Shipping is FREE with BIKESPORTSMTB Store Pickup.

Diamondback El Oso Fat Bike

Email for the best deal. We have the best prices anywhere!
Diamondback El Oso Fat Bike

Your Benefits


Best Prices
Fast Delivery
365 Days Return Policy
Buyer Protection
Secure Shopping with SSL
Privacy Policy


Questions? Please don’t hesitate to contact us. We hope to become your resource as you shop for a new pro-quality bike, or any of the parts, clothing, or accessories that you need.

Free Shipping $1500 or More
does not include duty tax




Free Shipping


100% Guaranteed Returns




Brand: Diamondback
Product Code: El Oso Fat
Availability: In Stock

Available Options

* Colors:

* Size:

Qty: Add to Cart

Delivery & Returns


All of our bicycles are fully built by our experienced and certified mechanics prior to delivery; all you will need to do is turn the handlebars and fit some pedals. Bicycles are shipped from a different warehouse to other items and so may arrive in advance of any other items you have ordered.



We offer a 365 day returns period for all items. Items must be returned unused and in their original packaging. Postage labels and collection services are available at a small cost for all items - including bicycles.


Diamondback El Oso Fat Bike


  • Designed to excel in sand or snow, the high-volume and low-pressure tires gain purchase on trails and surfaces that might be unrideable otherwise

  • Shimano SLX M675 Shadow Plus 10-speed rear derailleur and FSA double chainring crank give you 20 speeds to choose from

  • Powerful disc brakes help you stop in varied conditions

  • 26 x 4.5 in. tires are wide enough to keep you going where other bikes give up

Technical specs

Best Use

Mountain Biking

Mountain Bike Style



6061-T6 double-butted aluminum

Bike Suspension

Front Suspension


RockShox Bluto, Solo Air, 32mm Stanchion

Fork Travel

100 millimeters


Race Face Ride, 36/26T

Bottom Bracket

Race Face outboard bearing


Shimano SLX M670, 2 x 10-speed

Front Derailleur

Shimano Deore M618, top pull, down swing, high direct mount

Rear Derailleur

Shimano SLX M675, Shadow Plus, 10-speed

Rear Cogs

Shimano HG50, 10-speed Cassette, 11-36T

Number of Gears

20 gear(s)

Brake Type

Hydraulic Disc Brake


Shimano M447 with 180mm front and rear rotors

Brake Levers

Shimano M506 with reach adjust


32h Diamondback, 95 Wide with 55mm cutouts, alloy single-wall

Front Hub

32h alloy, sealed cartridge bearing, 150 x 15mm thru-axle with CNC disc mount

Rear Hub

Alloy 32h, sealed cartridge bearing, 197 x 12mm thru-axle with CNC disc mount, cassette

Wheel Size

26 inches


Kenda Juggernaut

Tire Width

4.5 inches

Handlebar Shape

Riser Bar


DB Pro Bar, 750mm width, 15mm rise, 31.8mm bar bore


DB 3D forged, +/-7 rise 31.8

Seat Post

DB micro adjust 30.9mm


DB Race M-series with chromoly rails


DB Platform CNC, with replaceable pins, sealed cartridge bearing


FSA C-40 sealed 1-1/8 in./1.5 in. ACB integrated


KMC X10 EPT anti-rust


45 pounds

Bike Weight

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




There are no reviews for this product.

Write a review

Your Name:

Your Review: Note: HTML is not translated!

Rating: Bad           Good

Enter the code in the box below:

2015 BMC TeamElite TE01 29 XX1 Bike -44%
When you want a World-Cup ready cross-country bike, but don't want to lose mental energy worryin..
$6,599.00 $3,728.00

2016 BMC Speedfox 02 XT Bike -43%
The Speedfox is a tool for enjoying the widest variety of riding as possible with a single bike. The..
$4,999.00 $2,848.00

2017 Argon 18 E-117 Tri+ Ultegra Bike -43%
The “+” of the Argon 18 E-117+ Tri refers to two things.  First is to the fact that..
$4,399.99 $2,518.00

2017 Argon 18 E-119 Tri Ultegra Bike -43%
The Argon 18 E-119 Tri bike is the summation of everything Argon 18 has learned about cheating the w..
$5,999.99 $3,398.00

2017 Argon 18 E-80 105 Bike -40%
The aluminum is their triple-butted 3005 Thermo Tech tubing.  It’s light and easy to work..
$1,899.99 $1,143.00