • TIRES: Kenda 26" x 4.0" Tires with K-Shield Protection (Tire model may vary due to supply shortages)
  • GEARS: 9-Speed Shimano Alivio Drivetrain
  • SPROCKET: 44T Aluminum Chain Wheel With Protection
  • BRAKES: Dual Hydraulic Disc Brakes w/ 180mm Rotors & Auto Motor Cut-Off Sensors
  • BRAZONS: Attachment Points for Rear Rack & Fenders
  • HANDLEBAR: Adjustable Stem for Comfort - Matte Black
  • PEDALS: High-Quality Nylon Pedals
  • BIKE WEIGHT: 84 Lbs.
  • BOX DIMENSIONS & WEIGHT: 66.9" x 12.7" x 33.4" (106 Lbs.)
  • MAX SPEED: 30 Mph
  • MANUAL: Included
  • ASSEMBLY: The Defender-S comes mostly assembled. Final assembly includes attachment of the pedals, handlebar, front wheel and light.
  • TOOLS: Tools for Final Assembly Included
  • SHIPPING: Free shipping to the lower 48. We are unable to ship this brand to Alaska or Canada at this time. For shipments to Hawaii,please send us your shipping address and the products you want, and we will find the best rate available.

Eunorau Ebike User Manual

Electrek Defender Review

We are always grateful when Micah Toll at Electrek reviews one of the ebikes we carry. He is an independent authority in the field of electric bikes, and we value his opinion. His review of the Eunorau Defender is worth reading and watching.



Orders for in-stock items take 24-48 hours to process, then about 5-7 days in transit. Delays due to Covid have occurred. If an item is on backorder, the estimated ship date will be shown below the Pre-Order Button.

All products are shipped free within the Contiguous US via UPS, FedEx or similar carrier. Shipping to AK, HI and PR may incur additional charges.

If your package appears damaged from shipping, please do not accept it. Tell the driver to keep the package and contact us immediately at 888-883-3350. We offerGuide Package Protectionto ensure against lost, stolen or damaged goods. Click here to learn more about Guide.

Returns for buyer’s remorse are typically not accepted by our suppliers, and if accepted, the customer may incur shipping and restocking fees.

Please click here to read our entire Shipping & Returns Policy.


Ask a Question
  • Hello.. Do you ship to europe and what might it cost?

    I'm sorry, but we do not ship directly to Europe. If you were to arrange your own freight forwarding, we could ship free to any service in the US. However, you would have to coordinate this service yourself.

  • is the optional 2nd battery to be used on board at the same time or is it for carry on swap type ?

    It can be used at the same time. The controller adjusts the draw from each battery automatically based on voltage and demand.