Diamondback El Oso Dos (2018)


SKU 02-0210480

The fastest human alive topped out at 27 miles per hour. Fastest bear? 35 miles per hour. The takeaway? Bears are fast; particularly this bear, el Oso Dos. We made this bike quick by equipping it with a light, strong double-butted aluminum frame and sleek alloy air-formed fork. We specifically designed el Oso Dos around a rigid platform to shave pounds and let the gigantic tires take care of the suspension — something they do quite well.


  • Fast, sleek … el Oso Dos is also an out-and-out fat bike, and that means you can ride this bike up and over just about anything and under any conditions.
  • The 6061-T6 aluminum frame/fork with hydroformed tubes packs a punch without also packing extra weight. A rear thru-axle adds stiffness
  • Twenty reliable gears to scale any terrain, courtesy of Shimano
  • Powerful TRP Spyke disc brakes provide control in all conditions
  • DB El Oso Custom air formed alloy fork rides as well as it looks. It’s also plenty stiff, thanks to its 15mm thru-axle
  • 26x 4.5" tires are wide enough to take you places other bikes fear to tread


El Oso 6061-T6 Double Butted Aluminum, Formed Top / Down Tube, 1.5" Tapered Machined Headtube, 197mm Thru Axle, Fits up to 26x5" Tire


DB El Oso Custom Rigid Air Formed Alloy Fork, 1.5 Taper Steerer, 150mmx15mm Thru-axle


FSA No.57, Sealed Cartridge


FSA Comet Mega Exo, 36/24T

Bottom Bracket

FSA Mega Exo

Front Derailleur

Shimano Deore M6020, Side Swing, Front Pull, Direct Mount

Rear Derailleur

Shimano Deore M6000 Shadow Plus, 10 Speed


Shimano Deore M6000, 10 Speed


Shimano HG500, 10 Speed, 11-42T


KMC X10, 10 Speed, EPT Anti-Rust

Front Hub

32h Alloy, Sealed Cartridge Bearing, 150mmx15mm Thru-axle

Rear Hub

32h Alloy, Sealed Cartridge Bearing, 197mmx12mm Thru-axle, Cassette


14g Stainless Steel


Diamondback 95mm Wide w/50mm Cutouts, 32h Alloy Singlewall


Kenda Juggernaut 26x4.5"


TRP Spyke Dual Piston Mechanical Disc, w/ 160mm Front and Rear Rotors

Brake Levers

TRP ML800 Spyke


DB4L Alloy Platform w/ Replaceable Pins


Diamondback, 740mm Wide, 15mm Rise, 31.8 Bar Bore


DB High Density Foam Grip


DB 3D Forged, 7° Rise, 31.8 Bar Bore


DB Race M-series Saddle


DB Alloy Micro Adjust, 30.9mm


Owner’s Manual, Assembly Guide, DB Shock Pump, Tubeless Valves, DB Torque Wrench w/ 3mm/ 4mm/ 5mm/ T25 Hex Bits, Diamondback Mud Guard, Extra Derailleur Hanger