Diamondback  El Oso Grande Fat Bike - 2016

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Diamondback designed the El Oso Grande around a rigid platform to shave pounds and let the gigantic tires take care of the suspension, floating over sand, snow, or crazy-loose trails.

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Features

  • With hydroformed aluminum tubes, the frame and fork allow an amazingly nimble ride
  • SRAM X5 2x10 drivetrain has a gear for any trail, and mechanical disc brakes provide excellent modulation and stopping power
  • 26 x 4.9 in. tires can be comfortably ridden with PSI in the low teens
  • NOTE: Specs and images are subject to change based on component availability

Imported.

This bike comes with Coast to Coast Support, which includes:
  • 1 year of free adjustments (see more below)
  • In-store bike assembly
  • Pickup in store or curbside
  • Bike experts available at 170+ bike shops
REI Co-op Members get more:
  • 20% off shop services
  • Free tubes with purchase of flat tire repair (Co-op Cycles brand tubes only; tube must be installed at time of purchase)
More about our free adjustments:
New bikes go through a normal break-in period, after which they should be readjusted. All bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.

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Technical Specs

Best Use

Mountain Biking

Mountain Bike Style

Cross-country

Frame

6061 aluminum

Fork

Alloy

Bike Suspension

No Suspension

Crankset

FSA Comet Mega Exo, 36/26

Bottom Bracket

FSA Mega Exo

Shifters

SRAM X5

Front Derailleur

SRAM X5

Rear Derailleur

SRAM X5

Rear Cogs

Shimano HG50, 11-36, 10-speed

Number of Gears

20 gear(s)

Brake Type

Mechanical Disc Brake

Brakes

TRP Spyke mechanical disc

Brake Levers

TRP ML800 Spyke

Rims

DB

Front Hub

Alloy disc, 32h

Rear Hub

Alloy disc, 32h

Wheel Size

26 inches

Tires

Chaoyang Cruiser, 26 x 4.9

Handlebar Shape

Riser Bar

Handlebar

DB Pro Bar

Stem

DB 3D forged

Seat Post

DB micro adjust

Saddle

DB Race M-series

Pedals

DB alloy platform

Headset

FSA C-40

Chain

KMC X10

Weight

34 lbs. 13 oz. pounds

Bike Weight

Bike weight is based on median size, as sold, or the average of two median sizes.

Gender

Unisex

Size Chart

Diamondback Bikes (893052)
SML
Height Range5’5”-5’9”5’10”-6’0”6’1-6’4”
Reach408434455
Stack600609609
Effective Top Tube580609630
Seat Tube Center-Top400457500
Standover Height787804820
Head Tube Length110120120
Head Tube Angle (degrees)68.568.568.5
Seat Tube Angle (degrees)747474
Bottom Bracket Height342342342
Wheelbase112511551176
Chainstay460460460
Fork Offset505050

Sizing Notes

Bike measurements are stated in millimeters.

How we measure bikes

  1. Standover Height Standover Height is a measurement from the ground to the top of the top tube, measured at the midpoint of the top tube.
  2. Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
  3. Stack Stack is the vertical distance from the center of the cranks to the center of the head tube, measured to the top of the head tube.
  4. Effective Top Tube Effective top tube is the distance from the center of the head tube to the center of the seat tube/seat post, measured parallel to the ground.
  5. Seat Tube Center to Top Seat Tube length is the measurement of the seat tube, from the center of the cranks to the top of the seat tube.
  6. Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
  7. Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
  8. Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
  9. Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
  10. Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
  11. Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
  12. Fork Offset Fork Offset, or rake, is the distance from the front axle to a line drawn parallel to the center of the head tube or steering axis.

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