Diamondback El Oso Grande


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The El Oso Grande features the largest tires of the three Diamondback fat bikes.  Although it shares the same frame as the El Oso, to shave pounds for the gigantic 26 x 4.9" tires it comes with a rigid fork...the large tires with PSI in the low teens provide the suspension!

With hydroformed aluminum tubes, the frame and fork allow an amazingly nimble ride.  A SRAM X5 2×10 drivetrain has a gear for any trail, and disc brakes provide excellent modulation and stopping power.

Whether you're bikepacking, riding in deep sand and snow, or just enjoying the excess traction on normal trails, this fat bike is prepared!

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 DB El Oso Custom Rigid Alloy Fork, 1.5 Taper, 150mmx15mm Thru
Headset FSA C-40 Sealed 1-1/8"/1.5" ACB Integrated
Cranks FSA Comet Mega Exo, 36/26T
Bottom Bracket FSA Mega Exo
Front Derailleur SRAM X5 High Direct Mount
Rear Derailleur SRAM X5
Shifter SRAM X5 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 Chaoyang Cruiser 26"x4.9"
Brakes TRP Spyre Mechanical Disc, 160mm/160mm Rotor
Brake Levers TRP ML800 Spyke
Pedals DB Alloy w/ molded traction pins
Handlebar DB Pro Bar740mm width, 15mm rise, 31.8mm barbore
Grips DB High Density Foam Grip
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
Bike Weight 34 lb 13 oz (size medium no pedals)
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 Height 60mm 60mm 60mm
Stem Length
Handlebar Width
Crank Length
Seat Post Length


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