Due to rising minimum order quantities, we have had to discontinue the Behemoth.  It is a great bike but it is a niche bike within a niche market and it is our most expensive bike.  As of now, we are planning on bringing in a Samson frame with larger tires in the future to meet the demand for a fat tire Day 6 but that is down the road.  Thanks for understanding.


Contact your local Day 6 Dealer or give us a call to order the BEHEMOTH.

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Hub Motor versus Bafang Mid Drive
You can find volumes of information online about the differences between the two types of motors.  In my humble opinion, the mid drive (MD) is like a Porsche and the hub motor (HM) is like a Toyota.  The MD utilizes the gearing of the bike so you can climb and go fast.  When you shift down, you pedal faster and the motor spins faster; just like your car.  You and the MD are working together.  If you break the chain on a MD, you can’t move.  The flipside to the MD – because it uses the gearing of the bike – is when a rider doesn’t shift through the gears like they should, it lugs the motor down (electric motors like to spin fast) and can burn out the controller.  If you keep your cadence up and use the gears, the MD is golden.  If you want to be lazy and ride it like a motorcycle, you will be in the repair shop.  I have ridden MDs for 8 years and have never burned up a controller.  I am also 175 pounds and in good shape.  Heavy riders must pedal and shift through the gears.
One advantage of the HM is its reliability.  (like a Toyota)  You can abuse them and they will keep on running.  They are quieter than the MD.  If you break the chain when using a HM, you can still move because the wheel is driven by the motor laced into it versus being driven by the chain like the MD.  The HM is like having a car stuck in 3rd gear.  The way it moves faster is to give it more juice.  The Crystalyte motor we use comes with a 3 year warranty and it has extra features that help it run better in the heat.  The HM does not take advantage of the gearing of the bike like the MD so it is not as efficient but that is offset by the fact that the HM allows you to keep all 24 gears.
If you want more of a biking experience and shift through the gears, the MD is probably the way to go.  If you want more stealth and reliability, then the HM is probably the way to go.  Like chocolate and vanilla, they both have their advantages and disadvantages.


  • Battery attaches/locks to down tube with key
  • 750HD Bafang Heavy Duty mid drive with 1 year warranty  or 750W High Performance rear hub motor with 3 year warranty
  • 17.5Ah lithium ion battery
  • Tires: Vee Rubber Mission Command 24×4.0
  • Rims:  Alloy Double Wall 36 Spoke
  • Spokes: 12 Gauge Stainless
  • Brakes: Tektro Novela Disc, 180 mm, Front and Rear
  • Headset: Neco standard bearings
  • Chain: KMC rust buster
  • Stem: UNO, alloy, adjustable, 90mm
  • Speeds: 8
  • Derailleur: Shimano Deore
  • Shifter: Shimano Acera Trigger
  • Seat Post Clamp: Double Bolts
  • Seat Post: 30.4 mm with Double Bolts


  • Weight Capacity:  350 Pounds
  • Weight: 64 pounds
  • Wheelbase: 54″

Frame Sizes:

  • Small: Fits People from Approximately 5’1 to 5’9 (up to 30″ inseam)
  • Large: Fits People from Approximately 5’7 to 6’3 (28″ inseam – 33″ inseam)
  • Extra Large: Fits People from Approximately 6’2 to 6’9 (32″ inseam – 36″ inseam)
  • All sizes approximate as everyone is different.
  • It is always best to test ride before buying if possible.
  • There should never be more than 5″ of seat post showing between top of collar and bottom of horizontal backrest tube.  See example here.


  • Black Scale – BK
  • Blue Scale – BL


    • B24S-BK    Black Scale (SOLD OUT)
    • B24S-BL     Blue Scale (SOLD OUT)
    • B24L-BK     Black Scale
    • B24L-BL      Blue Scale
    • B24XL-BK    Black Scale (SOLD OUT)
    • B24XL-BL    Blue Scale (SOLD OUT)

The following parts are proprietary and custom designed by Day 6.

  • 16″ Contour Seat with dual density memory foam OR 13″ Sport Seat to more easily reach the ground and pedals
  • Contoured Ergo S’port Backrest with lumbar support fits perfectly
  • EZ Reach Handlebars eliminate leaning forward
  • U First Frame provides easy exit and entry and relaxed sitting