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2017 Diamondback

El Oso de Acero

A 26″ steel frame rigid fat bike with mid-range components and tektro mechanical disc brakes.
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FrameSteel
SuspensionRigid
ForkSteel
Wheels26″ Aluminum
Drivetrain3 × 9
GroupsetAlivio, Acera
BrakesTektro Mechanical Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
El Oso de Acero
Other Fat bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

26 mph

El Oso de Acero

23 mph

Similar Bikes

Highest gear

(descending)

Sizing
SM

5'2" – 5'7"

MD

5'6" – 5'11"

LG

5'9" – 6'2"

🐐 Estimated

Rider Fit Notes

None yet.

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Reviews
Bicycling
The Diamondback El Oso Is an Affordable and Rad Fat Bike

Feb 2018

Want to steamroll over terrain regular bikes can't conquer? This line of fat bikes is a great bargain—and there's even a mini-version for your sidekick.

Highs
  • Lightweight aluminum frame

  • Quality parts for the price

  • Versatile for sand, snow, and trail surfaces

  • Hydraulic disc brakes on upper-end model

  • Up to 5-inch tire clearance

  • Bikepacking-friendly with rack mounts and wide triangle

Lows
  • It's a bit of a tank even without bags

  • Lower-end models have rigid fork and mechanical brakes

Read Review

Geometry
Specs
Build
Frame

El Oso Butted Heat Treat Steel 1-1/8"Headtube, 150mm Rear OLD, Fits up to 26x5" tire

Fork

DB El Oso Custom Rigid Steel Fork, 1-1/8", 135mm QR Dropouts

Bottom Bracket

Sealed Cartridge

Headset

Threadless 1-1/8" Aheadset

Stem

DB 3D Forged, +/-7° Rise 31.8

Handlebar

DB Pro Bar740mm width, 15mm rise, 31.8mm barbore

Saddle

DB Race M-series saddle w/ cromo rails

Seatpost

DB Alloy 27.2mm

TypeRigid

Pedals

DB Alloy w/ molded traction pins

Grips

DB High Density Foam Grip

Groupset
Rear Derailleur

Shimano Alivio M4000

Front Derailleur

Shimano Alivio M410 E-Type

Crank

Shimano Acera M3000, 40/30/22T

Shifters

Shimano Alivio M4000 9spd

Cassette

Shimano HG300 9spd (12-36t)

Chain

KMC X9 EPT Anti-Rust

Brakes

Tektro Mira Mechanical Disc, 160mm/160mm Rotor

TypeTektro Mechanical Disc

Brake Levers

Tektro RAL84A

Wheels
Rims

DB75mm Wide w/28mm cutout, singlewall 32h

Spokes

14g Stainless Steel

Front Hub

Alloy 32h Disc, 3/8" Nutted 135mm

Rear Hub

Alloy 32h Dsic, Cassette, 3/8" Nutted 150mm

Tires

Chaoyang Cruiser 26"x4.0"

Rider Notes
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First added January 17

Last updated January 17

Not listed for 3,441 days