Diamondback Bicycles El Oso De Acero Fat Mountain Bike Review

Diamondback is among the leading manufacturers of various bikes that are popular among the masses. With such great diversity in its range, how can one expect it to omit the key niche of fattie bikes! The Diamondback Bicycles El Oso De Acero Fat Mountain Bike is a wonderful depiction of the manufacturer's efforts in the fat bikes tiers.

As the name illustrates (Acero is a Spanish word which means ‘steel'), the bike is carefully crafted from steel which endows resilience to its framework. If somebody asks me about the best fat mountain bikes, I would certainly recommend this model owing to its endurance, stability, attractiveness, and the plethora of useful features.


38 pounds




Shimano mechanical disc brakes


27 speed


Rigid steel fork

Available in:

Small and Medium size

Other Features:

1 1/8" headtube, 75mm wide rims,26x4.0" fat tires

Diamondback El Oso Alternatives:

Product Name




Diamondback Bicycles El OSO Dos Fatbike Hardtail Mountain Bike


2x10 speed

Diamondback El OSO Nino Fat Bike 2017


1x7 speed

Diamondback Bicycles El OSO Uno, Fat Bike Hardtail Mountain Bike


2x9 speed

Diamondback El Oso De Acero Fat Mountain Bike Features

The Diamondback Bicycles El Oso De Acero Fat Mountain Bike is packed with various powerful features and specs that make it the preferred choice for everyone. Apparently, it resembles more to a mountain bike than a typical fat bike. Nonetheless, the traits it bears are simply matchless. Here I give a comprehensive review of the features and specs of this bike.

"26 x 4" Cruise Tires to Balance Weight:

Like for any other fat bike, the Diamondback El Oso Fat Bike also bears everything needed to balance weight. You can witness it from its choice of tires. How swiftly it manages to provide you a stable ride.

This Diamondback Bike carries 26-inch Chaoyang Cruiser tires, each of which is 4 inches wide. Yet, the tire frame can accommodate a tire of up to 5 inches. The rims of the tire are composed of an alloy with various cutouts for reducing weight.

Shimano 27 Gear Setting:

By looking at the speed shifters of this fat bike, it seems that the manufacturers are all ready to outclass its competitors. For any fat mountain bike, what counts the most is its ability to control speed while mountain riding. Being a fat bike, this bike also offers swift gear setting with Shimano shifters.

You can choose any one of your desired settings from the 27 gears powered by Shimano 3x9 drivetrain. Thus, whether you are climbing up and need robust gear controls, or are coming downwards with a need for smooth gears, you can do it all with this fat bike.

Resilient Steel Framework:

It is not difficult to judge the manufacturing element of its robust framework. The Diamondback De Acero Mountain Bike is designed with an attractive heat-treated steel framework which confers resistance, strength, and durability to the bike. 

No matter how rough your tracks are, with this bike, you can freely enjoy your expedition without worrying about the maintenance of your bike. It is because of this robustness and endurance that makes these bikes favorable for the new riders. Moreover, this steel framework is carefully crafted and polished to make your bike attractive and appealing.

Efficient Mechanical Brakes:

What is the most desirable feature for you in any bike, especially a fat mountain bike? The provision of apply instant brakes, isn't it? Well, if your answer is a 'yes', then your wish is now granted! The amazing bike features Shimano Alivio mechanical disc brakes that let you take complete control of your bike.

With these entirely mechanical brakes, you can instantly stop your bike regardless of how high you were speeding. These brakes are strong enough to control those 4 inch wide tires to halt your movement. Hence, you can ride freely to all rough terrains with full confidence to stop your movement upon hard obstacles.


  • Available in various sizes to support riders with varying heights
  • Fat tires ensure excellent traction
  • Highly robust framework to withstand rough terrains
  • Suitable for new riders as well
  • 27 gear settings to customize your ride on the high and low levels
  • Mechanical disc brakes ensure instant brakes
  • Wide fat tires provide smooth ride


  • Steel framework makes it heavier than most bikes
  • Sometimes less responsive
  • May not be well-suited for speedy riders

Frequent Asked Questions (FAQs)

Q: What is the approximate weight of this bike?

A: This Diamondback Bicycles El Oso De Acero Fat Mountain Bike is a relatively heavier bike as it is made of steel. It is difficult to mention a defined weight since it varies with the size. However, it usually weighs around 38 pounds or more.

Q: I am 5'8". Can I ride this bike?

A: Of course, you can. You can find this bike in various sizes, predominantly, 16 inches, 18 inches, and 20 inches, which easily get along well with people tall-heightened up to 5'11".

Q: Will it take time to assemble?

A: Not really. This bike comes in an easy to assemble way. It will hardly take you an hour (maximum) to assemble it.

Final Verdict:

The Diamondback De Acero Fat Hardtail Mountain Bike is a desirable model for people who like to ride fat tire bikes. This bike can provide you a smooth mountain riding experience as well owing to its wonderful features. The main attraction in this bike is its availability in various sized with a low price. It is surely affordable for large masses.

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