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El Oso

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Our El Oso fat bike really is as much fun to ride as it looks. Throw your leg over it and you may notice most of the bike is pretty standard stuff, at least for Diamondback: a strong and lightweight aluminum frame made with hydroformed tubing, a 100mm travel Rockshox fork, a smooth-shifting Shimano 2×10 drivetrain. If you can keep yourself from looking down as you pedal away, you'll notice it doesn't feel too much different from a normal bike, either. Designed to excel in sand or snow, the high volume / low pressure tires gain purchase on surfaces that have long been unrideable. But you don't have to ride in sand or snow to experience the amazing traction of these tires - a spin on your favorite local trail will have you grinning ear to ear. El Oso does indeed excel on dunes and snow, but it's not limited to them. It's a capable trail bike as well! Wherever you choose to ride it, one thing's for sure: El Oso is a blast.

Frame El Oso Butted 6061-T6 Aluminum w/ Formed Top / Down Tube, 1.5" Tapered Machined Headtube, 197mm Thru Axle, Fits up to 26x5" tire
Fork RockShox Bluto 100mm Solo Air, 32mm Stanchion, Rebound, Lockout, 150mm Thru, 1.5 Taper
Headset FSA C-40 Sealed 1-1/8"/1.5" ACB Integrated
Cranks Raceface Ride, 36/26T
Bottom Bracket Raceface Outboard Bearing
Front Derailleur Shimano Deore M618, High Direct Mount
Rear Derailleur Shimano SLX M615 Shadow Plus
Shifter Shimano SLX M670 10spd
Cogset Shimano HG50 10spd (11-36t)
Chain KMC X10 EPT Anti-Rust
Front Hub Alloy 32h Sealed Cartridge Bearing 150mmx15mm Thru
Rear Hub Alloy 32h Cassette, Sealed Cartridge Bearing 197mmx12mm Thru
Spokes 14g Stainless Steel
Rims DB 95Wide w/55mm Cutout, Singlewall 32h
Tires Kenda Juggernaut 26x4.5"
Brakes Shimano M447 Hydraulic Disc - 180/180mm Rotor
Brake Levers Shimano M506 Hydraulic Disc
Pedals DB Platform CNC, w/replaceable pins, sealed cartidge bearing
Handlebar DB Pro Bar750mm width, 15mm rise, 31.8mm barbore
Grips DB4L Lock-on 135mm D2 Kraton
Stem DB 3D Forged, +/-7° Rise 31.8
Seat DB Race M-series saddle w/ cromo rails
Seatpost DB Micro Adjust 30.9mm
Extras Owner's Manual
Accessories El Oso Butted 6061-T6 Aluminum w/ Formed Top / Down Tube, 1.5" Tapered Machined Headtube, 197mm Thru Axle, Fits up to 26x5" tire
Bike Size S/16" / Rider Height: 5'4" - 5'7" M/18" / Rider Height: 5'7" - 5'10" L/20" / Rider Height: 5'8" - 5'11"
Seat Tube Length 400mm 457mm 500mm
Stand Over Height 787mm 804mm 820mm
Top Tube Length 580mm 609mm 630mm
Stack 600mm 609mm 609mm
Reach 408mm 434mm 455mm
Head Tube Length 110mm 120mm 120mm
Head Angle 68.5° 68.5° 68.5°
Seat Angle 74° 74° 74°
Wheel Base
Chain Stay Length 460mm 460mm 460mm
Fork Offset 50mm 50mm 50mm
BB Drop 60mm 60mm 60mm
Stem Length
Handlebar Width
Crank Length
Seat Post Length

Customer Reviews Write Your Own

You're reviewing: El Oso

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Overall Quality

So much fun!

Review by Jason

I have about 50 rides on this bike since I received it in January. I live in Houston, TX, so there is no snow, but there are lots of trails, roots, sand and rain storms that make the terrain challenging. This bike floats over almost anything and holds a really stable line through the deepest sand and tight corners. I am still really impressed how agile this bike is in single track. The component package is on point and the brakes give you plenty of stopping power for any descent. The 4.5" tires give you traction anywhere you point the front wheel. There are a few things that I still desire; the bike is a tank, weighing in over 35lbs. The other thing I don't really care for is the cable routing. The shift and brake lines are attached to small tabs by zip-tie. These zip-ties are small gauge and can break if something snags one of the cables. Also, the cut end of the zip-tie can scratch your legs the way the bike is received due to their location on the frame. I would love to see some more thought put into the cable routing for this model since I feel like the geometry is so on point.

The El Oso is an eye-catcher and gets plenty of attention. It looks great, handles corners and descents well and is a great choice if you're not overly concerned with weight. Quick acceleration is not a strength for this model, and climbing is not too bad as long as you maintain your speed going into that feature. I've taken mine on concrete trails, single track and even dirt jumps (it feels like a motocross bike in the air). You can leisurely float around or be really aggressive with it and it is robust enough to handle all of that and more. I'd love to see an '18 model that is lighter and offers a solution to the zip-tie cable routing. Overall the bike is really as fun to ride as it looks.

(Posted on 3/16/2017)


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