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All Terrain Ultra FS

$ 3,799.00 – $ 4,199.00

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Estimated to ship [19041994]
$ 3,999.00 $ 3,799.00
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The M2S Bikes All Terrain Ultra FS is one of the most powerful electric fat bikes on the market. The mid drive motor provides up to 1500 watts of power to help riders conquer the steepest hills while enjoying a comfortable ride thanks to the 4.5" fat tires that offer incredible traction and a soft ride on all types of terrain. The full suspension fat bike design provides riders with a combination of massive power, fast top speed and a durable frame to make this the ultimate fat bike that's ready to take on the most rugged off road terrain while still being king of the city streets thanks to the high speed powerful motor.


Bafang Ultra Mid Drive Motor

With a maximum torque of 160Nm and 750 or even 1000W rated power output, the M620 will definitely get the heaviest loads accelerated on even the steepest incline thanks to the 160Nm of max torque. Due to the system's dual sensor design, the rider has full control at all times and enjoys extremely sensitive responsiveness.

Bafang TFF / DC 18 Full Color Display

The DC18 digital display from Bafang features 5 levels of assist with your choice of either Sport or Eco mode. In addition to the easy to read assist selection, the display also provides key insights into estimated remaining range, current speed, max speed, motor watt output and more.

Shimano Deore 10-Speed Drivetrain 

The Shimano Deore 10-speed drivetrain is the model of choice across various disciplines including XC, all-mountain and enduro. This high performance drivetrain is ideally suited for the Ultra motor and provides a wide-range of gearing to maximize the motor's torque for steep hill climbing ability and fast top speeds. We choose this drivetrain for it's strong, reliable and quick shifting.

Tektro E-Comp Hydraulic Disc Brakes 

The Tektro Auriga E-Comp hydraulic brakes provide rapid stopping power thanks to the 180mm rotors paired with hydraulic calipers. These easily adjustable brakes are chosen for their reliability and performance. While they rarely need servicing, when they do they can be easily serviced by most bike shops to bleed the hydraulic fluid and replace the pads as needed.

Mozo Air Sprung Suspension Fork 

The Mozo air sprung suspension provides 100 mm of suspension travel to help soften the ride and provide better performance off road. The fork features a lockout lever to allow quick adjustments during a ride to stiffen or soften your fork, while more fine tuning can be performed by using the air adjustment valve with a high pressure shock pump to dial in the performance for your weight and riding style.

Full Suspension Design With Rear Shock

Our All Terrain Ultra FS features our proprietary frame design utilizing an alloy four bar linkage full suspension frame design with sealed cartridge bearings and oversized pivots for superior performance off road. The rugged and durable design was upgraded in 2021 to provide better performance and reliability and updated in 2022 to include an updated coil shock with reservoir and rebound adjustment to improve performance by easily adjusting the suspension characteristics mid-ride in incremental steps to dial in the feel of your rear shock.


Kenda Juggernaut Tires 

The 4.5" Kenda Juggernaut Sport fat bike tires provide great off road performance. Featuring a wire bead, 60 TPI construction and durable treads, these tires are among the best tires available in the fat tire category. They can be aired down for better grip and a softer ride off road, while fully inflating them to 30 psi provides a fast rolling experience on hard packed surfaces and paved streets.


Other Features 
The All Terrain Ultra FS also features a wired LED front light and battery powered rear light. Other features include Selle Royale saddle, Promax stem and seatpost, 12mm rear thru axle, quick release front axle and two USB ports.

Bike Components & Parts


  • FRAME: Proprietary All Terrain 6061 Aluminum Frame developed by M2S Bikes
  • SUSPENSION: Alloy Four Bar Linkage Full Suspension Frame with Sealed Cartridge Bearings and Oversized Pivots
  • FORK: 100mm Air Dampened Fork / Rebound Adjustment / Lockout
  • REAR SHOCK: KKE BA-27RC Factory Series Rear Coil shock with Remote Reservoir and compression and rebound adjustments
  • SIZING: Medium 17" seat post tube / Large 19" seat post tube


  • CRANKSET: Bafang Ultra crankset with integrated chainguards / 44t chainwheel
  • DERAILLEUR: Shimano Deore 10-speed
  • SHIFTER REAR: Shimano Deore trigger shift
  • CHAIN: KMC 10-speed


  • RIMS: 84mm wide alloy drilled rims with 12 gauge spokes
  • HUBS: Sealed Quando Fat bike hub set
  • TIRES:  26" x 4.5"
  • AXLES: 135mm quick release in front; 12mm thru axle in rear
  • BRAKES: Tektro Auriga Hydraulic Disc E-Comp, 180mm front; 180mm rear
  • HANDLEBAR: Alloy riser 27.5" wide handlebar
  • GRIPS: Lock on grips
  • STEM: standard aluminum
  • SEATPOST: standard aluminum alloy
  • SADDLE: Selle Royal Lookin Gel Saddle


  • MOTOR:  Bafang Ultra Mid Drive
  • BATTERY: 48v, 19.2 amp hour with Reention Dorado case
  • CONTROLLER: integrated Bafang Ultra controller
  • DISPLAY: Bafang DPC 18 full color display
  • THROTTLE: left hand thumb throttle
  • SENSORS:  integrated torque & cadence sensor
  • LIGHT: High Powered LED - wired to main battery


  • RANGE: 10-45 miles per charge depending on motor settings
  • TORQUE: 160 Newton Meters
  • WEIGHT: ~85 pounds
  • WARRANTY: 1-year comprehensive

All Terrain Ultra FS Overview Video


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    All Terrain Ultra FS

    Large / 19.2 Amp Hour
    Large / 19.2 Amp Hour
    $ 3,999.00 $ 3,799.00