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Diamondback El Oso De Acero Complete Fat Bike - 2016


Item # DMB0031

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  • White, S ($800.00)
  • White, M ($800.00)
  • White, L ($800.00)
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Item # DMB0031


When the temperature drops and the snow clouds roll in to cover the landscape with a down comforter of fluffy powder, all we want to do is set aside the computer and break out a fat bike for burly fun in the snow. The 2016 Diamondback El Oso De Acero Complete Fat Bike lives for those snowbound days with the classic, clean lines of steel tubing and tank-like tires that are ready to blast across the snowpack in search of winter adventure.

The El Oso De Acero's frame is made from butted, heat-treated steel, which is durable enough to weather winter abuse but nimble enough to take on challenging trails. Shimano's Alivio drivetrain provides a wide range of gear ratios to use as you navigate slick mud and deep snow, while Tektro Mira mechanical disc brakes promise consistent, reliable stopping power when you need it.

Diamondback caps off the De Acero with extra-wide rims and Chaoyang Cruiser tires. Measuring a beefy four inches in width, these knobby rubber platforms absorb bumps and float effortlessly across snow-covered terrain in conditions that would be considered hazardous for road bikes or even most mountain bikes.

Tech Specs

Frame Material:
DB El Oso Custom Rigid Steel
1-1/8 in Aheadset
Shimano Alivio M4000 9-speed
Front Derailleur:
Shimano Alivio M410 E-Type
Rear Derailleur:
Shimano Alivio M4000
40/30/22 t Shimano Acera M3000
Bottom Bracket:
Sealed Cartridge
12 - 36 t Shimano HG300 9-speed
KMC X9 EPT Anti-Rust
Tektro Mira Mechanical Disc
Brake Type:
mechanical disc
160 / 160 mm Tektro
DB Pro Bar, 31.8mm
Handlebar Rise:
15 mm
Handlebar Width:
740 mm
DB High Density Foam
DB 3D Forged, +/-7deg rise 31.8
DB Race M-series w/ cromo rails
DB Alloy 27.2mm
[rims] DB 75mm Wide w/ 28mm cutout, singlewall 32h
[front] Alloy 32h Disc, 3/8-inch Nutted 135mm, [rear] Alloy 32h Disc, Cassette, 3/8-inch Nutted 135mm
Chaoyang Cruiser
Tire Size:
26 x 4.0 in
not included
owner's manual, chainstay protector, clear coat, H2O bottle mounts
Recommended Use:
snow and sand
Manufacturer Warranty:
lifetime on frame

sizing chart

Bike size by rider height


Geometry chart


Geometry Chart


El Oso

Seat Tube


Effective Top Tube






Stand Over

Head Tube


Head Tube Angle


Seat Tube Angle


Bottom Bracket Drop




S 15.7in 22.8in 23.6in 16.1in 31in 4.3in 68.5o 74o 2.4in 18.1in
M 18in 24in 24in 17.1in 31.6in 4.7in 68.5o 74o 2.4in 18.1in
L 19.7in 24.8in 24in 17.9in 32.3in 4.7in 68.5o 74o 2.4in 18.1in

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