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Diamondback

Diamondback El Oso Tres Mountain Bike

Gloss black

Diamondback

Diamondback El Oso Tres Mountain Bike

$2,199.99 + Free Shipping!
Color:
Gloss Black
CG Rewards Members Earn 2,199.99 Points w/ Purchase of This Product!   Learn More
Diamondback designed the El Oso Tres to be capable of any adventure you point it at. Of course, you might argue that a fat bike with suspension fork is overkill, what with the high-volume/low-pressure Maxxis Minion FBF/FBR 26x4.0-inch tires already soaking up rocks and gripping Mother Earth like they were slathered in glue.

Then again, Diamondback built this bike with the most remote and technical trails in mind. When you’re days away from the nearest trailhead, a burly, winter-tested fork plus a reliable parts package all come in real handy. The KS E30i dropper seatpost improves maneuverability on dicey downhills. Thru-axles front and rear add stiffness for enhanced steering precision. Overkill? Heck. Yeah. Bring on the overkill. Bring on the adventure.
Frame:El Oso 6061-T6 Double Butted Aluminum, Formed Top and Down Tube, 1.5" Tapered Machined Headtube, 197mm Thru Axle, Fits up to 26x5" Tire
Fork:Manitou Mastadon Comp, 100mm, 34mm Stanchion, 3 Position Compression Adjust, VTT Cartidge, 150x15mm Hex-Lock Thru-axle, 1.5" Taper Steerer
Crankset:Raceface Æffect, 28T Direct Mount Narrow Wide
Shifters:Shimano XT M8000 Shadow Plus, 11 Speed
Headset:FSA No.57, Sealed Cartridge
Wheelset:Sun Ringle Mulefüt SL 80mm
Seatpost:KS E30i Dropper, SM = 125mm, MD/LG/XL = 150mm w/Southpaw Remote
Pedals:DB CNC Platform, Sealed Cartidge Bearing w/Replaceable Pins
Stem:DB35 Alloy, 60mm Reach, 35mm Bar Bore
Handlebars:DB35 Alloy, 760mm Wide, 15mm Rise, 35mm Bar Bore
Saddle:DB Race M-series Saddle
Cassette:Shimano XT M8000, 11 Speed, 11-46T
Brakes:Shimano SLX M7000, w/180mm Front /180mm Rear Rotors
Tires:Maxxis Minion FBF 26x4.0" EXO, TLR, Folding / Maxxis Minion FBR 26x4.0" EXO, TLR, Folding, 120tpi
Bottom Bracket:Raceface Outboard Bearing
Extras:Tool Kit, Carbon Paste
size guide

All bikes purchased through City Grounds MUST be assembled by a certified bike shop mechanic. If the bike is NOT built by a certified bike shop mechanic, any warranty will be VOID. We will request for an assembly receipt as proof of professional installation.

For all warranty claims, please contact our Warranty Team at warranty@citygrounds.com. So that we can help you in a timely manner, make sure to include the following:

  • 1. Order Number (we will confirm date of purchase and determine if the item is still under the manufacturer’s warranty time limit)
  • 2. Brief description of the claim
  • 3. Photographs
  • 4. If the item is a bike or frame, include the serial number

We evaluate all warranties case-by-case to determine the best course of action and get you serviced to the best of our ability!

Warranty does not apply to the following:

  • • Any part of a product that has been installed, altered, repaired, or misused
  • • Damage from unintended style of riding, abuse, neglect, accident, and racing
  • • Normal wear and tear of any product (including but not limited to - saddles, grips, tires, tubes, cables, brake pads, chains)
  • • Failure to provide regular maintenance of any product

Labor and shipping are the responsibility of the customer. We do not cover parts purchased and labor performed by another bike shop.

Note: Warranty is for original owner only.

Diamondback designed the El Oso Tres to be capable of any adventure you point it at. Of course, you might argue that a fat bike with suspension fork is overkill, what with the high-volume/low-pressure Maxxis Minion FBF/FBR 26x4.0-inch tires already soaking up rocks and gripping Mother Earth like they were slathered in glue.

Then again, Diamondback built this bike with the most remote and technical trails in mind. When you’re days away from the nearest trailhead, a burly, winter-tested fork plus a reliable parts package all come in real handy. The KS E30i dropper seatpost improves maneuverability on dicey downhills. Thru-axles front and rear add stiffness for enhanced steering precision. Overkill? Heck. Yeah. Bring on the overkill. Bring on the adventure.
Frame:El Oso 6061-T6 Double Butted Aluminum, Formed Top and Down Tube, 1.5" Tapered Machined Headtube, 197mm Thru Axle, Fits up to 26x5" Tire
Fork:Manitou Mastadon Comp, 100mm, 34mm Stanchion, 3 Position Compression Adjust, VTT Cartidge, 150x15mm Hex-Lock Thru-axle, 1.5" Taper Steerer
Crankset:Raceface Æffect, 28T Direct Mount Narrow Wide
Shifters:Shimano XT M8000 Shadow Plus, 11 Speed
Headset:FSA No.57, Sealed Cartridge
Wheelset:Sun Ringle Mulefüt SL 80mm
Seatpost:KS E30i Dropper, SM = 125mm, MD/LG/XL = 150mm w/Southpaw Remote
Pedals:DB CNC Platform, Sealed Cartidge Bearing w/Replaceable Pins
Stem:DB35 Alloy, 60mm Reach, 35mm Bar Bore
Handlebars:DB35 Alloy, 760mm Wide, 15mm Rise, 35mm Bar Bore
Saddle:DB Race M-series Saddle
Cassette:Shimano XT M8000, 11 Speed, 11-46T
Brakes:Shimano SLX M7000, w/180mm Front /180mm Rear Rotors
Tires:Maxxis Minion FBF 26x4.0" EXO, TLR, Folding / Maxxis Minion FBR 26x4.0" EXO, TLR, Folding, 120tpi
Bottom Bracket:Raceface Outboard Bearing
Extras:Tool Kit, Carbon Paste

All bikes purchased through City Grounds MUST be assembled by a certified bike shop mechanic. If the bike is NOT built by a certified bike shop mechanic, any warranty will be VOID. We will request for an assembly receipt as proof of professional installation.

For all warranty claims, please contact our Warranty Team at warranty@citygrounds.com. So that we can help you in a timely manner, make sure to include the following:

  • 1. Order Number (we will confirm date of purchase and determine if the item is still under the manufacturer’s warranty time limit)
  • 2. Brief description of the claim
  • 3. Photographs
  • 4. If the item is a bike or frame, include the serial number

We evaluate all warranties case-by-case to determine the best course of action and get you serviced to the best of our ability!

Warranty does not apply to the following:

  • • Any part of a product that has been installed, altered, repaired, or misused
  • • Damage from unintended style of riding, abuse, neglect, accident, and racing
  • • Normal wear and tear of any product (including but not limited to - saddles, grips, tires, tubes, cables, brake pads, chains)
  • • Failure to provide regular maintenance of any product

Labor and shipping are the responsibility of the customer. We do not cover parts purchased and labor performed by another bike shop.

Note: Warranty is for original owner only.

size guide

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Delivery Options

City Grounds now offers multiple options for getting your bike to you! Get hands on and build up your bike yourself, or avoid the hassle and get the bike delivered completely ready to ride to your door!

Assembled & Delivered

$125
  • Professionally assembled and delivered right to your door.
  • Our trusted mechanic will contact you for a convenient delivery time.
  • Automatically activates warranty - learn more.
  • *Available in most metropolitan markets.
    Contact us to confirm.

DIY

FREE
  • Save money with the Do-It-Yourself option.
  • Perfect for DIY-ers who are unafraid of a little grease!
  • Tools are required.
  • Activates limited warranty - learn more

DIY

FREE
  • Save money with the Do-It-Yourself option.
  • Perfect for DIY-ers who are unafraid of a little grease!
  • Tools are required.
  • Activates limited warranty - learn more
  • Shipping is free!

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